HighFix available
gfs2: Fix unlikely race in gdlm_put_lock
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix unlikely race in gdlm_put_lock In gdlm_put_lock(), there is a small window of time in which the DFL_UNMOUNT flag has been set but the lockspace hasn't been released, yet. In that window, dlm may still call gdlm_ast() and gdlm_bast(). To prevent it from dereferencing freed glock objects, only free the glock if the lockspace has actually been released.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.1.168, 6.12.56, 6.17.6, 6.6.131
- CVEs
- CVE-2025-40242
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 01:45 UTC · Revision 1
Source evidence
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix unlikely race in gdlm_put_lock In gdlm_put_lock(), there is a small window of time in which the DFL_UNMOUNT flag has been set but the lockspace hasn't been released, yet. In that window, dlm may still call gdlm_ast() and gdlm_bast(). To prevent it from dereferencing freed glock objects, only free the glock if the lockspace has actually been released.
osv:CVE-2025-40242
Kernel
Fixed versions: 6.1.168, 6.6.131, 6.12.56, 6.17.6
Complete source record
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"title": "gfs2: Fix unlikely race in gdlm_put_lock",
"summary": "In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix unlikely race in gdlm_put_lock In gdlm_put_lock(), there is a small window of time in which the DFL_UNMOUNT flag has been set but the lockspace hasn't been released, yet. In that window, dlm may still call gdlm_ast() and gdlm_bast(). To prevent it from dereferencing freed glock objects, only free the glock if the lockspace has actually been released.",
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"provider": "osv",
"references": [
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"source_id": "core-osv",
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"published_at": "2025-12-04T15:31:31.497+00:00"
}