CVE-2026-93198dm-pcache: validate the persisted dirty_tail chain at load
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: dm-pcache: validate the persisted dirty_tail chain at load The writeback worker follows the persisted dirty_tail chain, which is decoded from the cache device independently of the key_tail chain that cache_replay() walks and bounds. A crafted image, whose on-media fields are authenticated only by a crc32c with a fixed seed, can aim dirty_tail at a chain of last ksets that never terminates, so cache_writeback_fn() re-arms itself with no delay forever. Walk the dirty_tail chain once at load with the same hop cap cache_replay() uses and fail the table load with -EIO if it does not reach an end within n_segs hops.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 before 8195cf3f4a82ef49d9b0651c507ed0784caf23fb; from 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 before 4822a030929e0e77aa380722dc42e3e4c9edd346; from 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 before 58d620ee9e01d4bdbceaf2ae1450d307a2a9d58b | CNA record |
References
- https://git.kernel.org/stable/c/8195cf3f4a82ef49d9b0651c507ed0784caf23fb
- https://git.kernel.org/stable/c/4822a030929e0e77aa380722dc42e3e4c9edd346
- https://git.kernel.org/stable/c/58d620ee9e01d4bdbceaf2ae1450d307a2a9d58b
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.