Improper control of a resource through its lifetime in Linux kernel - CVE-2026-74611
Published: August 24, 2026
Vulnerability identifier: #VU144956
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74611
CWE-ID: CWE-664
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to overwrite memory in later caller iovecs beyond the returned length.
The vulnerability exists due to an improper iterator state restoration in tls_decrypt_sw() and the TLS 1.3 zero-copy retry path when processing a TLS 1.3 control record after optimistic zero-copy decryption. A remote attacker can send a specially crafted TLS record to overwrite memory in later caller iovecs beyond the returned length.
Exploitation requires the receiver to have TLS_RX_EXPECT_NO_PAD enabled.
Affected software
Linux kernel
How to mitigate CVE-2026-74611
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3