PT-2026-43822 · Linux · Linux

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-45955

Mitre

In the Linux kernel, the following vulnerability has been resolved:

md/md-llbitmap: fix percpu ref not resurrected on suspend timeout

When llbitmap suspend timeout() times out waiting for percpu ref to become zero, it returns -ETIMEDOUT without resurrecting the percpu ref. The caller (md llbitmap daemon fn) then continues to the next page without calling llbitmap resume(), leaving the percpu ref in a killed state permanently.

Fix this by resurrecting the percpu ref before returning the error, ensuring the page control structure remains usable for subsequent operations.

Related Identifiers

CVE-2026-45955

Affected Products

Linux

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-45955 · Security Note
• https://git.kernel.org/stable/c/2446d099350185caeed19ab2c0270451a97296fb · Note
• https://git.kernel.org/stable/c/d119bd2e1643cc023210ff3c6f0657e4f914e71d · Note
• https://git.kernel.org/stable/c/095417d6b669c2dec39a5842ccb94df915f97f54 · Note