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CVE Record

CVE-2026-23260: regmap: maple: free entry on mas_store_gfp() failure

In the Linux kernel, the following vulnerability has been resolved: regmap: maple: free entry on mas_store_gfp() failure regcache_maple_write() allocates a new block ('entry') to merge adjacent ranges and then stores it with mas_store_gfp(). When mas_store_gfp() fails, the new 'entry' remains allocated and is never freed, leaking memory. Free 'entry' on the failure path; on success continue freeing the replaced neighbor blocks ('lower', 'upper').

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2026-23260 is a Linux kernel memory leak. A failed internal storage operation can leave an allocated cache block unreleased. The public record does not provide CVSS, CWE, exploitability, or real-world attack evidence, so urgency depends on where affected kernel versions are deployed and vendor backport status.

Executive priority

Treat this as a patch-management item, not an emergency, unless critical systems run affected kernels and show memory pressure. No public source in the bundle supports active exploitation or a high-severity rating.

Technical view

The issue is in regmap maple cache handling. regcache_maple_write() allocates a new entry while merging adjacent ranges, then calls mas_store_gfp(). If that call fails, the new entry is not freed. The fix frees entry on the failure path while preserving existing cleanup for replaced lower and upper blocks.

Likely exposure

Exposure is limited to systems running Linux kernel versions or downstream packages that include the vulnerable regmap maple code and lack the referenced stable fixes. The CVE record lists affected Linux 6.x versions, but distro backports may change practical exposure.

Exploitation context

The source bundle does not report active exploitation, public exploit code, or CISA KEV listing. The described impact is memory leakage on an allocation/store failure path, which may matter most on long-running or memory-constrained systems if the vulnerable path is reachable.

Researcher notes

Evidence is narrow but clear: the defect is a missing free on mas_store_gfp() failure in regcache_maple_write(). Practical impact depends on reachability of that path, allocation failure conditions, and downstream kernel packaging. No exploitability details are provided.

Mitigation direction

  • Update to a vendor-supported kernel containing the referenced stable fixes.
  • Check distribution advisories for CVE-2026-23260 backport status.
  • Prioritize long-running Linux hosts where kernel memory pressure is operationally significant.
  • Monitor affected systems for unusual kernel memory growth until remediated.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and images.
  • Compare deployed kernels with the CVE record and vendor advisories.
  • Confirm whether the kernel source includes the failure-path free for entry.
  • Record distro package versions that backport the stable kernel fix.
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

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.

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CVE-2026-23260 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
LinuxLinuxf033c26de5a5734625d2dd1dc196745fae186f1b, f033c26de5a5734625d2dd1dc196745fae186f1b, f033c26de5a5734625d2dd1dc196745fae186f1b, f033c26de5a5734625d2dd1dc196745fae186f1bunaffected
LinuxLinux6.4, 0, 6.6.124, 6.12.70, 6.18.10, 6.19affected
Weakness

CWE details

No CWE listed

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