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Linux KernelOperating system · Linux

CVE-2026-23014

MEDIUM · 5.5 CVSS v3.1 Published 2026-01-28
Fix available
A fix is available. Upgrade to 6.18 / 6.18.6 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: perf: Ensure swevent hrtimer is properly destroyed With the change to hrtimer_try_to_cancel() in perf_swevent_cancel_hrtimer() it appears possible for the hrtimer to still be active by the time the event gets freed. Make sure the event does a full hrtimer_cancel() on the free path by installing a perf_event::destroy handler.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 6.17.8, < 6.18>= 6.18.1, < 6.18.6= 6.18= 6.19

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.18 / 6.18.6 or later
Fixed in 6.186.18.6
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel 6.18.6 or later for 6.18.x branches; upgrade to kernel 6.19.1 or later for 6.19.x; or upgrade to kernel 6.18 or later for 6.17.x branches

  1. Identify the currently running kernel version using `uname -r`
  2. Check if the running version is affected: >= 6.17.8 and < 6.18, or >= 6.18.1 and < 6.18.6, or exactly 6.18 or 6.19
  3. For RHEL/CentOS/Fedora systems: update kernel package via `dnf update kernel` or `yum update kernel` and reboot
  4. For Debian/Ubuntu systems: update kernel package via `apt-get update && apt-get dist-upgrade` or `apt-get install linux-image-<version>` and reboot
  5. For SUSE systems: update kernel via `zypper update kernel-*` and reboot
  6. Verify the new kernel version is installed: `uname -r` after reboot
Caveat Kernel upgrades may require system reboot and could have compatibility issues with custom kernel modules or specific hardware drivers; ensure backups and test in staging if possible

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-23014 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data