FKIE_CVE-2026-23442

Vulnerability from fkie_nvd - Published: 2026-04-03 16:16 - Updated: 2026-10-15 02:18
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths __in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER). Add NULL checks for idev returned by __in6_dev_get() in both seg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL pointer dereferences.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/50352fc103928e10e8729abc79a0d05abef26c4d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83d705d35e583cb1b1eacf196dfe7b77d442018e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c5cedee5d97382176573bbe21e1724e737a5eb64
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d1bd8b9edc6752d10f84d28ff64f842401ce336d
0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-784472.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 4.10
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/exthdrs.c",
            "net/ipv6/seg6_hmac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
            {
              "lessThan": "83d705d35e583cb1b1eacf196dfe7b77d442018e",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
            {
              "lessThan": "d1bd8b9edc6752d10f84d28ff64f842401ce336d",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
            {
              "lessThan": "50352fc103928e10e8729abc79a0d05abef26c4d",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
            {
              "lessThan": "bc9843c39f9932a8b36efd1d362ea00bb88e4e78",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
            {
              "lessThan": "c5cedee5d97382176573bbe21e1724e737a5eb64",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
            {
              "lessThan": "a25853c9feea7bbf31d157ff6e004d2d3b4f7f13",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
            {
              "lessThan": "06413793526251870e20402c39930804f14d59c0",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/exthdrs.c",
            "net/ipv6/seg6_hmac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.10"
            },
            {
              "lessThan": "4.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.25",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C9FB8914-AA64-42C8-B1C5-31091B1EAA92",
              "versionEndExcluding": "6.12.83",
              "versionStartIncluding": "4.10.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "74050944-3704-4081-A5DA-C5DAB1E275E6",
              "versionEndExcluding": "6.19.10",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.10:-:*:*:*:*:*:*",
              "matchCriteriaId": "C201E405-86F2-4F96-984A-00A865219C86",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: add NULL checks for idev in SRv6 paths\n\n__in6_dev_get() can return NULL when the device has no IPv6 configuration\n(e.g. MTU \u003c IPV6_MIN_MTU or after NETDEV_UNREGISTER).\n\nAdd NULL checks for idev returned by __in6_dev_get() in both\nseg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL\npointer dereferences."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nipv6: a\u00f1adir comprobaciones de NULL para idev en las rutas SRv6\n\n__in6_dev_get() puede devolver NULL cuando el dispositivo no tiene configuraci\u00f3n IPv6 (p. ej., MTU \u003c IPV6_MIN_MTU o despu\u00e9s de NETDEV_UNREGISTER).\n\nA\u00f1adir comprobaciones de NULL para idev devuelto por __in6_dev_get() tanto en seg6_hmac_validate_skb() como en ipv6_srh_rcv() para prevenir posibles desreferencias de puntero NULL."
    }
  ],
  "id": "CVE-2026-23442",
  "lastModified": "2026-10-15T02:18:56.993",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-04-03T16:16:28.423",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/50352fc103928e10e8729abc79a0d05abef26c4d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/83d705d35e583cb1b1eacf196dfe7b77d442018e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c5cedee5d97382176573bbe21e1724e737a5eb64"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d1bd8b9edc6752d10f84d28ff64f842401ce336d"
    },
    {
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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