CVE-2026-72224: nvdimm/btt: Free arenas on btt_init() error paths

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: nvdimm/btt: Free arenas on btt_init() error paths The arenas allocated by discover_arenas() or create_arenas() are not freed on some error paths in btt_init(). This leaks memory when BTT initialization fails. Call free_arenas() from the affected error paths to release the allocations. [ as: commit message and log edits ]

Affected products

Linux kernel: 4.2 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0b63788093ff6ccfffe6e87de9e08aeeb406599c
https://git.kernel.org/stable/c/1a6b6442a982d0ca5fb6a1a39b6f6dfd760eda57
https://git.kernel.org/stable/c/52a7e7ece79c4b0f406149e19cd2b4b11a6c19e4
https://git.kernel.org/stable/c/5804e6a6912b5a1e47c821777d69191d69a3fe64
https://git.kernel.org/stable/c/68c967e105d50f885e02b0dbdc9211fd5f84bdcd
https://git.kernel.org/stable/c/7e49684d90faa34ff6d5586be658e986d9d475ac
https://git.kernel.org/stable/c/9ab5293d9ac3f2c4232220e563d04701f5f44607
https://git.kernel.org/stable/c/f4ca396bdd60b4e0a665b2589bfc4ddbea9bda2b

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