Catalogo CVE

CVE-2026-72897

Gravità: High · CVSS 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published: Sep 29, 2026, 4:17:07 PM UTC
Updated: Sep 29, 2026, 4:17:09 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.27% · Oct 22, 2026

Issue summary: A TLS server that calls SSL_set_SSL_CTX() to switch a connection to a different SSL_CTX part way through a handshake may access memory beyond the end of an internal array if the replacement context knows about more provider signature algorithms than the context the connection was created from. Applications which never call SSL_set_SSL_CTX() are not affected. Impact summary: A remote peer may be able to cause a small out-of-bounds read, and in some circumstances a fixed-value out-of-bounds write, on the server heap. This may lead to a Denial of Service. CWE: CWE-787: Out-of-bounds Write Description: A TLS connection records how many certificate slots it has when it is created, taken from the SSL_CTX that created it: the built-in certificate types plus one slot for each provider TLS-SIGALG entry that context was aware of. That count sizes an internal array of per-slot certificate validity flags. An application may replace a connection's SSL_CTX part way through the handshake by calling SSL_set_SSL_CTX(), most commonly from a servername callback in order to serve a different virtual host. Doing so did not refresh the recorded count. A provider signature algorithm's slot index is its position in the list of whichever context resolves it, so if the replacement context is aware of more of them than the original, an algorithm offered by the peer can resolve to an index beyond the end of the array. Processing the peer's signature algorithms then reads one four byte word past the end for each such algorithm and, where the word read is zero, writes a fixed value over it. A peer offering many of them can corrupt heap metadata and abort the process. Only provider signature algorithms which occupy one of the excess slots, and which the server also has configured, have this effect. Codepoints the replacement context does not recognise are discarded without being resolved to a slot, and provider signature algorithms are usable only from TLS 1.3. The two contexts must therefore be aware of different numbers of provider signature algorithms, which requires separate library contexts, a provider loaded between the two being created, or providers which differ in what they advertise - in 4.0, for example, the default provider advertises SM2 where the FIPS provider does not. A deployment meeting the condition is also unable to negotiate the affected algorithms with legitimate clients, since the same stale count hides the corresponding certificates, so the misconfiguration is likely to be noticed. For that reason, and because the configuration is not the default, this issue has been assessed as Low severity. FIPS impact: no 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`	vulnerable
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~deb12u1`	not affected
Ubuntu	openssl	noble	`3.0.13-0ubuntu3.16`	fixed
Ubuntu	libssl-dev	noble	`3.0.13-0ubuntu3.16`	fixed
Ubuntu	libssl-doc	noble	`3.0.13-0ubuntu3.16`	fixed
Ubuntu	libssl3t64	noble	`3.0.13-0ubuntu3.16`	fixed
Cpe	openssl	Not reported	`4.0.3`	fixed
Alpine	openssl	3.21	`3.3.7-r2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openssl	source	sid	`3.6.5-1`	not yet assigned	Not reported	Not reported
Debian	openssl	source	forky	`3.6.5-1`	not yet assigned	Not reported	Not reported
Debian	openssl	source	trixie	`3.5.7-1~deb13u3`	not yet assigned	Not reported	Not reported
Debian	openssl	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Ubuntu	openssl	deb	noble	`3.0.13-0ubuntu3.16`	Not reported	Not reported	Not reported
Ubuntu	libssl-dev	deb	noble	`3.0.13-0ubuntu3.16`	Not reported	Not reported	Not reported
Ubuntu	libssl-doc	deb	noble	`3.0.13-0ubuntu3.16`	Not reported	Not reported	Not reported
Ubuntu	libssl3t64	deb	noble	`3.0.13-0ubuntu3.16`	Not reported	Not reported	Not reported
Cpe	openssl	cpe	Not reported	`4.0.3`	Not reported	NVD-CVE-2026-72897	Not reported
Alpine	openssl	apk	3.21	`3.3.7-r2`	Not reported	ALPINE-CVE-2026-72897	Not reported

OpenFactory catalog packages

[Debian 13 (Trixie)]

[libssl3t64]Interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Corretta · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
[libssl-dev]Interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Corretta · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
[libssl-doc]Interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
- 3.5.6-1~deb13u2 · all · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · all · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · all · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · all · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · all · trixie-security
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · all · trixie-security
  Corretta · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
[openssl]Interessata
Dettagli (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Corretta · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
[openssl-provider-fips]Interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Corretta · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
[openssl-provider-legacy]Interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Interessata · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Corretta · Corretta: 3.5.7-1~deb13u3
  nvd · openssl · debian · 13

[Debian 12 (Bookworm)]

[libssl3]Non interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Non interessata
  nvd · openssl · debian · bookworm
[libssl-dev]Non interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Non interessata
  nvd · openssl · debian · bookworm
[libssl-doc]Non interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
- 3.0.20-1~deb12u2 · all · bookworm
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm-security
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm-security
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · all · bookworm-updates
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · all · bookworm-updates
  Non interessata
  nvd · openssl · debian · bookworm
[openssl]Non interessata
Dettagli (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Non interessata
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Non interessata
  nvd · openssl · debian · bookworm

Osservato: Oct 24, 2026, 2:46:55 AM UTC

Riferimenti

[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)]