{"id":"DEBIAN-CVE-2023-53536","details":"In the Linux kernel, the following vulnerability has been resolved:  blk-crypto: make blk_crypto_evict_key() more robust  If blk_crypto_evict_key() sees that the key is still in-use (due to a bug) or that -\u003ekeyslot_evict failed, it currently just returns while leaving the key linked into the keyslot management structures.  However, blk_crypto_evict_key() is only called in contexts such as inode eviction where failure is not an option.  So actually the caller proceeds with freeing the blk_crypto_key regardless of the return value of blk_crypto_evict_key().  These two assumptions don't match, and the result is that there can be a use-after-free in blk_crypto_reprogram_all_keys() after one of these errors occurs.  (Note, these errors *shouldn't* happen; we're just talking about what happens if they do anyway.)  Fix this by making blk_crypto_evict_key() unlink the key from the keyslot management structures even on failure.  Also improve some comments.","modified":"2026-09-15T09:02:45.789928540Z","published":"2025-10-04T16:15:48.580Z","upstream":["CVE-2023-53536"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53536"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.37-1"}]}],"versions":["6.1.27-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53536.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53536.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53536.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}