medium4.7
CVE-2021-33624
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 BP…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | before 5.12.13 |
| Debian | Debian Linux | Version 9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- http://www.openwall.com/lists/oss-security/2021/06/21/1
- https://github.com/benschlueter/CVE-2021-33624
- 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