CVE-2024-43873: vhost/vsock: always initialize seqpacket_allow
First published: Wed Aug 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: vhost/vsock: always initialize seqpacket_allow There are two issues around seqpacket_allow: 1. seqpacket_allow is not initialized when socket is created. Thus if features are never set, it will be read uninitialized. 2. if VIRTIO_VSOCK_F_SEQPACKET is set and then cleared, then seqpacket_allow will not be cleared appropriately (existing apps I know about don't usually do this but it's legal and there's no way to be sure no one relies on this). To fix: - initialize seqpacket_allow after allocation - set it unconditionally in set_features
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.14<5.15.165 | |
| Linux Kernel | >=5.16<6.1.103 | |
| Linux Kernel | >=6.2<6.6.44 | |
| Linux Kernel | >=6.7<6.10.3 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 | |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/1e1fdcbdde3b7663e5d8faeb2245b9b151417d22
- https://git.kernel.org/stable/c/3062cb100787a9ddf45de30004b962035cd497fb
- https://git.kernel.org/stable/c/30bd4593669443ac58515e23557dc8cef70d8582
- https://git.kernel.org/stable/c/ea558f10fb05a6503c6e655a1b7d81fdf8e5924c
- https://git.kernel.org/stable/c/eab96e8716cbfc2834b54f71cc9501ad4eec963b
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-43873
- https://nvd.nist.gov/vuln/detail/CVE-2024-43873
- https://launchpad.net/bugs/cve/CVE-2024-43873
- https://security-tracker.debian.org/tracker/CVE-2024-43873
- https://ubuntu.com/security/CVE-2024-43873
- https://git.kernel.org/linus/1e1fdcbdde3b7663e5d8faeb2245b9b151417d22
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