CVE-2025-39745
- Source
- https://cve.org/CVERecord?id=CVE-2025-39745
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39745.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-39745
- Downstream
- Related
- Published
- 2025-09-11T16:52:18.423Z
- Modified
- 2026-02-25T09:15:35.590156093Z
- Summary
- rcutorture: Fix rcutorture_one_extend_check() splat in RT kernels
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
rcutorture: Fix rcutortureoneextend_check() splat in RT kernels
For built with CONFIGPREEMPTRT=y kernels, running rcutorture tests resulted in the following splat:
[ 68.797425] rcutortureoneextendcheck during change: Current 0x1 To add 0x1 To remove 0x0 preemptcount() 0x0 [ 68.797533] WARNING: CPU: 2 PID: 512 at kernel/rcu/rcutorture.c:1993 rcutortureoneextendcheck+0x419/0x560 [rcutorture] [ 68.797601] Call Trace: [ 68.797602] <TASK> [ 68.797619] ? lockdepsoftirqsoff+0xa5/0x160 [ 68.797631] rcutortureoneextend+0x18e/0xcc0 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c] [ 68.797646] ? localclock+0x19/0x40 [ 68.797659] rcutortureone_read+0xf0/0x280 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c] [ 68.797678] ? __pfxrcutortureoneread+0x10/0x10 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c] [ 68.797804] ? __pfxrcutorturetimer+0x10/0x10 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c] [ 68.797815] rcu-torture: rcutorturereader task started [ 68.797824] rcu-torture: Creating rcutorturereader task [ 68.797824] rcutorturereader+0x238/0x580 [rcutorture 2466dbd2ff34dbaa36049cb323a80c3306ac997c] [ 68.797836] ? kvmschedclockread+0x15/0x30
Disable BH does not change the SOFTIRQ corresponding bits in preemptcount() for RT kernels, this commit therefore use softirqcount() to check the if BH is disabled.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39745.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/69c5ae0f441c2d72e8f48dc1e08464c172360c4c
- https://git.kernel.org/stable/c/8d71351d88e478d3c4e945e3218e97ec677fd807
- https://git.kernel.org/stable/c/a85550267247cdf5e7499be00ea8e388ab014e50
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39745.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-39745
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedec9d6356bfda69abe5f4767dd56c964127913233Fixeda85550267247cdf5e7499be00ea8e388ab014e50Fixed69c5ae0f441c2d72e8f48dc1e08464c172360c4cFixed8d71351d88e478d3c4e945e3218e97ec677fd807