SB2026070121 - Anolis OS update for shim-unsigned-x64
Published: July 1, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Unchecked Return Value (CVE-ID: CVE-2026-31790)
CWE-ID: CWE-252 - Unchecked Return Value
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to incorrect failure handling in RSA KEM RSASVE encapsulation when processing an attacker-supplied invalid RSA public key with EVP_PKEY_encapsulate(). A remote attacker can supply an invalid RSA public key to disclose sensitive information.
The issue affects applications using RSA/RSASVE encapsulation without validating the supplied public key first.
2) Use-after-free (CVE-ID: CVE-2026-45447)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to use-after-free in the PKCS7_verify() function when processing a specially crafted PKCS#7 or S/MIME signed message during PKCS#7 signature verification. A remote attacker can send a specially crafted signed message to execute arbitrary code.
Applications using the CMS APIs for this processing are not affected.
Remediation
Install update from vendor's website.