CVE-2026-63912 (GCVE-0-2026-63912)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-20 13:41
VLAI
Title
xfrm: esp: restore combined single-frag length gate
Summary
In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: restore combined single-frag length gate The ESP out-of-place fast path appends the trailer in esp_output_head() before esp_output_tail() allocates the destination page frag. The head-side gate currently checks skb->data_len and tailen separately, but the tail code allocates a single destination frag from the combined post-trailer skb->data_len. Reject the page-frag fast path when the combined aligned length exceeds a page. Otherwise skb_page_frag_refill() may fall back to a single page while the destination sg still spans the combined skb->data_len. Restore this combined-length page gate for both IPv4 and IPv6.
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: c075c3ea031757f8ea2d34567565b61a868c08d5 , < 566295735530ee513326049b0540f32ec050bf2e (git)
Affected: a583f2f3c8788bffd7fd7baeb76bd6d80543d7ea , < 5d7ab86e2b6bc23054616bf6ac562013bf60af8c (git)
Affected: 5bd8baab087dff657e05387aee802e70304cc813 , < 36519e3d941fc99d3b52c134dbaf311f987a4708 (git)
Affected: 5bd8baab087dff657e05387aee802e70304cc813 , < 322e48187e0245ab2fff6fec2220b0cae677dbec (git)
Affected: 5bd8baab087dff657e05387aee802e70304cc813 , < b84091ceddc9f133229dceab3ccc930bf27f9cba (git)
Affected: 5bd8baab087dff657e05387aee802e70304cc813 , < c093468aea8277f77272a4f199b2e15e19cabb59 (git)
Affected: 5bd8baab087dff657e05387aee802e70304cc813 , < 65f3b3fc2347b89fe21db1e92c7681368415f095 (git)
Affected: 5bd8baab087dff657e05387aee802e70304cc813 , < dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40 (git)
Affected: 2c66b0c95bb0aa7652ba1eba293d0d5993b35a38 (git)
Affected: ef6f83df1209a7d9bd1c605a62457d4c00f9179e (git)
Affected: 3defefd22ad5fbbe639b6157fb7e6311b2bf333d (git)
Affected: b657030870bb5351c5b1e84d4e9f186da6ca0496 (git)
Affected: 5.10.113 , < 5.10.259 (semver)
Affected: 5.15.36 , < 5.15.210 (semver)
Affected: 4.14.288 , < 4.15 (semver)
Affected: 4.19.252 , < 4.20 (semver)
Affected: 5.4.205 , < 5.5 (semver)
Affected: 5.17.5 , < 5.18 (semver)
Create a notification for this product.
Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (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)
Create a notification for this product.
Show details on NVD website
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Otherwise skb_page_frag_refill() may fall back to a single page while\\nthe destination sg still spans the combined skb-\u003edata_len.\\n\\nRestore this combined-length page gate for both IPv4 and 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  }
}



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Tags
Taxonomy of the tags.





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.