What’s Vulnerable › Vulnerabilities

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

• 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 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 ]

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/0b0d9404951aacc9717aa61e77af4a6e9e8f8249
• https://git.kernel.org/stable/c/13fe4cd9ddd0aacb7777812328be525a11ea3fea
• https://git.kernel.org/stable/c/2d0364937550a7b3e2592629c2a68753ac020b28
• https://git.kernel.org/stable/c/30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5
• https://git.kernel.org/stable/c/7563f69caa9143a491d5f26e563255c734751545
• https://git.kernel.org/stable/c/873ced7f345e99f7ee16f9ff226515580332ecc4
• https://git.kernel.org/stable/c/ba59b96d8d21dc8729fca44a022ca5919c1848c9
• https://git.kernel.org/stable/c/eeb95774bc79268e2b78ebf01d8781560b5bd671

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