UBUNTU-CVE-2024-38662
In the Linux kernel, the following vulnerability has been resolved: bpf: Allow delete from sockmap/sockhash only if update is allowed We have seen an influx of syzkaller reports where a BPF program attached to a tracepoint triggers a locking rule violation by performing a map_delete on a sockmap/sockhash. We don't intend to support this artificial use scenario. Extend the existing verifier allowed-program-type check for updating sockmap/sockhash to also cover deleting from a map. From now on only BPF programs which were previously allowed to update sockmap/sockhash can delete from these map types.
02 / AFFECTED SOFTWARE
Affected packages
53 explicit affected versions
116 explicit affected versions
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35 explicit affected versions
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3 explicit affected versions
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53 explicit affected versions
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42 explicit affected versions
36 explicit affected versions
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3 explicit affected versions
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55 explicit affected versions
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3 explicit affected versions
51 explicit affected versions
9 explicit affected versions
12 explicit affected versions
41 explicit affected versions
110 explicit affected versions
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5 explicit affected versions
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72 explicit affected versions
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16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
41 explicit affected versions
37 explicit affected versions
12 explicit affected versions
38 explicit affected versions
44 explicit affected versions
9 explicit affected versions
44 explicit affected versions
11 explicit affected versions
4 explicit affected versions
52 explicit affected versions
7 explicit affected versions
50 explicit affected versions
43 explicit affected versions
77 explicit affected versions
119 explicit affected versions
10 explicit affected versions
8 explicit affected versions
7 explicit affected versions
88 explicit affected versions
14 explicit affected versions
4 explicit affected versions
78 explicit affected versions
1 explicit affected versions
123 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: bpf: Allow delete from sockmap/sockhash only if update is allowed We have seen an influx of syzkaller reports where a BPF program attached to a tracepoint triggers a locking rule violation by performing a map_delete on a sockmap/sockhash. We don't intend to support this artificial use scenario. Extend the existing verifier allowed-program-type check for updating sockmap/sockhash to also cover deleting from a map. From now on only BPF programs which were previously allowed to update sockmap/sockhash can delete from these map types.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/98e948fb60d41447fd8d2d0c3b8637fc6b6dc26d
- https://git.kernel.org/stable/c/000a65bf1dc04fb2b65e2abf116f0bc0fc2ee7b1
- https://git.kernel.org/stable/c/11e8ecc5b86037fec43d07b1c162e233e131b1d9
- https://git.kernel.org/stable/c/29467edc23818dc5a33042ffb4920b49b090e63d
- https://git.kernel.org/stable/c/6693b172f008846811f48a099f33effc26068e1e
- https://git.kernel.org/stable/c/98e948fb60d41447fd8d2d0c3b8637fc6b6dc26d
- https://git.kernel.org/stable/c/b81e1c5a3c70398cf76631ede63a03616ed1ba3c
- https://ubuntu.com/security/CVE-2024-38662
- 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-7007-1
- https://ubuntu.com/security/notices/USN-7007-2
- https://ubuntu.com/security/notices/USN-7007-3
- https://ubuntu.com/security/notices/USN-7008-1
- https://ubuntu.com/security/notices/USN-7009-1
- https://ubuntu.com/security/notices/USN-7009-2
- https://ubuntu.com/security/notices/USN-7029-1
- https://www.cve.org/CVERecord?id=CVE-2024-38662