An issue was discovered in the Linux kernel through 5.11.x....
Vulnerability Description
An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://www.kernel.org
- https://www.openwall.com/lists/oss-security/2021/04/18/4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9601148392520e2e134936e76788fc2a6371e7be
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6f55b2f2a1178856c19bbce2f71449926e731914
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=24c109bb1537c12c02aeed2d51a347b4d6a9b76e
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b658bbb844e28f1862867f37e8ca11a8e2aa94a3
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6aaece00a57fa6f22575364b3903dfbccf5345d
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073815b756c51ba9d8384d924c5d1c03ca3d1ae4
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f528819334881fd622fdadeddb3f7edaed8b7c9b
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7fedb63a8307dda0ec3b8969a3b233a1dd7ea8e0
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Weaknesses (CWE)
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