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Information Exposure The advisory has been revoked - it doesn't affect any version of package kernel-headers  (opens in a new tab)

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EPSS
0.31% (24th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELHEADERS-4187059
  • published26 Jul 2021
  • disclosed30 Apr 2021
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Introduced: 30 Apr 2021

CVE-2021-31829  (opens in a new tab)
CWE-200  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.

References