Bug 2516475 (CVE-2026-72401) - CVE-2026-72401 kernel: bpf: Fix insn_aux_data leak on verifier err_free_env path
Summary: CVE-2026-72401 kernel: bpf: Fix insn_aux_data leak on verifier err_free_env path
Keywords:
Status: NEW
Alias: CVE-2026-72401
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-15 06:14 UTC by OSIDB Bzimport
Modified: 2026-08-18 12:54 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-08-15 06:14:29 UTC
In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix insn_aux_data leak on verifier err_free_env path

When bpf_check() allocates env->insn_aux_data successfully but later
fails to allocate env->succ, it jumps directly to err_free_env.

The existing vfree(env->insn_aux_data) sits before the err_free_env
label, so that direct jump bypasses it and leaks insn_aux_data.

Move vfree(env->insn_aux_data) into err_free_env so all early and late
exit paths release it consistently.


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