Incomplete Blacklist Affecting kernel package, versions *


Severity

Recommended
low

Based on CentOS security rating.

Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-CENTOS10-KERNEL-18047003
  • published21 Jul 2026
  • disclosed19 Jul 2026

Introduced: 19 Jul 2026

NewCVE-2026-53370  (opens in a new tab)
CWE-184  (opens in a new tab)

How to fix?

There is no fixed version for Centos:10 kernel.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Centos. See How to fix? for Centos:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

perf/x86/intel: Improve validation and configuration of ACR masks

Currently there are several issues on the user space ACR mask validation and configuration.

  • The validation for user space ACR mask (attr.config2) is incomplete, e.g., the ACR mask could include the index which belongs to another ACR events group, but it's not validated.
  • An early return on an invalid ACR mask caused all subsequent ACR groups to be skipped.
  • The stale hardware ACR mask (hw.config1) is not cleared before setting new hardware ACR mask.

The following changes address all of the above issues.

  • Figure out the event index group of an ACR group. Any bits in the user-space mask not present in the index group are now dropped.
  • Instead of an early return on invalid bits, drop only the invalid portions and continue iterating through all ACR events to ensure full configuration.
  • Explicitly clear the stale hardware ACR mask for each event prior to writing the new configuration.

Besides, a non-leader event member of ACR group could be disabled in theory. This could cause bit-shifting errors in the acr_mask of remaining group members. But since ACR sampling requires all events to be active, this should not be a big concern in real use case. Add a "FIXME" comment to notice this risk.

CVSS Base Scores

version 3.1