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.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 8.
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.
CVE-2021-3655Low· 3.3A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1
CVE-2021-38198Medium· 5.5arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access permissions of a shadow page, leading to a missing guest protection page fault.
CVE-2021-34556Medium· 5.5In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects the possibility of uninitial…
CVE-2021-35477Medium· 5.5In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store operation does not necessarily occu…
CVE-2022-34918High· 7.8An issue was discovered in the Linux kernel through 5.18.9
CVE-2021-34866High· 7.8This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3