CVE-2026-53061None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: dm cache: fix dirty mapping checking in passthrough mode switching As mentioned in commit 9b1cc9f251af ("dm cache: share cache-metadata object across inactive and acti…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
dm cache: fix dirty mapping checking in passthrough mode switching
As mentioned in commit 9b1cc9f251af ("dm cache: share cache-metadata object across inactive and active DM tables"), dm-cache assumed table reload occurs after suspension, while LVM's table preload breaks this assumption. The dirty mapping check for passthrough mode was designed around this assumption and is performed during table creation, causing the check to fail with preload while metadata updates are ongoing. This risks loading dirty mappings into passthrough mode, resulting in data loss.
Reproduce steps:
dmsetup create cmeta --table "0 8192 linear /dev/sdc 0"
dmsetup create cdata --table "0 131072 linear /dev/sdc 8192"
dmsetup create corig --table "0 262144 linear /dev/sdc 262144"
dd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct
dmsetup create cache --table "0 262144 cache /dev/mapper/cmeta
/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writeback smq
2 migration_threshold 0"
dmsetup reload cache --table "0 262144 cache /dev/mapper/cmeta
/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 passthrough smq 0"
fio --filename=/dev/mapper/cache --name=populate --rw=write --bs=4k
--direct=1 --size=64k
dmsetup resume cache
Fix by moving the checks to the preresume phase to support table preloading. Also remove the unused function dm_cache_metadata_all_clean.
Linux >= 2ee57d587357f0d752af6c2e3e46434a74b1bee3 < c2e86f647561fcf5e1c6eba7d75e9e0c4299c94dLinux >= 2ee57d587357f0d752af6c2e3e46434a74b1bee3 < 5c98a3f1d7a554c9e920aa31daf92af6b5bbb8ccLinux >= 2ee57d587357f0d752af6c2e3e46434a74b1bee3 < 1443c32f24d6d8bcdf4beceef2afc09290b98717Linux >= 2ee57d587357f0d752af6c2e3e46434a74b1bee3 < 12105c7f18375d7615dad7605d89eadae7eb12a6Linux >= 2ee57d587357f0d752af6c2e3e46434a74b1bee3 < bd5a2c1018938e6b32670728bdb32a3f0efff00fLinux >= 2ee57d587357f0d752af6c2e3e46434a74b1bee3 < 21c503d60a257e54ca3ac58e2721bd24501d5bdeLinux >= 2ee57d587357f0d752af6c2e3e46434a74b1bee3 < 01b22656d8a68dbeae59f8b80866e7b11936b20aLinux >= 2ee57d587357f0d752af6c2e3e46434a74b1bee3 < 322586745bd1a0e5f3559fd1635fdeb4dbd1d6b8Linux 3.13Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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