Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: procfs: fix possible double mmput() in do_procmap_query() When user provides incorrectly sized buffer for build ID for PROCMAP_QUERY we return with -ENAMETOOLONG error. After recent changes this condition happens later, after we unlocked mmap_lock/per-VMA lock and did mmput(), so original goto out is now wrong and will double-mmput() mm_struct. Fix by jumping further to clean up only vm_file and name_buf.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b9b97e6aeb534315f9646b2090d1a5024c6a4e82 before f9fe092084cd04deea18747f58a2304026e76aaa; affected cbc03ce3e6ce7e21214c3f02218213574c1a2d08 before 8adaff87db143583e08eec4f4e7788f1ef8af94d; affected b5cbacd7f86f4f62b8813688c8e73be94e8e1951 before 90f5e87c9b75833b9ef3a4415b92c0247f28ab2f; affected b5cbacd7f86f4f62b8813688c8e73be94e8e1951 before 61dc9f776705d6db6847c101b98fa4f0e9eb6fa3; affected 6.12.70 before 6.12.75; affected 6.18.10 before 6.18.16 |
| Linux / Linux | affected 6.19; unaffected 0 before 6.19; unaffected 6.12.75 through 6.12.*; unaffected 6.18.16 through 6.18.*; unaffected 6.19.6 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f9fe092084cd04deea18747f58a2304026e76aaa
- https://git.kernel.org/stable/c/8adaff87db143583e08eec4f4e7788f1ef8af94d
- https://git.kernel.org/stable/c/90f5e87c9b75833b9ef3a4415b92c0247f28ab2f
- https://git.kernel.org/stable/c/61dc9f776705d6db6847c101b98fa4f0e9eb6fa3
ADP enrichment
A flaw was found in the Linux kernel's procfs component. A local user, by providing a malformed input buffer during a specific memory mapping query (PROCMAP_QUERY), can trigger an error in how the kernel manages process memory. This can lead to a double release of memory resources, potentially causing the system to crash and resulting in a denial of service (DoS).