UBUNTU-CVE-2024-42250
In the Linux kernel, the following vulnerability has been resolved: cachefiles: add missing lock protection when polling Add missing lock protection in poll routine when iterating xarray, otherwise: Even with RCU read lock held, only the slot of the radix tree is ensured to be pinned there, while the data structure (e.g. struct cachefiles_req) stored in the slot has no such guarantee. The poll routine will iterate the radix tree and dereference cachefiles_req accordingly. Thus RCU read lock is not adequate in this case and spinlock is needed here.
02 / AFFECTED SOFTWARE
Affected packages
4 explicit affected versions
23 explicit affected versions
16 explicit affected versions
21 explicit affected versions
16 explicit affected versions
10 explicit affected versions
14 explicit affected versions
7 explicit affected versions
12 explicit affected versions
12 explicit affected versions
26 explicit affected versions
13 explicit affected versions
14 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
12 explicit affected versions
29 explicit affected versions
13 explicit affected versions
6 explicit affected versions
7 explicit affected versions
33 explicit affected versions
7 explicit affected versions
1 explicit affected versions
11 explicit affected versions
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
19 explicit affected versions
6 explicit affected versions
12 explicit affected versions
10 explicit affected versions
37 explicit affected versions
13 explicit affected versions
5 explicit affected versions
10 explicit affected versions
12 explicit affected versions
7 explicit affected versions
7 explicit affected versions
13 explicit affected versions
9 explicit affected versions
35 explicit affected versions
18 explicit affected versions
12 explicit affected versions
13 explicit affected versions
23 explicit affected versions
10 explicit affected versions
12 explicit affected versions
7 explicit affected versions
12 explicit affected versions
10 explicit affected versions
26 explicit affected versions
14 explicit affected versions
5 explicit affected versions
15 explicit affected versions
13 explicit affected versions
14 explicit affected versions
16 explicit affected versions
15 explicit affected versions
3 explicit affected versions
51 explicit affected versions
12 explicit affected versions
12 explicit affected versions
27 explicit affected versions
8 explicit affected versions
8 explicit affected versions
5 explicit affected versions
8 explicit affected versions
10 explicit affected versions
11 explicit affected versions
13 explicit affected versions
13 explicit affected versions
7 explicit affected versions
10 explicit affected versions
12 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
37 explicit affected versions
15 explicit affected versions
14 explicit affected versions
38 explicit affected versions
9 explicit affected versions
11 explicit affected versions
6 explicit affected versions
7 explicit affected versions
4 explicit affected versions
13 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
10 explicit affected versions
14 explicit affected versions
4 explicit affected versions
1 explicit affected versions
8 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: cachefiles: add missing lock protection when polling Add missing lock protection in poll routine when iterating xarray, otherwise: Even with RCU read lock held, only the slot of the radix tree is ensured to be pinned there, while the data structure (e.g. struct cachefiles_req) stored in the slot has no such guarantee. The poll routine will iterate the radix tree and dereference cachefiles_req accordingly. Thus RCU read lock is not adequate in this case and spinlock is needed here.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/cf5bb09e742a9cf6349127e868329a8f69b7a014
- https://git.kernel.org/stable/c/6bb6bd3dd6f382dfd36220d4b210a0c77c066651
- https://git.kernel.org/stable/c/8eadcab7f3dd809edbe5ae20533ff843dfea3a07
- https://git.kernel.org/stable/c/97cfd5e20ddc2e33e16ce369626ce76c9a475fd7
- https://git.kernel.org/stable/c/cf5bb09e742a9cf6349127e868329a8f69b7a014
- https://ubuntu.com/security/CVE-2024-42250
- https://ubuntu.com/security/notices/USN-7089-1
- https://ubuntu.com/security/notices/USN-7089-2
- https://ubuntu.com/security/notices/USN-7089-3
- https://ubuntu.com/security/notices/USN-7089-4
- https://ubuntu.com/security/notices/USN-7089-5
- https://ubuntu.com/security/notices/USN-7089-6
- https://ubuntu.com/security/notices/USN-7089-7
- https://ubuntu.com/security/notices/USN-7090-1
- https://ubuntu.com/security/notices/USN-7095-1
- https://ubuntu.com/security/notices/USN-7156-1
- https://www.cve.org/CVERecord?id=CVE-2024-42250