Access of Resource Using Incompatible Type ('Type Confusion') Affecting kernel-preempt package, versions <5.3.18-59.13.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.06% (26th percentile)

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  • Snyk IDSNYK-SLES153-KERNELPREEMPT-2671751
  • published14 Apr 2022
  • disclosed15 Jul 2021

Introduced: 15 Jul 2021

CVE-2021-33624  (opens in a new tab)
CWE-843  (opens in a new tab)

How to fix?

Upgrade SLES:15.3 kernel-preempt to version 5.3.18-59.13.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-preempt package and not the kernel-preempt package as distributed by SLES. See How to fix? for SLES:15.3 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.

CVSS Scores

version 3.1