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CVE Record

CVE-2026-23145: ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref

In the Linux kernel, the following vulnerability has been resolved: ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref The error branch for ext4_xattr_inode_update_ref forget to release the refcount for iloc.bh. Find this when review code.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2026-23145 is a Linux kernel ext4 filesystem bug where an error path leaks a buffer reference. The public record does not provide CVSS, CWE, impact detail, or evidence of active exploitation. Treat it as a kernel maintenance risk until your Linux distribution or kernel supplier maps it to your deployed kernels.

Executive priority

Monitor and remediate through normal kernel patch management unless vendor guidance raises severity. Current public evidence is incomplete and does not support emergency treatment.

Technical view

The issue is in ext4_xattr_inode_update_ref. The resolved change releases iloc.bh on an error branch, preventing a reference leak. The source bundle identifies Linux kernel versions and stable commits, but does not describe a privilege boundary, trigger conditions, crashability, or data impact.

Likely exposure

Exposure is limited to Linux systems running affected kernel builds with ext4 code present. Practical exposure depends on distro backports and whether deployed kernels include the referenced stable fixes.

Exploitation context

The bundle marks KEV as false and provides no cited source claiming exploitation. No exploitability details, public exploit evidence, or attacker prerequisites are included.

Researcher notes

Key gaps are impact, triggerability, and security boundary. Review the stable commits and ext4 xattr inode error handling to determine whether the leak can cause denial of service or other observable effects.

Mitigation direction

  • Check your Linux distribution advisory for CVE-2026-23145 package mapping.
  • Update kernels to vendor-provided fixed builds when available.
  • Prioritize internet-facing or multi-user Linux systems after vendor severity is known.
  • Avoid assuming upstream version numbers match distro backported fixes.

Validation and detection

  • Inventory Linux kernel versions across servers, containers hosts, and appliances.
  • Check whether each kernel includes the referenced stable ext4 fix commits.
  • Confirm filesystem exposure where ext4 is used or loaded.
  • Track vendor advisories for severity, package names, and reboot requirements.
Prepared
Confidence
medium
Sources
9

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

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CVE-2026-23145 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
1ADP providers
8Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

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.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1cfb3e4ddbdc8e02e637b8852540bd4718bf4814, 505e69f76ac497e788f4ea0267826ec7266b40c8, 3d6269028246f4484bfed403c947a114bb583631, 79ea7f3e11effe1bd9e753172981d9029133a278, 6b879c4c6bbaab03c0ad2a983953bd1410bb165e, 57295e835408d8d425bef58da5253465db3d6888, 57295e835408d8d425bef58da5253465db3d6888, ea39e712c2f5ae148ee5515798ae03523673e002, 440b003f449a4ff2a00b08c8eab9ba5cd28f3943, 5.10.246, 5.15.195, 6.1.157, 6.6.113, 6.12.54, 5.4.301, 6.17.4unaffected
LinuxLinux6.18, 0, 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7, 6.19affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.