vulnerability
Ubuntu: (CVE-2025-21817): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:L/Au:S/C:N/I:C/A:C) | Feb 27, 2025 | Jun 26, 2025 | Mar 27, 2026 |
Severity
6
CVSS
(AV:L/AC:L/Au:S/C:N/I:C/A:C)
Published
Feb 27, 2025
Added
Jun 26, 2025
Modified
Mar 27, 2026
Description
In the Linux kernel, the following vulnerability has been resolved:
block: mark GFP_NOIO around sysfs ->store()
sysfs ->store is called with queue freezed, meantime we have several
->store() callbacks(update_nr_requests, wbt, scheduler) to allocate
memory with GFP_KERNEL which may run into direct reclaim code path,
then potential deadlock can be caused.
Fix the issue by marking NOIO around sysfs ->store()
Solution
no-fix-ubuntu-package
References
- CVE-2025-21817
- https://attackerkb.com/topics/CVE-2025-21817
- CWE-667
- EUVD-EUVD-2025-5983
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-5983
- https://git.kernel.org/linus/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c
- https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31
- https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c
- https://www.cve.org/CVERecord?id=CVE-2025-21817
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