CVE-2026-31567 (GCVE-0-2026-31567)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:35 – Updated: 2026-05-23 16:05
VLAI
Title
PM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask()
Summary
In the Linux kernel, the following vulnerability has been resolved: PM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask() Commit 35e4a69b2003f ("PM: sleep: Allow pm_restrict_gfp_mask() stacking") introduced refcount-based GFP mask management that warns when pm_restore_gfp_mask() is called with saved_gfp_count == 0. Some hibernation paths call pm_restore_gfp_mask() defensively where the GFP mask may or may not be restricted depending on the execution path. For example, the uswsusp interface invokes it in SNAPSHOT_CREATE_IMAGE, SNAPSHOT_UNFREEZE, and snapshot_release(). Before the stacking change this was a silent no-op; it now triggers a spurious WARNING. Remove the WARN_ON() wrapper from the !saved_gfp_count check while retaining the check itself, so that defensive calls remain harmless without producing false warnings. [ rjw: Subject tweak ]
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d , < 3025ca5daa9d682b629c0c958b538e41deeb559d (git)
Affected: 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d , < f19d1323aa3dd7ead469aef47d9085f8939565d9 (git)
Affected: 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d , < a8d51efb5929ae308895455a3e496b5eca2cd143 (git)
Affected: 4ddf7293928cb619077724b7d828734da8181e6c (git)
Affected: 6.17.8 , < 6.18 (semver)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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}



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