CVE-2026-43115srcu: Use irq_work to start GP in tiny SRCU
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: srcu: Use irq_work to start GP in tiny SRCU Tiny SRCU's srcu_gp_start_if_needed() directly calls schedule_work(), which acquires the workqueue pool->lock. This causes a lockdep splat when call_srcu() is called with a scheduler lock held, due to: call_srcu() [holding pi_lock] srcu_gp_start_if_needed() schedule_work() -> pool->lock workqueue_init() / create_worker() [holding pool->lock] wake_up_process() -> try_to_wake_up() -> pi_lock Also add irq_work_sync() to cleanup_srcu_struct() to prevent a use-after-free if a queued irq_work fires after cleanup begins. Tested with rcutorture SRCU-T and no lockdep warnings. [ Thanks to Boqun for similar fix in patch "rcu: Use an intermediate irq_work to start process_srcu()" ]
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d8be81735aa89413b333de488251f0e64e2be591 before 28768bc7ea0b13f558a70f63cc3cfcd32d55d488; from d8be81735aa89413b333de488251f0e64e2be591 before bb37286db65368cb72ba8757ad86299c4e4a73fc; from d8be81735aa89413b333de488251f0e64e2be591 before a6fc88b22bc8d12ad52e8412c667ec0f5bf055af | CNA record |
linux linux_kernel linux:linux_kernel | from 4.12 before 6.19.14; 7.0; 7.0; 7.0; 7.0; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/28768bc7ea0b13f558a70f63cc3cfcd32d55d488
- https://git.kernel.org/stable/c/bb37286db65368cb72ba8757ad86299c4e4a73fcpatch
- https://git.kernel.org/stable/c/a6fc88b22bc8d12ad52e8412c667ec0f5bf055afpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.