CVE-2021-4155
MEDIUM
5.5
CVSS Score
Published: August 24, 2022 at 03:10 PM UTC
Updated: June 17, 2026 at 04:19 AM UTC
2 products affected across 2 vendorsLinux KernelKernel
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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 5.16
Affected range stops below 5.16, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (5)
x_refsource_MISCMitigationThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2021-4155x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2034813x_refsource_MISCMailing ListPatchVendor Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79x_refsource_MISCThird Party Advisory
Source: [email protected]
https://security-tracker.debian.org/tracker/CVE-2021-4155x_refsource_MISCMailing ListPatchThird Party Advisory
Source: [email protected]
https://www.openwall.com/lists/oss-security/2022/01/10/1CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-131
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