CVE-2025-21694
- Source
- https://cve.org/CVERecord?id=CVE-2025-21694
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21694.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21694
- Downstream
- Published
- 2025-02-12T13:27:53.763Z
- Modified
- 2026-03-09T23:57:08.489250Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- fs/proc: fix softlockup in __read_vmcore (part 2)
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
fs/proc: fix softlockup in _readvmcore (part 2)
Since commit 5cbcb62dddf5 ("fs/proc: fix softlockup in __read_vmcore") the number of softlockups in _readvmcore at kdump time have gone down, but they still happen sometimes.
In a memory constrained environment like the kdump image, a softlockup is not just a harmless message, but it can interfere with things like RCU freeing memory, causing the crashdump to get stuck.
The second loop in _readvmcore has a lot more opportunities for natural sleep points, like scheduling out while waiting for a data write to happen, but apparently that is not always enough.
Add a cond_resched() to the second loop in _readvmcore to (hopefully) get rid of the softlockups.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21694.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/649b266606bc413407ce315f710c8ce8a88ee30a
- https://git.kernel.org/stable/c/65c367bd9d4f43513c7f837df5753bea9561b836
- https://git.kernel.org/stable/c/80828540dad0757b6337c6561d49c81038f38d87
- https://git.kernel.org/stable/c/80da29deb88a3a907441fc35bb7bac309f31e713
- https://git.kernel.org/stable/c/84c4ed15626574c9ac6c1039ba9c137a77bcc7f2
- https://git.kernel.org/stable/c/a5a2ee8144c3897d37403a69118c3e3dc5713958
- https://git.kernel.org/stable/c/cbc5dde0a461240046e8a41c43d7c3b76d5db952
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21694.json
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-21694
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
-
Introduced803d5a33d5ffdc2d86dcc0cfa01655a330612cdbFixed84c4ed15626574c9ac6c1039ba9c137a77bcc7f2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced70c1835e776c8447c1aca87ddb38cfe764fe756aFixed80da29deb88a3a907441fc35bb7bac309f31e713
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede1b160a50c756e0efbea290b9bf5117cb80e8c4bFixed649b266606bc413407ce315f710c8ce8a88ee30a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda373ad833a6bfe4bc6cedcf7e56a99cc6fd9a193Fixed65c367bd9d4f43513c7f837df5753bea9561b836
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced518fbd644dabb6aedbdd4939c6c9cc1bf651459fFixeda5a2ee8144c3897d37403a69118c3e3dc5713958
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5cbcb62dddf5346077feb82b7b0c9254222d3445Fixed80828540dad0757b6337c6561d49c81038f38d87Fixedcbc5dde0a461240046e8a41c43d7c3b76d5db952
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast affected7bdf1d550ddfcd9ab797087421f77b7aceddc8a7Last affectede8780e8a0e25dc4c3927f611ec8970d26c0c7369