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

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-04-27 13:56
VLAI?
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
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < 50352fc103928e10e8729abc79a0d05abef26c4d (git)
Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < bc9843c39f9932a8b36efd1d362ea00bb88e4e78 (git)
Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < c5cedee5d97382176573bbe21e1724e737a5eb64 (git)
Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < a25853c9feea7bbf31d157ff6e004d2d3b4f7f13 (git)
Affected: 1ababeba4a21f3dba3da3523c670b207fb2feb62 , < 06413793526251870e20402c39930804f14d59c0 (git)
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    Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (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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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/exthdrs.c",
            "net/ipv6/seg6_hmac.c"
          ],
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      "title": "ipv6: add NULL checks for idev in SRv6 paths",
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    "datePublished": "2026-04-03T15:15:26.851Z",
    "dateReserved": "2026-01-13T15:37:46.018Z",
    "dateUpdated": "2026-04-27T13:56:17.202Z",
    "state": "PUBLISHED"
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.