CVE catalog

CVE-2026-42765

Severity: High · CVSS 7.5
Published: Jun 9, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.51% · Oct 25, 2026

Issue summary: When a partial-chain certificate verification is enabled together with OCSP response checking for the whole chain, a NULL dereference will happen if the verified chain does not have a self-signed trusted anchor, crashing the process. Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application. When performing OCSP response checking for certificates in the verification chain, the code always tries to access the next certificate as the issuer. There is a check for a self-signed certificate. However with the partial chain verification enabled when the chain does not have a self-signed trusted anchor, the issuer will be NULL for the last certificate in the chain. A NULL pointer dereference then happens. This issue affects only applications which enable both OCSP verification of the certificate chain (X509_V_FLAG_OCSP_RESP_CHECK_ALL) and partial chain verification (X509_V_FLAG_PARTIAL_CHAIN) in the certificate verification. Both flags are disabled by default. For that reason, we have assigned Low severity to the issue. No FIPS modules are 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`	not affected
Debian	openssl	trixie-security	`3.5.7-1~deb13u3`	not affected
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	`3.6.3`	fixed
Cpe	openssl	Not reported	Not reported	unknown
Cpe	openssl	Not reported	Not reported	not affected
Ubuntu	nodejs	pro	`12.22.5~dfsg-5ubuntu1`	vulnerable
Ubuntu	nodejs	pro	`12.22.7~dfsg-2ubuntu1`	vulnerable
Ubuntu	nodejs	pro	`12.22.7~dfsg-2ubuntu3`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu2`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu3`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu3.1`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu3.2`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu3.3`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu3.4`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu3.5`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu3.6`	vulnerable
Ubuntu	nodejs	pro	`12.22.9~dfsg-1ubuntu3.6+esm2`	vulnerable

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	`Not affected`	unimportant	Not reported	[1139674]
Debian	openssl	source	bookworm	`Not affected`	unimportant	Not reported	[1139674]
Cpe	openssl	cpe	Not reported	`3.6.3`	Not reported	Not reported	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

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]