Bug 2482134 (CVE-2026-45951) - CVE-2026-45951 kernel: bpf: Fix a potential use-after-free of BTF object
Summary: CVE-2026-45951 kernel: bpf: Fix a potential use-after-free of BTF object
Keywords:
Status: NEW
Alias: CVE-2026-45951
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-27 15:12 UTC by OSIDB Bzimport
Modified: 2026-05-28 11:29 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-05-27 15:12:57 UTC 
In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix a potential use-after-free of BTF object

Refcounting in the check_pseudo_btf_id() function is incorrect:
the __check_pseudo_btf_id() function might get called with a zero
refcounted btf. Fix this, and patch related code accordingly.

v3: rephrase a comment (AI)
v2: fix a refcount leak introduced in v1 (AI)
Comment 1 Keith Grant 2026-05-27 23:44:15 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052731-CVE-2026-45951-dc78@gregkh/T
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