CVE catalog

CVE-2026-63074

Issue summary: The OpenSSL Certificate Management Protocol (CMP) caches additional certificates (extraCerts) sent in a CMP message, but never expunges them (for instance if they are invalid). If a se

[CVE catalog]

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Aug 25, 2026, 1:17:49 PM UTC
Updated: Aug 25, 2026, 1:19:26 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.59% · Oct 22, 2026

Issue summary: The OpenSSL Certificate Management Protocol (CMP) caches additional certificates (extraCerts) sent in a CMP message, but never expunges them (for instance if they are invalid). If a server reuses an OSSL_CMP_CTX frequently, this cache of extraCerts may grow unboundedly, and a malicious client may flood a CMP server with requests driving this growth. Impact summary: Users utilizing a CMP server that reuses a single OSSL_CMP_CTX for the lifetime of a server process may observe unbounded memory growth in the event a malicious client repeatedly sends requests containing unique extra certificates, which may lead to OOM conditions. CWE: CWE-770: Allocation of Resources Without Limits or Throttling Description: If a remote user sends CMP messages to a server with a list of extraCerts and the message is rejected, the extraCerts from the message remains in the server contexts untrusted certificate stack. This exposes servers with long lived ctx objects to Denial of Service attacks in which an attacker sends messages intending to be rejected with a large list of additional certificates repeatedly, forcing the server to store them indefinitely. The issue was fixed by removing the added extra certs if the message is rejected, using the same method as when the context is configured to not do caching at all. FIPS impact: no As the CMP code lives outside the FIPS module boundary, no FIPS modules are affected by this CVE.

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`	vulnerable
Debian	openssl	bookworm-security	`3.0.22-1~deb12u1`	fixed
Ubuntu	openssl	noble	`3.0.13-0ubuntu3.15`	fixed
Ubuntu	libssl-dev	noble	`3.0.13-0ubuntu3.15`	fixed
Ubuntu	libssl-doc	noble	`3.0.13-0ubuntu3.15`	fixed
Ubuntu	libssl3t64	noble	`3.0.13-0ubuntu3.15`	fixed
Cpe	openssl	Not reported	`4.0.2`	fixed
Alpine	openssl	3.22	`3.5.8-r0`	fixed
Alpine	openssl	3.23	`3.5.8-r0`	fixed
Alpine	openssl	3.24	`3.5.8-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openssl	source	sid	`3.6.4-1`	not yet assigned	Not reported	Not reported
Debian	openssl	source	forky	`3.6.4-1`	not yet assigned	Not reported	Not reported
Debian	openssl	source	trixie	`3.5.7-1~deb13u2`	not yet assigned	Not reported	Not reported
Debian	openssl	source	bookworm	`3.0.22-1~deb12u1`	not yet assigned	Not reported	Not reported
Ubuntu	openssl	deb	noble	`3.0.13-0ubuntu3.15`	Not reported	Not reported	Not reported
Ubuntu	libssl-dev	deb	noble	`3.0.13-0ubuntu3.15`	Not reported	Not reported	Not reported
Ubuntu	libssl-doc	deb	noble	`3.0.13-0ubuntu3.15`	Not reported	Not reported	Not reported
Ubuntu	libssl3t64	deb	noble	`3.0.13-0ubuntu3.15`	Not reported	Not reported	Not reported
Cpe	openssl	cpe	Not reported	`4.0.2`	Not reported	NVD-CVE-2026-63074	Not reported
Alpine	openssl	apk	3.22	`3.5.8-r0`	Not reported	ALPINE-CVE-2026-63074	Not reported
Alpine	openssl	apk	3.23	`3.5.8-r0`	Not reported	ALPINE-CVE-2026-63074	Not reported
Alpine	openssl	apk	3.24	`3.5.8-r0`	Not reported	ALPINE-CVE-2026-63074	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
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
[libssl-dev]Unknown
Source package: [openssl]
Details (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
[libssl-doc]Unknown
Source package: [openssl]
Details (6)
- 3.0.20-1~deb12u2 · all · bookworm
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · all · bookworm
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · all · bookworm-security
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · all · bookworm-security
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.17-1~deb12u2 · all · bookworm-updates
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.17-1~deb12u2 · all · bookworm-updates
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
[openssl]Unknown
Details (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Affected · Fixed: 3.0.22-1~deb12u1
  nvd · openssl · debian · bookworm; nvd · openssl · debian · 12

[Debian 13 (Trixie)]

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

Observed: Oct 23, 2026, 9:37:02 PM 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)]