CVE catalog

CVE-2016-6305

openssl: CVE-2016-6305

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
Published: Sep 22, 2016, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 16.00% · Oct 27, 2026

The ssl3_read_bytes function in record/rec_layer_s3.c in OpenSSL 1.1.0 before 1.1.0a allows remote attackers to cause a denial of service (infinite loop) by triggering a zero-length record in an SSL_peek call.

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

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

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

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

Observed: Oct 23, 2026, 5:22:36 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [Red Hat security advisories and VEX]