CVE-2021-33624
First published: Wed Jun 23 2021(Updated: )
In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.12.13 | |
| Debian Debian Linux | =9.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2021/06/21/1
- https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner
- https://launchpad.net/bugs/cve/CVE-2021-33624
- https://www.openwall.com/lists/oss-security/2021/06/21/1
- https://security-tracker.debian.org/tracker/CVE-2021-33624
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33624
- https://nvd.nist.gov/vuln/detail/CVE-2021-33624
- https://ubuntu.com/security/CVE-2021-33624
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