CVE-2026-63924 (GCVE-0-2026-63924)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-20 13:41
VLAI
Title
ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo()
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() ipv6_hop_jumbo() calls pskb_trim_rcsum(), which can change skb pointers. Let's recompute nh pointer to make sure any change won't mess things up.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b3ac54e5c905f86d22b502eacb5686a282c5659f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 645b99b1a185c91a79bdac4c5de0f91b212d64f0 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9e883eaa878f4337b5873c706efb5a192364ed18 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bddaa4dfc7f36e1ee343a0622f69288af2b9ace9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 72af7beae774e46ed543f3f2f267bf0a141bfcdd (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c512e1c819dfbf6ae95ee7a44b65b9ad98979157 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2b56bbd928c030894c270cd33d60286326919458 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d47548a36639095939f4747d4c43f2271366f565 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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              "status": "unaffected",
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        }
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    "dateReserved": "2026-07-19T07:54:57.021Z",
    "dateUpdated": "2026-07-20T13:41:34.095Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "current_release_date": "2026-07-21T21:30:54+00:00",
      "cve": "CVE-2026-63924",
      "id": "CVE-2026-63924",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63924.json",
      "version": "3"
    }
  }
}



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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

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.