vulnerability
Oracle Linux: CVE-2020-27170: ELSA-2021-2314: kernel security and bug fix update (IMPORTANT) (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:L/AC:H/Au:S/C:C/I:N/A:N) | 2021-03-19 | 2021-04-01 | 2025-01-23 |
Severity
4
CVSS
(AV:L/AC:H/Au:S/C:C/I:N/A:N)
Published
2021-03-19
Added
2021-04-01
Modified
2025-01-23
Description
An issue was discovered in the Linux kernel before 5.11.8. 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, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.
A flaw was found in the Linux kernels eBPF verification code. By default accessing the eBPF verifier is only accessible to privileged users with CAP_SYS_ADMIN. A local user with the ability to insert eBPF instructions can use the eBPF verifier to abuse a spectre like flaw where they can infer all system memory.
A flaw was found in the Linux kernels eBPF verification code. By default accessing the eBPF verifier is only accessible to privileged users with CAP_SYS_ADMIN. A local user with the ability to insert eBPF instructions can use the eBPF verifier to abuse a spectre like flaw where they can infer all system memory.
Solution(s)
oracle-linux-upgrade-kerneloracle-linux-upgrade-kernel-uek
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