In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate inline xattrs during inode block validation Patch series "ocfs2:… (CVE-2026-90321)
A high-severity vulnerability in the Linux kernel's OCFS2 filesystem was resolved by adding validation for inline extended attributes (xattrs) during inode block validation. The flaw allowed corrupted inline xattr metadata to be processed, potentially leading to out-of-bounds memory access and use-after-free errors. The patch ensures that xattr entry name and value bounds are checked early when reading inode blocks, preventing unsafe metadata walks by getxattr() or listxattr().
AI Analysis
Technical Summary
The vulnerability in the Linux kernel OCFS2 filesystem involved insufficient validation of inline extended attribute (xattr) entries during inode block validation. Previously, only operation-specific consumers checked xattr metadata bounds, allowing corrupted metadata to cause out-of-range array accesses and use-after-free bugs, as demonstrated by a KASAN report. The patch series "ocfs2: validate xattr entry bounds" introduces a flat xattr entry validator invoked during inode block validation, rejecting corrupted inline xattr metadata before functions like ocfs2_xattr_ibody_get() or listxattr() access it. This mitigates memory safety issues related to corrupted xattr metadata.
Potential Impact
Exploitation of this vulnerability could lead to memory corruption issues such as use-after-free, potentially causing system crashes or arbitrary code execution with kernel privileges. The CVSS score of 7.8 reflects high impact on confidentiality, integrity, and availability. However, no known exploits in the wild have been reported.
Mitigation Recommendations
A patch series has been released that adds validation of inline xattr entry bounds during inode block validation in OCFS2. Applying this official fix will prevent the vulnerability. Since this is a Linux kernel vulnerability, users should update to a kernel version that includes this patch. No additional mitigation steps are indicated by the vendor advisory.
In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate inline xattrs during inode block validation Patch series "ocfs2:… (CVE-2026-90321)
Description
A high-severity vulnerability in the Linux kernel's OCFS2 filesystem was resolved by adding validation for inline extended attributes (xattrs) during inode block validation. The flaw allowed corrupted inline xattr metadata to be processed, potentially leading to out-of-bounds memory access and use-after-free errors. The patch ensures that xattr entry name and value bounds are checked early when reading inode blocks, preventing unsafe metadata walks by getxattr() or listxattr().
CVSS v3.1
Score 7.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel OCFS2 filesystem involved insufficient validation of inline extended attribute (xattr) entries during inode block validation. Previously, only operation-specific consumers checked xattr metadata bounds, allowing corrupted metadata to cause out-of-range array accesses and use-after-free bugs, as demonstrated by a KASAN report. The patch series "ocfs2: validate xattr entry bounds" introduces a flat xattr entry validator invoked during inode block validation, rejecting corrupted inline xattr metadata before functions like ocfs2_xattr_ibody_get() or listxattr() access it. This mitigates memory safety issues related to corrupted xattr metadata.
Potential Impact
Exploitation of this vulnerability could lead to memory corruption issues such as use-after-free, potentially causing system crashes or arbitrary code execution with kernel privileges. The CVSS score of 7.8 reflects high impact on confidentiality, integrity, and availability. However, no known exploits in the wild have been reported.
Mitigation Recommendations
A patch series has been released that adds validation of inline xattr entry bounds during inode block validation in OCFS2. Applying this official fix will prevent the vulnerability. Since this is a Linux kernel vulnerability, users should update to a kernel version that includes this patch. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-wp5h-rffw-rh8w
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90321"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6aade51e55bf5e2cf5edc168
Added to database: 09/19/2026, 01:27:58 UTC
Last enriched: 09/19/2026, 01:48:22 UTC
Last updated: 09/19/2026, 01:48:22 UTC
Views: 2
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