UBUNTU-CVE-2022-48816
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: lock against ->sock changing during sysfs read ->sock can be set to NULL asynchronously unless ->recv_mutex is held. So it is important to hold that mutex. Otherwise a sysfs read can trigger an oops. Commit 17f09d3f619a ("SUNRPC: Check if the xprt is connected before handling sysfs reads") appears to attempt to fix this problem, but it only narrows the race window.
02 / AFFECTED SOFTWARE
Affected packages
86 explicit affected versions
50 explicit affected versions
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96 explicit affected versions
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35 explicit affected versions
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1 explicit affected versions
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12 explicit affected versions
1 explicit affected versions
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12 explicit affected versions
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37 explicit affected versions
10 explicit affected versions
64 explicit affected versions
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13 explicit affected versions
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88 explicit affected versions
51 explicit affected versions
33 explicit affected versions
23 explicit affected versions
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10 explicit affected versions
11 explicit affected versions
12 explicit affected versions
7 explicit affected versions
12 explicit affected versions
73 explicit affected versions
89 explicit affected versions
10 explicit affected versions
26 explicit affected versions
1 explicit affected versions
65 explicit affected versions
13 explicit affected versions
16 explicit affected versions
87 explicit affected versions
3 explicit affected versions
2 explicit affected versions
51 explicit affected versions
12 explicit affected versions
69 explicit affected versions
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27 explicit affected versions
62 explicit affected versions
8 explicit affected versions
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8 explicit affected versions
10 explicit affected versions
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13 explicit affected versions
7 explicit affected versions
10 explicit affected versions
12 explicit affected versions
35 explicit affected versions
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16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
38 explicit affected versions
9 explicit affected versions
11 explicit affected versions
89 explicit affected versions
7 explicit affected versions
4 explicit affected versions
78 explicit affected versions
1 explicit affected versions
1 explicit affected versions
87 explicit affected versions
77 explicit affected versions
77 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
1 explicit affected versions
76 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: lock against ->sock changing during sysfs read ->sock can be set to NULL asynchronously unless ->recv_mutex is held. So it is important to hold that mutex. Otherwise a sysfs read can trigger an oops. Commit 17f09d3f619a ("SUNRPC: Check if the xprt is connected before handling sysfs reads") appears to attempt to fix this problem, but it only narrows the race window.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/b49ea673e119f59c71645e2f65b3ccad857c90ee
- https://git.kernel.org/stable/c/9482ab4540f5bcc869b44c067ae99b5fca16bd07
- https://git.kernel.org/stable/c/b49ea673e119f59c71645e2f65b3ccad857c90ee
- https://ubuntu.com/security/CVE-2022-48816
- https://ubuntu.com/security/notices/USN-8493-1
- https://ubuntu.com/security/notices/USN-8493-2
- https://ubuntu.com/security/notices/USN-8527-1
- https://ubuntu.com/security/notices/USN-8528-1
- https://ubuntu.com/security/notices/USN-8547-1
- https://ubuntu.com/security/notices/USN-8547-2
- https://www.cve.org/CVERecord?id=CVE-2022-48816