bpf: Fix RCU stall in bpf_fd_array_map_clear()
Summary
| CVE | CVE-2026-53083 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2026-06-24 17:17:22 UTC |
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| Updated | 2026-06-24 17:17:22 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix RCU stall in bpf_fd_array_map_clear()
Add a missing cond_resched() in bpf_fd_array_map_clear() loop.
For PROG_ARRAY maps with many entries this loop calls
prog_array_map_poke_run() per entry which can be expensive, and
without yielding this can cause RCU stalls under load:
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 30932 Comm: kworker/0:2 Not tainted 6.14.0-13195-g967e8def1100 #2 PREEMPT(undef)
Workqueue: events prog_array_map_clear_deferred
RIP: 0010:write_comp_data+0x38/0x90 kernel/kcov.c:246
Call Trace:
<TASK>
prog_array_map_poke_run+0x77/0x380 kernel/bpf/arraymap.c:1096
__fd_array_map_delete_elem+0x197/0x310 kernel/bpf/arraymap.c:925
bpf_fd_array_map_clear kernel/bpf/arraymap.c:1000 [inline]
prog_array_map_clear_deferred+0x119/0x1b0 kernel/bpf/arraymap.c:1141
process_one_work+0x898/0x19d0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x770/0x10b0 kernel/workqueue.c:3400
kthread+0x465/0x880 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x19/0x30 arch/x86/entry/entry_64.S:245
</TASK> |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected da765a2f599304a81a25e77908d1790414ecdbb6 b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd git |
Not specified |
| CNA |
Linux |
Linux |
affected da765a2f599304a81a25e77908d1790414ecdbb6 71ddb7defc442ab38c53123c384fedbfd8410a15 git |
Not specified |
| CNA |
Linux |
Linux |
affected da765a2f599304a81a25e77908d1790414ecdbb6 e1ed678855e315f90c70c1723e94157a9a82e660 git |
Not specified |
| CNA |
Linux |
Linux |
affected da765a2f599304a81a25e77908d1790414ecdbb6 67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a git |
Not specified |
| CNA |
Linux |
Linux |
affected da765a2f599304a81a25e77908d1790414ecdbb6 4406942e65ca128c56c67443832988873c21d2e9 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5.5 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.5 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.141 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.91 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.33 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.0.10 7.0.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/71ddb7defc442ab38c53123c384fedbfd8410a15 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/4406942e65ca128c56c67443832988873c21d2e9 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/e1ed678855e315f90c70c1723e94157a9a82e660 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.
