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CVE Record

CVE-2026-23252: xfs: get rid of the xchk_xfile_*_descr calls

In the Linux kernel, the following vulnerability has been resolved: xfs: get rid of the xchk_xfile_*_descr calls The xchk_xfile_*_descr macros call kasprintf, which can fail to allocate memory if the formatted string is larger than 16 bytes (or whatever the nofail guarantees are nowadays). Some of them could easily exceed that, and Jiaming Zhang found a few places where that can happen with syzbot. The descriptions are debugging aids and aren't required to be unique, so let's just pass in static strings and eliminate this path to failure. Note this patch touches a number of commits, most of which were merged between 6.6 and 6.14.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2026-23252 is a Linux kernel XFS issue where optional debugging descriptions could trigger a memory-allocation failure. The fix replaces formatted descriptions with static strings. Business risk is unclear because the source bundle provides no CVSS score, impact class, or exploitation evidence.

Executive priority

Treat as a kernel hygiene update, not an emergency based on current evidence. Prioritize normal kernel patch cycles, with faster handling for XFS-heavy infrastructure or internet-facing multi-tenant hosts.

Technical view

In XFS online scrub code, xchk_xfile_*_descr macros used kasprintf for description strings. Oversized formatted strings could exceed allocation guarantees and fail, as found by syzbot. The kernel fix removes that failure path by using non-unique static strings.

Likely exposure

Exposure likely concerns Linux systems running affected kernels with XFS code paths present. The bundle lists Linux kernel versions but does not provide clear distro package ranges or CPEs, so asset-level exposure requires vendor mapping.

Exploitation context

The bundle says KEV is false and provides no cited evidence of active exploitation. The finding came from syzbot. No public exploit status, attacker prerequisites, or practical impact details are provided in the supplied sources.

Researcher notes

The source bundle lacks CVSS, CWE, and concrete impact beyond allocation failure. Review the stable commits and downstream advisories to determine whether the issue is denial-of-service only and which maintained kernel branches received backports.

Mitigation direction

  • Apply Linux kernel or distro updates carrying the referenced stable commits.
  • Prioritize hosts using XFS or kernel versions mapped to the affected ranges.
  • Check Linux distribution advisories for backported fixes and package-specific guidance.
  • Avoid inventing local workarounds unless your vendor recommends them.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and container hosts.
  • Identify systems using XFS filesystems or XFS scrub functionality.
  • Map installed distro kernel packages to the referenced stable commits.
  • Confirm security scanners use vendor advisories, not only upstream version strings.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2026-23252 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
5Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxab97f4b1c030750f2475bf4da8a9554d02206640, ab97f4b1c030750f2475bf4da8a9554d02206640, ab97f4b1c030750f2475bf4da8a9554d02206640, ab97f4b1c030750f2475bf4da8a9554d02206640unaffected
LinuxLinux6.10, 0, 6.12.78, 6.18.16, 6.19.6, 7.0affected
Weakness

CWE details

No CWE listed

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