CVE-2021-33624Medium· 4.7▾ TwilightPoC availableIn 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 C…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 25.9 · likelihood 0.2 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.9%
1 GitHub repo (last check)
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.
linux_kernel < 5.12.13debian_linux = 9.0Upgrade past the affected range:
linux_kernel 5.12.13Connected by shared product, vendor, weakness, or advisory.
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