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>

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Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
da765a2f599304a81a25e77908d1790414ecdbb6 affected < b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd
da765a2f599304a81a25e77908d1790414ecdbb6 affected < 71ddb7defc442ab38c53123c384fedbfd8410a15
da765a2f599304a81a25e77908d1790414ecdbb6 affected < e1ed678855e315f90c70c1723e94157a9a82e660
da765a2f599304a81a25e77908d1790414ecdbb6 affected < 67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a
da765a2f599304a81a25e77908d1790414ecdbb6 affected < 4406942e65ca128c56c67443832988873c21d2e9
Linux Linux affected
Version Status Constraints
5.5 affected —
0 unaffected < 5.5
6.6.141 unaffected ≤ 6.6.*
6.12.91 unaffected ≤ 6.12.*
6.18.33 unaffected ≤ 6.18.*
7.0.10 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

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https://git.kernel.org/stable/c/4406942e65ca128c56c67443832988873c21d2e9 cve-icon
https://git.kernel.org/stable/c/67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a cve-icon
https://git.kernel.org/stable/c/71ddb7defc442ab38c53123c384fedbfd8410a15 cve-icon
https://git.kernel.org/stable/c/b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd cve-icon
https://git.kernel.org/stable/c/e1ed678855e315f90c70c1723e94157a9a82e660 cve-icon
History

Wed, 24 Jun 2026 17:15:00 +0000

Type Values Removed Values Added
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>
Title bpf: Fix RCU stall in bpf_fd_array_map_clear()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-24T16:30:23.568Z

Reserved: 2026-06-09T07:44:35.383Z

Link: CVE-2026-53083

cve-icon Vulnrichment

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