CVE-2026-7531CWE-416

Use-after-free in PQC hybrid key-share handling

Low · published June 25, 2026

CVSS v4.0
2.3
EPSS
0%
Percentile
41.7
In the wild
Unconfirmed
What it is

Use-after-free in PQC hybrid key-share handling. This is an incomplete-fix follow-up to CVE-2026-5460 (released in 5.9.1): a malicious TLS 1.3 server sending a truncated PQC hybrid KeyShare can still trigger the error cleanup path to operate on freed memory.

The record
Technical detail
CVSS v4.0
2.3 · LOW
Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00497 · 41.7th percentile
Weakness
CWE-416 · Use After Free
Published
2026-06-25T20:01Z
EPSS history
Timeline
  • 25 JUN 20:01Z
    Use-after-free in PQC hybrid key-share handling
    cvelistv5