Vulnerability-Lookup

SUSE-SU-2026:21640-1

Vulnerability from csaf_suse - Published: 2026-05-13 16:34 - Updated: 2026-05-13 16:34

Summary

Security update for dnsmasq

Severity

Important

Notes

Title of the patch: Security update for dnsmasq

Description of the patch: This update for dnsmasq fixes the following issues Security issues: - CVE-2026-2291: dnsmasq can be abused to record false cached data enabling DoS or attacker redirect (bsc#1258251). - CVE-2026-4890: DoS vulnerability in the DNSSEC validation (bsc#1265001). - CVE-2026-4891: heap-based out-of-bounds read vulnerability in the DNSSEC validation (bsc#1265002). - CVE-2026-4892: heap-based out-of-bounds write vulnerability in the DHCPv6 implementation (bsc#1265003). - CVE-2026-4893: information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks (bsc#1265004). - CVE-2026-5172: buffer overflow in dnsmasq's extract_addresses() function (bsc#1265006). - CVE-2026-6507: out-of-bounds write in DHCP BOOTREPLY processing can lead to denial of service (bsc#1262487). Non security issues: - aardvark-dns upstream tests make dnsmasq dump core (bsc#1247812). - Drop rcFOO symlinks for CODE16 (jsc#PED-266. - libnettle: update to 4.0 breaks dnsmasq and gnutls (bsc#1257934). - unknown user or group: dnsmasq with latest proposed dnsmasq update when doing virsh net-start (bsc#1235517). - Update to security release 2.92rel2.

Patchnames: SUSE-SL-Micro-6.2-742

CVE-2026-2291

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-4890

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-4891

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2026-4892

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-4893

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2026-5172

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-6507

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact important

References

36 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1235517	self
https://bugzilla.suse.com/1235834	self
https://bugzilla.suse.com/1247812	self
https://bugzilla.suse.com/1257934	self
https://bugzilla.suse.com/1258251	self
https://bugzilla.suse.com/1262487	self
https://bugzilla.suse.com/1265001	self
https://bugzilla.suse.com/1265002	self
https://bugzilla.suse.com/1265003	self
https://bugzilla.suse.com/1265004	self
https://bugzilla.suse.com/1265006	self
https://www.suse.com/security/cve/CVE-2026-2291/	self
https://www.suse.com/security/cve/CVE-2026-4890/	self
https://www.suse.com/security/cve/CVE-2026-4891/	self
https://www.suse.com/security/cve/CVE-2026-4892/	self
https://www.suse.com/security/cve/CVE-2026-4893/	self
https://www.suse.com/security/cve/CVE-2026-5172/	self
https://www.suse.com/security/cve/CVE-2026-6507/	self
https://www.suse.com/security/cve/CVE-2026-2291	external
https://bugzilla.suse.com/1258251	external
https://www.suse.com/security/cve/CVE-2026-4890	external
https://bugzilla.suse.com/1265001	external
https://www.suse.com/security/cve/CVE-2026-4891	external
https://bugzilla.suse.com/1265002	external
https://www.suse.com/security/cve/CVE-2026-4892	external
https://bugzilla.suse.com/1265003	external
https://www.suse.com/security/cve/CVE-2026-4893	external
https://bugzilla.suse.com/1265004	external
https://www.suse.com/security/cve/CVE-2026-5172	external
https://bugzilla.suse.com/1265006	external
https://www.suse.com/security/cve/CVE-2026-6507	external
https://bugzilla.suse.com/1262487	external

JSON

To clipboard

{
  "document": {
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        "text": "This update for dnsmasq fixes the following issues\n\nSecurity issues:\n\n- CVE-2026-2291: dnsmasq can be abused to record false cached data enabling DoS or attacker redirect\n  (bsc#1258251).\n- CVE-2026-4890: DoS vulnerability in the DNSSEC validation (bsc#1265001).\n- CVE-2026-4891: heap-based out-of-bounds read vulnerability in the DNSSEC validation (bsc#1265002).\n- CVE-2026-4892: heap-based out-of-bounds write vulnerability in the DHCPv6 implementation (bsc#1265003).\n- CVE-2026-4893: information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks\n  (bsc#1265004).\n- CVE-2026-5172: buffer overflow in dnsmasq\u0027s extract_addresses() function (bsc#1265006).\n- CVE-2026-6507: out-of-bounds write in DHCP BOOTREPLY processing can lead to denial of service (bsc#1262487).\n\nNon security issues:\n\n- aardvark-dns upstream tests make dnsmasq dump core (bsc#1247812).\n- Drop rcFOO symlinks for CODE16 (jsc#PED-266.\n- libnettle: update to 4.0 breaks dnsmasq and gnutls (bsc#1257934).\n- unknown user or group: dnsmasq with latest proposed dnsmasq update when doing virsh net-start (bsc#1235517).\n- Update to security release 2.92rel2.\n",
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  "product_tree": {
    "branches": [
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        "branches": [
          {
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    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-2291",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-2291"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-2291",
          "url": "https://www.suse.com/security/cve/CVE-2026-2291"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1258251 for CVE-2026-2291",
          "url": "https://bugzilla.suse.com/1258251"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-05-13T16:34:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-2291"
    },
    {
      "cve": "CVE-2026-4890",
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        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-4890"
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      "notes": [
        {
          "category": "general",
          "text": "A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.",
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          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
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      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-4890",
          "url": "https://www.suse.com/security/cve/CVE-2026-4890"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265001 for CVE-2026-4890",
          "url": "https://bugzilla.suse.com/1265001"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-05-13T16:34:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-4890"
    },
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        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-4891"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-4891",
          "url": "https://www.suse.com/security/cve/CVE-2026-4891"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265002 for CVE-2026-4891",
          "url": "https://bugzilla.suse.com/1265002"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
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          "cvss_v3": {
            "baseScore": 5.3,
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            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
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      ],
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          "category": "impact",
          "date": "2026-05-13T16:34:00Z",
          "details": "moderate"
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      "title": "CVE-2026-4891"
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      "cve": "CVE-2026-4892",
      "ids": [
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-4892"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-4892",
          "url": "https://www.suse.com/security/cve/CVE-2026-4892"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265003 for CVE-2026-4892",
          "url": "https://bugzilla.suse.com/1265003"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
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            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
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          "system_name": "SUSE CVE Page",
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        {
          "category": "general",
          "text": "An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.",
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          "summary": "CVE-2026-4893",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265004 for CVE-2026-4893",
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            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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          "products": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
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      "threats": [
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          "category": "impact",
          "date": "2026-05-13T16:34:00Z",
          "details": "moderate"
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      "title": "CVE-2026-4893"
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    {
      "cve": "CVE-2026-5172",
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        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-5172"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A buffer overflow in dnsmasq\u0027s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record\u0027s end.",
          "title": "CVE description"
        }
      ],
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          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-5172",
          "url": "https://www.suse.com/security/cve/CVE-2026-5172"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265006 for CVE-2026-5172",
          "url": "https://bugzilla.suse.com/1265006"
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      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
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            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
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      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
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            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
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          "category": "impact",
          "date": "2026-05-13T16:34:00Z",
          "details": "important"
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      "title": "CVE-2026-5172"
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-6507"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in dnsmasq. A remote attacker could exploit an out-of-bounds write vulnerability by sending a specially crafted BOOTREPLY (Bootstrap Protocol Reply) packet to a dnsmasq server configured with the `--dhcp-split-relay` option. This can lead to memory corruption, causing the dnsmasq daemon to crash and resulting in a denial of service (DoS).",
          "title": "CVE description"
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      ],
      "product_status": {
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          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
          "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-6507",
          "url": "https://www.suse.com/security/cve/CVE-2026-6507"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1262487 for CVE-2026-6507",
          "url": "https://bugzilla.suse.com/1262487"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.aarch64",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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          },
          "products": [
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            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.ppc64le",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.s390x",
            "SUSE Linux Micro 6.2:dnsmasq-2.92rel2-160000.1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-05-13T16:34:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-6507"
    }
  ]
}

CVE-2026-4893 (GCVE-0-2026-4893)

Vulnerability from cvelistv5 – Published: 2026-05-11 16:48 – Updated: 2026-05-11 19:57

Title

CVE-2026-4893

Summary

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-287 - Improper Authentication

Assigner

certcc

References

6 references

URL	Tags
https://www.kb.cert.org/vuls/id/471747
https://lists.thekelleys.org.uk/pipermail/dnsmasq…
https://thekelleys.org.uk/dnsmasq/CVE/
https://github.com/NixOS/nixpkgs/pull/519093
https://github.com/NixOS/nixpkgs/pull/519082
https://github.com/pi-hole/FTL/releases/tag/v6.6.2

Impacted products

1 product

Vendor	Product	Version
dnsmasq	dnsmasq	Affected: 2.92rel2

Show details on NVD website

JSON

To clipboard

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      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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          },
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              "content": {
                "id": "CVE-2026-4893",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-11T18:28:57.486938Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          "dateUpdated": "2026-05-11T18:29:00.767Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
          "product": "dnsmasq",
          "vendor": "dnsmasq",
          "versions": [
            {
              "status": "affected",
              "version": "2.92rel2"
            }
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        {
          "lang": "en",
          "value": "An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information."
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      "problemTypes": [
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            {
              "description": "CWE-287: Improper Authentication",
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:57:48.774Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://www.kb.cert.org/vuls/id/471747"
        },
        {
          "url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"
        },
        {
          "url": "https://thekelleys.org.uk/dnsmasq/CVE/"
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          "url": "https://github.com/NixOS/nixpkgs/pull/519093"
        },
        {
          "url": "https://github.com/NixOS/nixpkgs/pull/519082"
        },
        {
          "url": "https://github.com/pi-hole/FTL/releases/tag/v6.6.2"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "CVE-2026-4893",
      "x_generator": {
        "engine": "VINCE 3.0.39",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-4893"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2026-4893",
    "datePublished": "2026-05-11T16:48:15.106Z",
    "dateReserved": "2026-03-26T13:12:03.722Z",
    "dateUpdated": "2026-05-11T19:57:48.774Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-4890 (GCVE-0-2026-4890)

Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-05-11 19:58

Title

CVE-2026-4890

Summary

A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-835 - Loop with Unreachable Termination

Assigner

certcc

References

6 references

URL	Tags
https://www.kb.cert.org/vuls/id/471747
https://lists.thekelleys.org.uk/pipermail/dnsmasq…
https://thekelleys.org.uk/dnsmasq/CVE/
https://github.com/NixOS/nixpkgs/pull/519093
https://github.com/NixOS/nixpkgs/pull/519082
https://github.com/pi-hole/FTL/releases/tag/v6.6.2

Impacted products

1 product

Vendor	Product	Version
dnsmasq	dnsmasq	Affected: 2.92rel2

Show details on NVD website

JSON

To clipboard

{
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          "url": "https://github.com/pi-hole/FTL/releases/tag/v6.6.2"
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CVE-2026-4891 (GCVE-0-2026-4891)

Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-05-11 19:58

Title

CVE-2026-4891

Summary

A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-125 - Out-of-bounds Read

Assigner

certcc

References

6 references

URL	Tags
https://lists.thekelleys.org.uk/pipermail/dnsmasq…
https://www.kb.cert.org/vuls/id/471747
https://thekelleys.org.uk/dnsmasq/CVE/
https://github.com/NixOS/nixpkgs/pull/519082
https://github.com/NixOS/nixpkgs/pull/519093
https://github.com/pi-hole/FTL/releases/tag/v6.6.2

Impacted products

1 product

Vendor	Product	Version
dnsmasq	dnsmasq	Affected: 2.92rel2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
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              "attackVector": "NETWORK",
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            {
              "status": "affected",
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        "dateUpdated": "2026-05-11T19:58:20.665Z",
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          "url": "https://www.kb.cert.org/vuls/id/471747"
        },
        {
          "url": "https://thekelleys.org.uk/dnsmasq/CVE/"
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          "url": "https://github.com/NixOS/nixpkgs/pull/519082"
        },
        {
          "url": "https://github.com/NixOS/nixpkgs/pull/519093"
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        {
          "url": "https://github.com/pi-hole/FTL/releases/tag/v6.6.2"
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CVE-2026-2291 (GCVE-0-2026-2291)

Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-05-13 12:45

Title

CVE-2026-2291

Summary

dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.

Severity ?

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

certcc

References

7 references

URL	Tags
https://www.suse.com/security/cve/CVE-2026-2291.html
https://www.kb.cert.org/vuls/id/471747
https://thekelleys.org.uk/dnsmasq/CVE/
https://lists.thekelleys.org.uk/pipermail/dnsmasq…
https://github.com/NixOS/nixpkgs/pull/519082
https://github.com/NixOS/nixpkgs/pull/519093
https://github.com/pi-hole/FTL/releases/tag/v6.6.2

Impacted products

1 product

Vendor	Product	Version
dnsmasq	dnsmasq	Affected: 2.92rel2

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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            }
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        "dateUpdated": "2026-05-11T19:59:05.194Z",
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        },
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          "url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"
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CVE-2026-5172 (GCVE-0-2026-5172)

Vulnerability from cvelistv5 – Published: 2026-05-11 16:48 – Updated: 2026-05-13 12:48

Title

CVE-2026-5172

Summary

A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.

Severity ?

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CWE

CWE-787 - Out-of-bounds Write

Assigner

certcc

References

6 references

URL	Tags
https://www.kb.cert.org/vuls/id/471747
https://lists.thekelleys.org.uk/pipermail/dnsmasq…
https://thekelleys.org.uk/dnsmasq/CVE/
https://github.com/NixOS/nixpkgs/pull/519082
https://github.com/NixOS/nixpkgs/pull/519093
https://github.com/pi-hole/FTL/releases/tag/v6.6.2

Impacted products

1 product

Vendor	Product	Version
dnsmasq	dnsmasq	Affected: 2.92rel2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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CVE-2026-4892 (GCVE-0-2026-4892)

Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-05-11 19:58

Title

CVE-2026-4892

Summary

A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.

Severity ?

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

certcc

References

6 references

URL	Tags
https://lists.thekelleys.org.uk/pipermail/dnsmasq…
https://www.kb.cert.org/vuls/id/471747
https://thekelleys.org.uk/dnsmasq/CVE/
https://github.com/NixOS/nixpkgs/pull/519082
https://github.com/NixOS/nixpkgs/pull/519093
https://github.com/pi-hole/FTL/releases/tag/v6.6.2

Impacted products

1 product

Vendor	Product	Version
dnsmasq	dnsmasq	Affected: 2.92rel2

Show details on NVD website

JSON

To clipboard

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          "url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"
        },
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          "url": "https://www.kb.cert.org/vuls/id/471747"
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          "url": "https://thekelleys.org.uk/dnsmasq/CVE/"
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          "url": "https://github.com/NixOS/nixpkgs/pull/519082"
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CVE-2026-6507 (GCVE-0-2026-6507)

Vulnerability from cvelistv5 – Published: 2026-04-17 12:23 – Updated: 2026-04-20 14:59

Title

Dnsmasq: dnsmasq: denial of service due to out-of-bounds write in dhcp bootreply processing

Summary

A flaw was found in dnsmasq. A remote attacker could exploit an out-of-bounds write vulnerability by sending a specially crafted BOOTREPLY (Bootstrap Protocol Reply) packet to a dnsmasq server configured with the `--dhcp-split-relay` option. This can lead to memory corruption, causing the dnsmasq daemon to crash and resulting in a denial of service (DoS).

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-787 - Out-of-bounds Write

Assigner

redhat

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-6507	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2459181	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public ?

2026-04-17 11:37

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

SUSE-SU-2026:21640-1

CVE-2026-4893 (GCVE-0-2026-4893)

CVE-2026-4890 (GCVE-0-2026-4890)

CVE-2026-4891 (GCVE-0-2026-4891)

CVE-2026-2291 (GCVE-0-2026-2291)

CVE-2026-5172 (GCVE-0-2026-5172)

CVE-2026-4892 (GCVE-0-2026-4892)

CVE-2026-6507 (GCVE-0-2026-6507)

Tags

Sightings

Nomenclature