CVE-2025-21858: geneve: Fix use-after-free in geneve_find_dev().
geneve: Fix use-after-free in genevefinddev().
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.82.1-1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 5.15.179.1-1
Event History
Frequently Asked Questions
What is the severity of CVE-2025-21858?
CVE-2025-21858 has been classified with a high severity due to its potential impact on system stability.
How do I fix CVE-2025-21858?
To fix CVE-2025-21858, update your Linux kernel to the latest version where the vulnerability is patched.
What type of vulnerability is CVE-2025-21858?
CVE-2025-21858 is identified as a use-after-free vulnerability in the Linux kernel.
Which versions of Linux kernel are affected by CVE-2025-21858?
CVE-2025-21858 affects various versions of the Linux kernel prior to the patch release.
How was CVE-2025-21858 discovered?
CVE-2025-21858 was discovered through a syzkaller report indicating a use-after-free issue in geneve_find_dev().