VulnerabilityPublished 15 Aug 2026Updated 6 Nov 2026

CVE-2026-72223: Linux kernel · nvdimm/btt: Free arena sub-allocations on discover_arenas() error path

Affects Linux kernelSource CVE Database V5

Compare

Not known to be exploited · fixed in eeb95774bc79268e2b78ebf01d8781560b5bd671 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:04 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in eeb95774bc79268e2b78ebf01d8781560b5bd671, ba59b96d8d21dc8729fca44a022ca5919c1848c9, 7563f69caa9143a491d5f26e563255c734751545 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 5212e11fde4d40fa627668b4f2222d20db488f71, < eeb95774bc79268e2b78ebf01d8781560b5bd671	Fixed in eeb95774bc79268e2b78ebf01d8781560b5bd671
LinuxLinux	Affected ≥ 5212e11fde4d40fa627668b4f2222d20db488f71, < ba59b96d8d21dc8729fca44a022ca5919c1848c9	Fixed in ba59b96d8d21dc8729fca44a022ca5919c1848c9
LinuxLinux	Affected ≥ 5212e11fde4d40fa627668b4f2222d20db488f71, < 7563f69caa9143a491d5f26e563255c734751545	Fixed in 7563f69caa9143a491d5f26e563255c734751545
LinuxLinux	Affected ≥ 5212e11fde4d40fa627668b4f2222d20db488f71, < 873ced7f345e99f7ee16f9ff226515580332ecc4	Fixed in 873ced7f345e99f7ee16f9ff226515580332ecc4
LinuxLinux	Affected ≥ 5212e11fde4d40fa627668b4f2222d20db488f71, < 30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5	Fixed in 30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5
LinuxLinux	Affected ≥ 5212e11fde4d40fa627668b4f2222d20db488f71, < 13fe4cd9ddd0aacb7777812328be525a11ea3fea	Fixed in 13fe4cd9ddd0aacb7777812328be525a11ea3fea

Description

In the Linux kernel, the following vulnerability has been resolved: nvdimm/btt: Free arena sub-allocations on discover_arenas() error path Memory allocated by btt_freelist_init(), btt_rtt_init(), and btt_maplocks_init() is not freed on some discover_arenas() error paths. This leaks memory when arena discovery fails. Add the missing kfree() calls to release the allocations before returning an error. [ as: commit message and log edits ]

References

Community reviews

Loading reviews…