CLSA-2026-1786495354

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Import Source
https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1786495354.json
JSON Data
https://api.osv.dev/v1/vulns/CLSA-2026-1786495354
Upstream
CVE (2)
Published
2026-08-12T00:42:45Z
Modified
2026-10-26T09:31:52Z
Summary
Fix CVE(s): CVE-2026-12996
Details
  • SECURITY UPDATE: Use-after-free of a pending dedicated ACK buffer when a TLS session is freed during session promotion or expiry
    • debian/patches/CVE-2026-12996.patch: add the check_session_buf_not_used() safeguard, including its ks->ack_write_buf check, and call it before every site in tls_multi_process() that frees or resets a session
    • CVE-2026-12996
    • the safeguard does not exist in 2.4.7, so it is introduced here already in its post-CVE-2026-12996 form; as a result this patch also fixes CVE-2026-40215, which shares the same safeguard
References

Affected packages

TuxCare:Debian:10 / openvpn

Package

Name
openvpn
Purl
pkg:deb/tuxcare/openvpn?distro=debian-10

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.4.7-1+deb10u1+tuxcare.els2

Database specific

source
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1786495354.json"