CVE-2024-41012 (GCVE-0-2024-41012)

Vulnerability from cvelistv5 – Published: 2024-07-23 08:06 – Updated: 2025-11-03 21:59
VLAI?
Title
filelock: Remove locks reliably when fcntl/close race is detected
Summary
In the Linux kernel, the following vulnerability has been resolved: filelock: Remove locks reliably when fcntl/close race is detected When fcntl_setlk() races with close(), it removes the created lock with do_lock_file_wait(). However, LSMs can allow the first do_lock_file_wait() that created the lock while denying the second do_lock_file_wait() that tries to remove the lock. Separately, posix_lock_file() could also fail to remove a lock due to GFP_KERNEL allocation failure (when splitting a range in the middle). After the bug has been triggered, use-after-free reads will occur in lock_get_status() when userspace reads /proc/locks. This can likely be used to read arbitrary kernel memory, but can't corrupt kernel memory. Fix it by calling locks_remove_posix() instead, which is designed to reliably get rid of POSIX locks associated with the given file and files_struct and is also used by filp_flush().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c293621bbf678a3d85e3ed721c3921c8a670610d , < d30ff33040834c3b9eee29740acd92f9c7ba2250 (git)
Affected: c293621bbf678a3d85e3ed721c3921c8a670610d , < dc2ce1dfceaa0767211a9d963ddb029ab21c4235 (git)
Affected: c293621bbf678a3d85e3ed721c3921c8a670610d , < 5661b9c7ec189406c2dde00837aaa4672efb6240 (git)
Affected: c293621bbf678a3d85e3ed721c3921c8a670610d , < 52c87ab18c76c14d7209646ccb3283b3f5d87b22 (git)
Affected: c293621bbf678a3d85e3ed721c3921c8a670610d , < ef8fc41cd6f95f9a4a3470f085aecf350569a0b3 (git)
Affected: c293621bbf678a3d85e3ed721c3921c8a670610d , < 5f5d0799eb0a01d550c21b7894e26b2d9db55763 (git)
Affected: c293621bbf678a3d85e3ed721c3921c8a670610d , < b6d223942c34057fdfd8f149e763fa823731b224 (git)
Affected: c293621bbf678a3d85e3ed721c3921c8a670610d , < 3cad1bc010416c6dd780643476bc59ed742436b9 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.13
Unaffected: 0 , < 2.6.13 (semver)
Unaffected: 4.19.319 , ≤ 4.19.* (semver)
Unaffected: 5.4.281 , ≤ 5.4.* (semver)
Unaffected: 5.10.223 , ≤ 5.10.* (semver)
Unaffected: 5.15.164 , ≤ 5.15.* (semver)
Unaffected: 6.1.101 , ≤ 6.1.* (semver)
Unaffected: 6.6.42 , ≤ 6.6.* (semver)
Unaffected: 6.9.9 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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This can likely be used\\nto read arbitrary kernel memory, but can\u0027t corrupt kernel memory.\\n\\nFix it by calling locks_remove_posix() instead, which is designed to\\nreliably get rid of POSIX locks associated with the given file and\\nfiles_struct and is also used by filp_flush().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: filelock: Elimina bloqueos de manera confiable cuando se detecta fcntl/close race Cuando fcntl_setlk() corre con close(), elimina el bloqueo creado con do_lock_file_wait(). Sin embargo, los LSM pueden permitir el primer do_lock_file_wait() que cre\u00f3 el bloqueo y al mismo tiempo negar el segundo do_lock_file_wait() que intenta eliminar el bloqueo. Por separado, posix_lock_file() tambi\u00e9n podr\u00eda no eliminar un bloqueo debido a un fallo en la asignaci\u00f3n de GFP_KERNEL (al dividir un rango por la mitad). 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