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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-63926 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: sockmap: fix tail fragment offset in bpf_msg_push_data When bpf_msg_push_data() inserts data in the middle of a scatterlist entry, it splits the original entry into a left fragment and a right fragment. The right fragment offset is page-local, but the code advances it with `start`, which is the message-global insertion point. For inserts into a non-first SG entry, this over-advances the offset and leaves the split layout inconsistent. Advance the right fragment offset by the fragment-local delta, `start - offset`, which matches the length removed from the front of the original entry.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/3075c21d2d76c0067f4a382765b43d6cc10470f1 kernel.org
https://git.kernel.org/stable/c/5e19028667963fb371ebb00cecc2a473ef92056b kernel.org
https://git.kernel.org/stable/c/63f64a510c7917658ddf4d073ece73914ee25346 kernel.org
https://git.kernel.org/stable/c/96b72672ce849a1402730238e64d9b20bf06a96d kernel.org
https://git.kernel.org/stable/c/aeb95146848d12206e1b2cfacd4f40e21ce81d94 kernel.org
https://git.kernel.org/stable/c/d81b323af2dcee47573907ccb89c0df9b45cb2e2 kernel.org
https://git.kernel.org/stable/c/f14609d8146707452e0822f3c8154674ce677251 kernel.org
https://git.kernel.org/stable/c/f72eed9b84fb771019a955908132410a9ba9ea3f kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-63926
NVD Published Date:
07/19/2026
NVD Last Modified:
07/20/2026
Source:
kernel.org