PT-2026-52367 · Linux · Linux

Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-53272

Mitre

In the Linux kernel, the following vulnerability has been resolved:

erofs: fix use-after-free on sbi->sync decompress

z erofs decompress kickoff() can race with filesystem unmount, causing a use-after-free on sbi->sync decompress.

When I/O completes, z erofs endio() calls z erofs decompress kickoff() to queue z erofs decompressqueue work() asynchronously. Then, after all folios are unlocked, unmount workflow can proceed and sbi will be freed before accessing to sbi->sync decompress.

Thread (unmount) I/O completion kworker queue work z erofs decompressqueue work (all folios are unlocked) cleanup mnt .. erofs kill sb erofs sb free kfree(sbi) access sbi->sync decompress // UAF!!

Related Identifiers

CVE-2026-53272

Affected Products

Linux

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-53272 · Security Note
• https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba · Note
• https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070 · Note
• https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296 · Note
• https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea · Note