CVE catalog

CVE-2026-42764

Issue summary: Receiving a QUIC initial packet with an invalid token may trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation disabled. Impact summary: NULL pointer d

[CVE catalog]

Severity: High · CVSS 7.5
Published: Jun 9, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.17% · Oct 25, 2026

Issue summary: Receiving a QUIC initial packet with an invalid token may trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation disabled. Impact summary: NULL pointer dereference typically causes abnormal termination of the affected QUIC server process and a Denial of Service. If the address validation is disabled in the OpenSSL QUIC server implementation, an attacker can crash the server by sending an initial packet with an invalid or expired token. By default, the client address validation is enabled in the OpenSSL QUIC server implementation, which makes the default configuration not vulnerable to this issue. However if the SSL_LISTENER_FLAG_NO_VALIDATE is used with the SSL_new_listener() call, the address validation is disabled making the vulnerable code reachable. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	openssl	sid	`3.6.5-1`	fixed
Debian	openssl	forky	`3.6.5-1`	fixed
Debian	openssl	trixie	`3.5.7-1~deb13u2`	fixed
Debian	openssl	trixie-security	`3.5.7-1~deb13u3`	fixed
Debian	openssl	bookworm	`3.0.20-1~deb12u2`	not affected
Debian	openssl	bookworm-security	`3.0.22-1~deb12u2`	not affected
Cpe	openssl	Not reported	`3.0.13-0ubuntu3.11`	fixed
Cpe	libssl-dev	Not reported	`3.0.13-0ubuntu3.11`	fixed
Cpe	libssl-doc	Not reported	`3.0.13-0ubuntu3.11`	fixed
Cpe	libssl3t64	Not reported	`3.0.13-0ubuntu3.11`	fixed
Cpe	openssl	Not reported	`3.5.7`	fixed
Cpe	openssl	Not reported	`3.6.3`	fixed
Cpe	openssl	Not reported	Not reported	unknown
Cpe	openssl	Not reported	Not reported	not affected
Alpine	openssl	3.22	`3.5.7-r0`	fixed
Alpine	openssl	3.23	`3.5.7-r0`	fixed
Alpine	openssl	3.24	`3.5.7-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openssl	source	sid	`3.6.3-1`	not yet assigned	Not reported	[1139674]
Debian	openssl	source	forky	`3.6.3-1`	not yet assigned	Not reported	[1139674]
Debian	openssl	source	trixie	`3.5.6-1~deb13u2`	not yet assigned	Not reported	[1139674]
Debian	openssl	source	bookworm	`Not affected`	unimportant	Not reported	[1139674]
Cpe	openssl	cpe	Not reported	`3.0.13-0ubuntu3.11`	Not reported	Not reported	Not reported
Cpe	libssl-dev	cpe	Not reported	`3.0.13-0ubuntu3.11`	Not reported	Not reported	Not reported
Cpe	libssl-doc	cpe	Not reported	`3.0.13-0ubuntu3.11`	Not reported	Not reported	Not reported
Cpe	libssl3t64	cpe	Not reported	`3.0.13-0ubuntu3.11`	Not reported	Not reported	Not reported
Cpe	openssl	cpe	Not reported	`3.5.7`	Not reported	Not reported	Not reported
Cpe	openssl	cpe	Not reported	`3.6.3`	Not reported	Not reported	Not reported
Alpine	openssl	apk	3.22	`3.5.7-r0`	Not reported	ALPINE-CVE-2026-42764	Not reported
Alpine	openssl	apk	3.23	`3.5.7-r0`	Not reported	ALPINE-CVE-2026-42764	Not reported
Alpine	openssl	apk	3.24	`3.5.7-r0`	Not reported	ALPINE-CVE-2026-42764	Not reported

[Debian bug #1139674]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libssl3]Not affected
Source package: [openssl]
Details (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
[libssl-dev]Not affected
Source package: [openssl]
Details (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
[libssl-doc]Not affected
Source package: [openssl]
Details (6)
- 3.0.20-1~deb12u2 · all · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · all · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · all · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
[openssl]Not affected
Details (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm

[Debian 13 (Trixie)]

[libssl3t64]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[libssl-dev]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[libssl-doc]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · all · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · all · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · all · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · all · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · all · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · all · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[openssl]Fixed
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[openssl-provider-fips]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[openssl-provider-legacy]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13

Observed: Oct 27, 2026, 7:15:11 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]