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CVE-2026-63912

xfrm: esp: restore combined single-frag length gate PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected c075c3ea031757f8ea2d34567565b61a868c08d5 before 566295735530ee513326049b0540f32ec050bf2e; affected a583f2f3c8788bffd7fd7baeb76bd6d80543d7ea before 5d7ab86e2b6bc23054616bf6ac562013bf60af8c; affected 5bd8baab087dff657e05387aee802e70304cc813 before 36519e3d941fc99d3b52c134dbaf311f987a4708; affected 5bd8baab087dff657e05387aee802e70304cc813 before 322e48187e0245ab2fff6fec2220b0cae677dbec; affected 5bd8baab087dff657e05387aee802e70304cc813 before b84091ceddc9f133229dceab3ccc930bf27f9cba; affected 5bd8baab087dff657e05387aee802e70304cc813 before c093468aea8277f77272a4f199b2e15e19cabb59; affected 5bd8baab087dff657e05387aee802e70304cc813 before 65f3b3fc2347b89fe21db1e92c7681368415f095; affected 5bd8baab087dff657e05387aee802e70304cc813 before dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40; affected 2c66b0c95bb0aa7652ba1eba293d0d5993b35a38; affected ef6f83df1209a7d9bd1c605a62457d4c00f9179e; affected 3defefd22ad5fbbe639b6157fb7e6311b2bf333d; affected b657030870bb5351c5b1e84d4e9f186da6ca0496; affected 5.10.113 before 5.10.259; affected 5.15.36 before 5.15.210; affected 4.14.288 before 4.15; affected 4.19.252 before 4.20; affected 5.4.205 before 5.5; affected 5.17.5 before 5.18
Linux / Linuxaffected 5.18; unaffected 0 before 5.18; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.