CVE-2021-4155

Description

A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79

https://access.redhat.com/security/cve/CVE-2021-4155

https://www.openwall.com/lists/oss-security/2022/01/10/1

https://security-tracker.debian.org/tracker/CVE-2021-4155

https://bugzilla.redhat.com/show_bug.cgi?id=2034813

Details