Description
In the Linux kernel, the following vulnerability has been resolved:

xfs: bail out on bitmap errors in xrep_agfl_fill

LOLLM also points out that the xagb_bitmap_set call in xrep_agfl_fill
can fail, but we don't check the result of xagb_bitmap_walk, so we
silently drop the error and proceed with inconsistent incore data.
That shouldn't be allowed.
Published: 2026-09-25
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Kernel Data Integrity Violation
Action: Update Kernel
AI Analysis

Impact

An unchecked return value in the XFS bitmap handling routine xrep_agfl_fill causes the kernel to silently continue with corrupted in‑core data when creating allocation group free lists. The bug allows a caller to induce the routine to act on an unrecoverable bitmap error without any notification, resulting in inconsistent and unreliable filesystem state. This vulnerability threatens the integrity of the filesystem and can lead to data loss or a denial‑of‑service condition if exploited within the kernel.

Affected Systems

All Linux kernel builds that include the XFS filesystem module are affected. The issue resides specifically in the XFS bitmap handling routine xrep_agfl_fill within the kernel source.

Risk and Exploitability

The CVSS score of 5.5 indicates moderate severity. The EPSS score of < 1% suggests a low probability of exploitation and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector is local and requires privileged code execution or manipulation of the XFS filesystem; successful exploitation could corrupt allocation group data, leading to data integrity loss or potential denial of service.

Generated by OpenCVE AI on October 1, 2026 at 13:44 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Linux kernel update that contains the XFS bug fix
  • Reboot the system to load the new kernel and ensure the patch is active
  • Run XFS fsck on all affected filesystems to detect and correct any pre‑existing corruption

Generated by OpenCVE AI on October 1, 2026 at 13:44 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4817-1 linux-6.12 security update
Debian DSA Debian DSA DSA-6528-1 linux security update
History

Sat, 03 Oct 2026 11:15:00 +0000

Type Values Removed Values Added
References

Thu, 01 Oct 2026 11:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-665
CWE-778

Tue, 29 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-252
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Low

Fri, 25 Sep 2026 23:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-665
CWE-778

Fri, 25 Sep 2026 10:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: xfs: bail out on bitmap errors in xrep_agfl_fill LOLLM also points out that the xagb_bitmap_set call in xrep_agfl_fill can fail, but we don't check the result of xagb_bitmap_walk, so we silently drop the error and proceed with inconsistent incore data. That shouldn't be allowed.
Title xfs: bail out on bitmap errors in xrep_agfl_fill
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-10-19T09:09:04.449Z

Reserved: 2026-09-24T16:01:01.154Z

Link: CVE-2026-97542

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-25T11:17:04.540

Modified: 2026-10-19T10:17:23.253

Link: CVE-2026-97542

cve-icon Redhat

Severity : Low

Publid Date: 2026-09-25T00:00:00Z

Links: CVE-2026-97542 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T13:45:06Z

Weaknesses