Out-of-Bounds Affecting perf package, versions *
Threat Intelligence
EPSS
0.06% (26th
percentile)
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Test your applications- Snyk ID SNYK-RHEL8-PERF-1359860
- published 26 Jul 2021
- disclosed 21 Jun 2021
Introduced: 21 Jun 2021
CVE-2021-33624 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 perf.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db
- http://www.openwall.com/lists/oss-security/2021/06/21/1
- https://access.redhat.com/security/cve/CVE-2021-33624
- https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
CVSS Scores
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