UBUNTU-CVE-2024-39496
In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix use-after-free due to race with dev replace While loading a zone's info during creation of a block group, we can race with a device replace operation and then trigger a use-after-free on the device that was just replaced (source device of the replace operation). This happens because at btrfs_load_zone_info() we extract a device from the chunk map into a local variable and then use the device while not under the protection of the device replace rwsem. So if there's a device replace operation happening when we extract the device and that device is the source of the replace operation, we will trigger a use-after-free if before we finish using the device the replace operation finishes and frees the device. Fix this by enlarging the critical section under the protection of the device replace rwsem so that all uses of the device are done inside the critical section.
02 / AFFECTED SOFTWARE
Affected packages
31 explicit affected versions
12 explicit affected versions
26 explicit affected versions
4 explicit affected versions
1 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
13 explicit affected versions
2 explicit affected versions
10 explicit affected versions
11 explicit affected versions
36 explicit affected versions
50 explicit affected versions
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6 explicit affected versions
12 explicit affected versions
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6 explicit affected versions
59 explicit affected versions
10 explicit affected versions
45 explicit affected versions
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45 explicit affected versions
10 explicit affected versions
3 explicit affected versions
12 explicit affected versions
9 explicit affected versions
52 explicit affected versions
7 explicit affected versions
51 explicit affected versions
4 explicit affected versions
13 explicit affected versions
6 explicit affected versions
35 explicit affected versions
12 explicit affected versions
17 explicit affected versions
4 explicit affected versions
18 explicit affected versions
13 explicit affected versions
38 explicit affected versions
9 explicit affected versions
13 explicit affected versions
23 explicit affected versions
13 explicit affected versions
21 explicit affected versions
16 explicit affected versions
10 explicit affected versions
11 explicit affected versions
7 explicit affected versions
43 explicit affected versions
12 explicit affected versions
14 explicit affected versions
7 explicit affected versions
12 explicit affected versions
4 explicit affected versions
13 explicit affected versions
5 explicit affected versions
37 explicit affected versions
26 explicit affected versions
13 explicit affected versions
7 explicit affected versions
29 explicit affected versions
13 explicit affected versions
56 explicit affected versions
3 explicit affected versions
4 explicit affected versions
54 explicit affected versions
16 explicit affected versions
13 explicit affected versions
1 explicit affected versions
33 explicit affected versions
23 explicit affected versions
10 explicit affected versions
1 explicit affected versions
3 explicit affected versions
11 explicit affected versions
12 explicit affected versions
7 explicit affected versions
12 explicit affected versions
11 explicit affected versions
43 explicit affected versions
37 explicit affected versions
53 explicit affected versions
10 explicit affected versions
26 explicit affected versions
13 explicit affected versions
11 explicit affected versions
16 explicit affected versions
56 explicit affected versions
12 explicit affected versions
44 explicit affected versions
3 explicit affected versions
2 explicit affected versions
51 explicit affected versions
9 explicit affected versions
26 explicit affected versions
8 explicit affected versions
12 explicit affected versions
42 explicit affected versions
27 explicit affected versions
28 explicit affected versions
5 explicit affected versions
17 explicit affected versions
5 explicit affected versions
8 explicit affected versions
10 explicit affected versions
8 explicit affected versions
13 explicit affected versions
7 explicit affected versions
47 explicit affected versions
10 explicit affected versions
13 explicit affected versions
4 explicit affected versions
12 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
42 explicit affected versions
37 explicit affected versions
12 explicit affected versions
14 explicit affected versions
53 explicit affected versions
38 explicit affected versions
45 explicit affected versions
9 explicit affected versions
45 explicit affected versions
11 explicit affected versions
7 explicit affected versions
51 explicit affected versions
13 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
14 explicit affected versions
4 explicit affected versions
11 explicit affected versions
1 explicit affected versions
5 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix use-after-free due to race with dev replace While loading a zone's info during creation of a block group, we can race with a device replace operation and then trigger a use-after-free on the device that was just replaced (source device of the replace operation). This happens because at btrfs_load_zone_info() we extract a device from the chunk map into a local variable and then use the device while not under the protection of the device replace rwsem. So if there's a device replace operation happening when we extract the device and that device is the source of the replace operation, we will trigger a use-after-free if before we finish using the device the replace operation finishes and frees the device. Fix this by enlarging the critical section under the protection of the device replace rwsem so that all uses of the device are done inside the critical section.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/0090d6e1b210551e63cf43958dc7a1ec942cdde9
- https://git.kernel.org/stable/c/0090d6e1b210551e63cf43958dc7a1ec942cdde9
- https://git.kernel.org/stable/c/092571ef9a812566c8f2c9038d9c2a64c49788d6
- https://git.kernel.org/stable/c/17765964703b88d8befd899f8501150bb7e07e43
- https://git.kernel.org/stable/c/a0cc006f4214b87e70983c692e05bb36c59b5752
- https://ubuntu.com/security/CVE-2024-39496
- https://ubuntu.com/security/notices/USN-6999-1
- https://ubuntu.com/security/notices/USN-6999-2
- https://ubuntu.com/security/notices/USN-7004-1
- https://ubuntu.com/security/notices/USN-7005-1
- https://ubuntu.com/security/notices/USN-7005-2
- https://ubuntu.com/security/notices/USN-7008-1
- https://ubuntu.com/security/notices/USN-7021-1
- https://ubuntu.com/security/notices/USN-7021-2
- https://ubuntu.com/security/notices/USN-7021-3
- https://ubuntu.com/security/notices/USN-7021-4
- https://ubuntu.com/security/notices/USN-7021-5
- https://ubuntu.com/security/notices/USN-7029-1
- https://www.cve.org/CVERecord?id=CVE-2024-39496