Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.16 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2021-4155MitigationThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2034813Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=98Mailing ListPatchVendor Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-4155Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/01/10/1Mailing ListPatchThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-4155MitigationThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2034813Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=98Mailing ListPatchVendor Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-4155Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/01/10/1Mailing ListPatchThird Party Advisory
FAQ
What is CVE-2021-4155?
CVE-2021-4155 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 f...
How severe is CVE-2021-4155?
CVE-2021-4155 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4155?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.