Vulnerability in Linux Kernel
CVE-2021-4155
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.
EPSS: 0.003 (20.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Linux Linux_kernel
- N/a Kernel — versions Fixed in Kernel v5.16
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Mitigation)
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (Patch, Mailing List, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-4155?
- CVE-2021-4155 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Calculation of Buffer Size. CVSS score: 5.5/10. Published 2022-08-24.
- How severe is CVE-2021-4155?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-4155 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.