UBUNTU-CVE-2024-26840
In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix memory leak in cachefiles_add_cache() The following memory leak was reported after unbinding /dev/cachefiles: ================================================================== unreferenced object 0xffff9b674176e3c0 (size 192): comm "cachefilesd2", pid 680, jiffies 4294881224 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc ea38a44b): [<ffffffff8eb8a1a5>] kmem_cache_alloc+0x2d5/0x370 [<ffffffff8e917f86>] prepare_creds+0x26/0x2e0 [<ffffffffc002eeef>] cachefiles_determine_cache_security+0x1f/0x120 [<ffffffffc00243ec>] cachefiles_add_cache+0x13c/0x3a0 [<ffffffffc0025216>] cachefiles_daemon_write+0x146/0x1c0 [<ffffffff8ebc4a3b>] vfs_write+0xcb/0x520 [<ffffffff8ebc5069>] ksys_write+0x69/0xf0 [<ffffffff8f6d4662>] do_syscall_64+0x72/0x140 [<ffffffff8f8000aa>] entry_SYSCALL_64_after_hwframe+0x6e/0x76 ================================================================== Put the reference count of cache_cred in cachefiles_daemon_unbind() to fix the problem. And also put cache_cred in cachefiles_add_cache() error branch to avoid memory leaks.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
29 explicit affected versions
43 explicit affected versions
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
19 explicit affected versions
6 explicit affected versions
52 explicit affected versions
38 explicit affected versions
59 explicit affected versions
49 explicit affected versions
38 explicit affected versions
10 explicit affected versions
45 explicit affected versions
191 explicit affected versions
7 explicit affected versions
46 explicit affected versions
86 explicit affected versions
13 explicit affected versions
62 explicit affected versions
35 explicit affected versions
5 explicit affected versions
14 explicit affected versions
18 explicit affected versions
7 explicit affected versions
93 explicit affected versions
33 explicit affected versions
88 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
98 explicit affected versions
1 explicit affected versions
21 explicit affected versions
9 explicit affected versions
16 explicit affected versions
10 explicit affected versions
43 explicit affected versions
7 explicit affected versions
12 explicit affected versions
36 explicit affected versions
12 explicit affected versions
14 explicit affected versions
7 explicit affected versions
76 explicit affected versions
12 explicit affected versions
91 explicit affected versions
99 explicit affected versions
12 explicit affected versions
87 explicit affected versions
10 explicit affected versions
10 explicit affected versions
164 explicit affected versions
37 explicit affected versions
97 explicit affected versions
13 explicit affected versions
10 explicit affected versions
25 explicit affected versions
1 explicit affected versions
29 explicit affected versions
26 explicit affected versions
13 explicit affected versions
4 explicit affected versions
1 explicit affected versions
29 explicit affected versions
80 explicit affected versions
13 explicit affected versions
49 explicit affected versions
1 explicit affected versions
75 explicit affected versions
47 explicit affected versions
91 explicit affected versions
9 explicit affected versions
33 explicit affected versions
23 explicit affected versions
10 explicit affected versions
91 explicit affected versions
11 explicit affected versions
12 explicit affected versions
114 explicit affected versions
7 explicit affected versions
12 explicit affected versions
90 explicit affected versions
2 explicit affected versions
37 explicit affected versions
30 explicit affected versions
107 explicit affected versions
46 explicit affected versions
127 explicit affected versions
10 explicit affected versions
26 explicit affected versions
25 explicit affected versions
1 explicit affected versions
13 explicit affected versions
114 explicit affected versions
49 explicit affected versions
16 explicit affected versions
49 explicit affected versions
39 explicit affected versions
3 explicit affected versions
68 explicit affected versions
1 explicit affected versions
2 explicit affected versions
56 explicit affected versions
51 explicit affected versions
67 explicit affected versions
2 explicit affected versions
12 explicit affected versions
35 explicit affected versions
27 explicit affected versions
21 explicit affected versions
1 explicit affected versions
1 explicit affected versions
71 explicit affected versions
8 explicit affected versions
10 explicit affected versions
5 explicit affected versions
8 explicit affected versions
1 explicit affected versions
10 explicit affected versions
13 explicit affected versions
79 explicit affected versions
13 explicit affected versions
43 explicit affected versions
7 explicit affected versions
69 explicit affected versions
41 explicit affected versions
10 explicit affected versions
12 explicit affected versions
12 explicit affected versions
78 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
35 explicit affected versions
37 explicit affected versions
14 explicit affected versions
38 explicit affected versions
39 explicit affected versions
9 explicit affected versions
38 explicit affected versions
11 explicit affected versions
141 explicit affected versions
46 explicit affected versions
8 explicit affected versions
7 explicit affected versions
20 explicit affected versions
74 explicit affected versions
50 explicit affected versions
118 explicit affected versions
97 explicit affected versions
4 explicit affected versions
1 explicit affected versions
1 explicit affected versions
44 explicit affected versions
90 explicit affected versions
13 explicit affected versions
43 explicit affected versions
44 explicit affected versions
121 explicit affected versions
141 explicit affected versions
10 explicit affected versions
8 explicit affected versions
14 explicit affected versions
79 explicit affected versions
4 explicit affected versions
68 explicit affected versions
11 explicit affected versions
1 explicit affected versions
44 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix memory leak in cachefiles_add_cache() The following memory leak was reported after unbinding /dev/cachefiles: ================================================================== unreferenced object 0xffff9b674176e3c0 (size 192): comm "cachefilesd2", pid 680, jiffies 4294881224 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc ea38a44b): [<ffffffff8eb8a1a5>] kmem_cache_alloc+0x2d5/0x370 [<ffffffff8e917f86>] prepare_creds+0x26/0x2e0 [<ffffffffc002eeef>] cachefiles_determine_cache_security+0x1f/0x120 [<ffffffffc00243ec>] cachefiles_add_cache+0x13c/0x3a0 [<ffffffffc0025216>] cachefiles_daemon_write+0x146/0x1c0 [<ffffffff8ebc4a3b>] vfs_write+0xcb/0x520 [<ffffffff8ebc5069>] ksys_write+0x69/0xf0 [<ffffffff8f6d4662>] do_syscall_64+0x72/0x140 [<ffffffff8f8000aa>] entry_SYSCALL_64_after_hwframe+0x6e/0x76 ================================================================== Put the reference count of cache_cred in cachefiles_daemon_unbind() to fix the problem. And also put cache_cred in cachefiles_add_cache() error branch to avoid memory leaks.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/e21a2f17566cbd64926fb8f16323972f7a064444
- https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285
- https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3
- https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8
- https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58
- https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579
- https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a
- https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083
- https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444
- https://ubuntu.com/security/CVE-2024-26840
- https://ubuntu.com/security/notices/USN-6820-1
- https://ubuntu.com/security/notices/USN-6820-2
- https://ubuntu.com/security/notices/USN-6821-1
- https://ubuntu.com/security/notices/USN-6821-2
- https://ubuntu.com/security/notices/USN-6821-3
- https://ubuntu.com/security/notices/USN-6821-4
- https://ubuntu.com/security/notices/USN-6828-1
- https://ubuntu.com/security/notices/USN-6831-1
- https://ubuntu.com/security/notices/USN-6867-1
- https://ubuntu.com/security/notices/USN-6871-1
- https://ubuntu.com/security/notices/USN-6892-1
- https://ubuntu.com/security/notices/USN-6919-1
- https://ubuntu.com/security/notices/USN-6926-1
- https://ubuntu.com/security/notices/USN-6926-2
- https://ubuntu.com/security/notices/USN-6926-3
- https://ubuntu.com/security/notices/USN-6938-1
- https://www.cve.org/CVERecord?id=CVE-2024-26840