CVE catalog

CVE-2026-42771

Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen. Impa

[CVE catalog]

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: Jun 9, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.22% · Oct 25, 2026

Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen. Impact summary: This out of bounds read will not directly exfiltrate the data read to the attacker so the most likely result is a crash and a Denial of Service. An internal helper function called from X509_VERIFY_PARAM_[set|add]_email() used a wrong length when validating the local part of an email address. This could cause the 64 octet limit on the local part of an email address to be not enforced, or cause an out of bound read and potentially a crash. The bug is reachable via S-MIME validation with a crafted From: address supplied in an email message that can potentially cause a crash. 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`	not affected
Debian	openssl	forky	`3.6.5-1`	not affected
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	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	`Not affected`	unimportant	Not reported	Not reported
Debian	openssl	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	openssl	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	openssl	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

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, 7:15:12 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]