Vulnerability-Lookup

GHSA-2256-5C36-MWCJ

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-30 03:37

Details

In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack: remove sprintf usage

Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check.

Increase buffer size in mangle_content_len() while at it.

BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e/0x780 nf_confirm+0x34d/0x990 [..]

Severity

9.8 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53002"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:11Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: remove sprintf usage\n\nReplace it with scnprintf, the buffer sizes are expected to be large enough\nto hold the result, no need for snprintf+overflow check.\n\nIncrease buffer size in mangle_content_len() while at it.\n\nBUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270\nWrite of size 1 at addr [..]\n vsnprintf+0xea5/0x1270\n sprintf+0xb1/0xe0\n mangle_content_len+0x1ac/0x280\n nf_nat_sdp_session+0x1cc/0x240\n process_sdp+0x8f8/0xb80\n process_invite_request+0x108/0x2b0\n process_sip_msg+0x5da/0xf50\n sip_help_tcp+0x45e/0x780\n nf_confirm+0x34d/0x990\n [..]",
  "id": "GHSA-2256-5c36-mwcj",
  "modified": "2026-06-30T03:37:13Z",
  "published": "2026-06-24T18:32:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53002"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53002"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492329"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2"
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34"
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b"
    },
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      "type": "WEB",
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    }
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}

CVE-2026-53002 (GCVE-0-2026-53002)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-30 12:09

Title

netfilter: conntrack: remove sprintf usage

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: remove sprintf usage Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check. Increase buffer size in mangle_content_len() while at it. BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e/0x780 nf_confirm+0x34d/0x990 [..]

Severity

9.8 (Critical)


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

7 (High)


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

CWE

CWE-787 - Out-of-bounds Write

Assigner

Linux

References

11 references

URL	Tags
https://git.kernel.org/stable/c/2f793ba78470a99f4…
https://git.kernel.org/stable/c/6bbf829b4c1b44c94…
https://git.kernel.org/stable/c/ab64e61c9323fa6de…
https://git.kernel.org/stable/c/1c9fb8aeed06790d4…
https://git.kernel.org/stable/c/a8e0a32a23d3f3486…
https://git.kernel.org/stable/c/8e3be0d12615a173f…
https://git.kernel.org/stable/c/c08ff52e44945e6ef…
https://git.kernel.org/stable/c/6e7066bdb481a87fe…
https://access.redhat.com/security/cve/CVE-2026-53002	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2492329	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

7 products

Vendor	Product	Version
Linux	Linux	Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 2f793ba78470a99f40389b7dc60a81d9f5ad3956 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 6bbf829b4c1b44c941c47dd0d710f1393258f3d5 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < ab64e61c9323fa6de21bd20da1ddb29a0fb65d34 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < a8e0a32a23d3f34862af3b4da792ecb3a891a9a3 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 8e3be0d12615a173fe260cd42753ca7a001acbf2 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < c08ff52e44945e6ef4ce0790f49ea761b060c45b (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 6e7066bdb481a87fe88c4fa563e348c03b2d373d (git)
Linux	Linux	Affected: 2.6.20 Unaffected: 0 , < 2.6.20 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
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 Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6

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JSON

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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

GHSA-2256-5C36-MWCJ

CVE-2026-53002 (GCVE-0-2026-53002)

Tags

Sightings

Nomenclature