CVE-2025-21694 (GCVE-0-2025-21694)
Vulnerability from cvelistv5
Published
2025-02-12 13:27
Modified
2026-05-23 15:56
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/proc: fix softlockup in __read_vmcore (part 2) Since commit 5cbcb62dddf5 ("fs/proc: fix softlockup in __read_vmcore") the number of softlockups in __read_vmcore 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 __read_vmcore 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 __read_vmcore to (hopefully) get rid of the softlockups.
References
Impacted products
Vendor Product Version
Linux Linux Version: 803d5a33d5ffdc2d86dcc0cfa01655a330612cdb
Version: 70c1835e776c8447c1aca87ddb38cfe764fe756a
Version: e1b160a50c756e0efbea290b9bf5117cb80e8c4b
Version: a373ad833a6bfe4bc6cedcf7e56a99cc6fd9a193
Version: 518fbd644dabb6aedbdd4939c6c9cc1bf651459f
Version: 5cbcb62dddf5346077feb82b7b0c9254222d3445
Version: 5cbcb62dddf5346077feb82b7b0c9254222d3445
Version: 7bdf1d550ddfcd9ab797087421f77b7aceddc8a7
Version: e8780e8a0e25dc4c3927f611ec8970d26c0c7369
Version: 5.4.279   ≤
Version: 5.10.221   ≤
Version: 5.15.162   ≤
Version: 6.1.95   ≤
Version: 6.6.35   ≤
Version: 4.19.317   ≤
Version: 6.9.6   ≤
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