CVE-2021-4155

low-risk
Published 2022-08-24

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (10)

Mitigation https://access.redhat.com/security/cve/CVE-2021-4155
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2034813
Mailing List https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=98...
Third Party Advisory https://security-tracker.debian.org/tracker/CVE-2021-4155
Mailing List https://www.openwall.com/lists/oss-security/2022/01/10/1
Mitigation https://access.redhat.com/security/cve/CVE-2021-4155
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2034813
Mailing List https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=98...
Third Party Advisory https://security-tracker.debian.org/tracker/CVE-2021-4155
Mailing List https://www.openwall.com/lists/oss-security/2022/01/10/1
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal