CVE-2026-62840

High

Time-of-check time-of-use (toctou) race condition in Linux Kernel allows an authorized attacker to elevate privileges locally.

Package Linux Kernel
Published 2026-10-13
Last modified 2026-10-13
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

7.0

out of 10
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-367

CVE-2026-62840 is classified as CWE-367

See CWE-367 on MITRE CWE for full details on this weakness type.

References

1 total

Frequently asked questions

  • What is CVE-2026-62840?

    CVE-2026-62840 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 . CVE-2026-62840 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2026-62840?

    CVE-2026-62840 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2026-62840?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2026-62840 patch availability.

  • Is CVE-2026-62840 actively exploited?

    No. CVE-2026-62840 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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