PT-2025-49670 · Linux+1 · Linux Kernel+1
Published
2025-12-09
·
Updated
2025-12-10
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CVE-2023-53810
None
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Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A flaw exists in the Linux kernel’s block layer related to the handling of cryptographic keyslots during I/O completion. Specifically, the
blk crypto put keyslot() function is called after upper layers are notified of I/O completion via bio endio(). This timing issue can lead to a race condition where blk crypto evict key() may incorrectly observe a non-zero slot refs count, potentially resulting in a use-after-free condition within the blk crypto reprogram all keys() function. This issue is most likely to occur when per-file keys are used with fscrypt. The fix involves releasing the keyslot before bio endio() is called.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Related Identifiers
Affected Products
Linux Kernel
Red Hat