srcu: Use irq_work to start GP in tiny SRCU
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()" ]
CVE-2026-43115
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-43115
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "d8be81735aa89413b333de488251f0e64e2be591",
"lessThan": "20b98d9ffb09763048a7c84b47403eb0f177272c",
"versionType": "git"
},
{
"status": "affected",
"version": "d8be81735aa89413b333de488251f0e64e2be591",
"lessThan": "2127e6b79d9d579ea538a350d1bbe859e39814d5",
"versionType": "git"
},
{
"status": "affected",
"version": "d8be81735aa89413b333de488251f0e64e2be591",
"lessThan": "28768bc7ea0b13f558a70f63cc3cfcd32d55d488",
"versionType": "git"
},
{
"status": "affected",
"version": "d8be81735aa89413b333de488251f0e64e2be591",
"lessThan": "bb37286db65368cb72ba8757ad86299c4e4a73fc",
"versionType": "git"
},
{
"status": "affected",
"version": "d8be81735aa89413b333de488251f0e64e2be591",
"lessThan": "a6fc88b22bc8d12ad52e8412c667ec0f5bf055af",
"versionType": "git"
}
],
"programFiles": [
"include/linux/srcutiny.h",
"kernel/rcu/srcutiny.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.14",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/srcutiny.h",
"kernel/rcu/srcutiny.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43115
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46260 · Revision 1
- Added to Heist Feed
- Publisher date