5.5

CVE-2024-40922: io_uring/rsrc: don't lock while !TASK_RUNNING

Analyzed
AliasesUBUNTU-CVE-2024-40922DEBIAN-CVE-2024-40922
Published 12-07-2024Last modified 11-05-2026

Vulnerability summary

CVE-2024-40922 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 12
RHSA-2024:9315SUSE-SU-2024:3194-1SUSE-SU-2024:3195-1SUSE-SU-2024:3383-1SUSE-SU-2025:20044-1SUSE-SU-2025:20047-1

Timeline

  1. 12-07-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/rsrc: don't lock while !TASK_RUNNING There is a report of io_rsrc_ref_quiesce() locking a mutex while not TASK_RUNNING, which is due to forgetting restoring the state back after io_run_task_work_sig() and attempts to break out of the waiting loop. do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff815d2494>] prepare_to_wait+0xa4/0x380 kernel/sched/wait.c:237 WARNING: CPU: 2 PID: 397056 at kernel/sched/core.c:10099 __might_sleep+0x114/0x160 kernel/sched/core.c:10099 RIP: 0010:__might_sleep+0x114/0x160 kernel/sched/core.c:10099 Call Trace: <TASK> __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0xb4/0x940 kernel/locking/mutex.c:752 io_rsrc_ref_quiesce+0x590/0x940 io_uring/rsrc.c:253 io_sqe_buffers_unregister+0xa2/0x340 io_uring/rsrc.c:799 __io_uring_register io_uring/register.c:424 [inline] __do_sys_io_uring_register+0x5b9/0x2400 io_uring/register.c:613 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd8/0x270 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6f/0x77

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu92 products
  • linux< 6.8.0-44.44
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1015.16
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f, < 0c9df3df0c888d9ec8d11a68474a4aa04d371cff | ≥ 4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f, < 4429c6c77e176a4c5aa7a3bbd1632f9fc0582518 | ≥ 4ea15b56f0810f0d8795d475db1bb74b3a7c1b2f, < 54559642b96116b45e4b5ca7fd9f7835b8561272 | 6.4
  • linux_kernel≥ 6.4, < 6.6.35 | ≥ 6.7, < 6.9.6 | 6.10:rc1 | 6.10:rc2 | 6.10:rc3
Debian1 product
  • linux< 6.9.7-1

3 vendors · 95 products

References

14 links
Show all 14 references