Vulnerability-Lookup

GHSA-PRGG-RGFW-VR94

Vulnerability from github – Published: 2026-04-03 18:31 – Updated: 2026-06-01 18:31

Details

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.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23442"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-03T16:16:28Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-prgg-rgfw-vr94",
  "modified": "2026-06-01T18:31:23Z",
  "published": "2026-04-03T18:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23442"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50352fc103928e10e8729abc79a0d05abef26c4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83d705d35e583cb1b1eacf196dfe7b77d442018e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5cedee5d97382176573bbe21e1724e737a5eb64"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1bd8b9edc6752d10f84d28ff64f842401ce336d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-23442 (GCVE-0-2026-23442)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-06-01 16:11

Title

ipv6: add NULL checks for idev in SRv6 paths

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.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/0348fa0ada37cef7c…
https://git.kernel.org/stable/c/83d705d35e583cb1b…
https://git.kernel.org/stable/c/d1bd8b9edc6752d10…
https://git.kernel.org/stable/c/50352fc103928e10e…
https://git.kernel.org/stable/c/bc9843c39f9932a8b…
https://git.kernel.org/stable/c/c5cedee5d97382176…
https://git.kernel.org/stable/c/a25853c9feea7bbf3…
https://git.kernel.org/stable/c/06413793526251870…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < 0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4 (git) Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < 83d705d35e583cb1b1eacf196dfe7b77d442018e (git) Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < d1bd8b9edc6752d10f84d28ff64f842401ce336d (git) Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < 50352fc103928e10e8729abc79a0d05abef26c4d (git) Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < bc9843c39f9932a8b36efd1d362ea00bb88e4e78 (git) Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < c5cedee5d97382176573bbe21e1724e737a5eb64 (git) Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < a25853c9feea7bbf31d157ff6e004d2d3b4f7f13 (git) Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < 06413793526251870e20402c39930804f14d59c0 (git)
Linux	Linux	Affected: 4.10 Unaffected: 0 , < 4.10 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.136 , ≤ 6.6.* (semver) Unaffected: 6.12.83 , ≤ 6.12.* (semver) Unaffected: 6.18.25 , ≤ 6.18.* (semver) Unaffected: 6.19.10 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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",
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              "versionType": "git"
            },
            {
              "lessThan": "bc9843c39f9932a8b36efd1d362ea00bb88e4e78",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
            {
              "lessThan": "c5cedee5d97382176573bbe21e1724e737a5eb64",
              "status": "affected",
              "version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
              "versionType": "git"
            },
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              "versionType": "git"
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              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
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                {
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                  "versionStartIncluding": "4.10",
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                {
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                },
                {
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                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
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      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-01T16:11:11.872Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/83d705d35e583cb1b1eacf196dfe7b77d442018e"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1bd8b9edc6752d10f84d28ff64f842401ce336d"
        },
        {
          "url": "https://git.kernel.org/stable/c/50352fc103928e10e8729abc79a0d05abef26c4d"
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        {
          "url": "https://git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78"
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          "url": "https://git.kernel.org/stable/c/c5cedee5d97382176573bbe21e1724e737a5eb64"
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          "url": "https://git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13"
        },
        {
          "url": "https://git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0"
        }
      ],
      "title": "ipv6: add NULL checks for idev in SRv6 paths",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23442",
    "datePublished": "2026-04-03T15:15:26.851Z",
    "dateReserved": "2026-01-13T15:37:46.018Z",
    "dateUpdated": "2026-06-01T16:11:11.872Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-PRGG-RGFW-VR94

CVE-2026-23442 (GCVE-0-2026-23442)

Tags

Sightings

Nomenclature