SB2026091363 - openEuler 22.03 LTS SP4 update for openvpn

Description

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2026-12996)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to use-after-free in ack_write_buf() when processing a well-timed sequence of control channel and authentication packets. A remote attacker can send a specially crafted packet sequence to cause a denial of service.

2) Memory leak (CVE-ID: CVE-2026-13698)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a memory leak in tls-crypt-v2 packet handling when processing suitable tls-crypt-v2 packets. A remote attacker can send specially crafted packets to cause a denial of service.

The issue can lead to an out-of-memory condition before the server crashes.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3784