SB2026082445 - Use-after-free in Linux kernel cisco enic driver
Published: August 24, 2026
Security Bulletin ID
SB2026082445
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-74725)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to use-after-free in the enic driver teardown work handling in enic_remove() when a TX timeout fires during device removal. A local attacker can trigger a TX timeout race to cause a denial of service.
The issue is caused by a race condition in which tx_hang_reset may be scheduled after the network device has been freed.
Remediation
Install update from vendor's website.