bpf,fork: wipe ->bpf_storage before bailouts that access it

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72110
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:25 UTC
Updated2026-08-17 06:18:10 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bpf,fork: wipe ->bpf_storage before bailouts that access it Currently, copy_process() can bail out to free_task() before p->bpf_storage has been initialized, with this call graph (shown here for the !CONFIG_MEMCG case): copy_process dup_task_struct arch_dup_task_struct [copies the entire task_struct, including ->bpf_storage member] [RLIMIT_NPROC check fails] delayed_free_task free_task bpf_task_storage_free rcu_dereference(task->bpf_storage) bpf_local_storage_destroy In this case, the nascent task's ->bpf_storage member that bpf_local_storage_destroy() operates on is a plain copy of the parent's ->bpf_storage pointer, not a real initialized pointer. This leads to badness (kernel hangs, UAF). This is reachable as long as the process calling fork() has been inserted into a task storage map.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001630000 probability, percentile 0.060350000 (date 2026-08-17)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a10787e6d58c24b51e91c19c6d16c5da89fcaa4b c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74 git Not specified
CNA Linux Linux affected a10787e6d58c24b51e91c19c6d16c5da89fcaa4b 9cff220ddb65b022cc668bb652200742476e744c git Not specified
CNA Linux Linux affected a10787e6d58c24b51e91c19c6d16c5da89fcaa4b c4f626ddf2350652ad2f79daf1f10847f3f6eabd git Not specified
CNA Linux Linux affected a10787e6d58c24b51e91c19c6d16c5da89fcaa4b 43f0005f81b8ce3be962d653cde8db9022f1e9b0 git Not specified
CNA Linux Linux affected a10787e6d58c24b51e91c19c6d16c5da89fcaa4b 9b51a6155d14389876916726430da30eabb1d4ed git Not specified
CNA Linux Linux affected 5.13 Not specified
CNA Linux Linux unaffected 5.13 semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/43f0005f81b8ce3be962d653cde8db9022f1e9b0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9cff220ddb65b022cc668bb652200742476e744c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9b51a6155d14389876916726430da30eabb1d4ed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c4f626ddf2350652ad2f79daf1f10847f3f6eabd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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