Catalogo CVE
CVE-2026-42766
Issue summary: A specially crafted password-encrypted CMS message can trigger a NULL pointer dereference during CMS decryption. Impact summary: This NULL pointer dereference leads to an application c
- Gravità
- Medium · CVSS 5.9
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.06% · Oct 22, 2026
Issue summary: A specially crafted password-encrypted CMS message can trigger a NULL pointer dereference during CMS decryption. Impact summary: This NULL pointer dereference leads to an application crash and a Denial of Service. The CMS PasswordRecipientInfo.keyDerivationAlgorithm field is defined as OPTIONAL in the ASN.1 specification and may therefore be absent in specially crafted inputs. During the password-based CMS decryption the OpenSSL CMS implementation dereferences this field without first checking whether it was present. An attacker who supplies such a CMS message to an application performing password-based CMS decryption can trigger an application crash, leading to a Denial of Service. Applications that process password-encrypted CMS messages may be affected. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not 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 | fixed |
| Debian | openssl | trixie-security | 3.5.7-1~deb13u3 | fixed |
| Debian | openssl | bookworm | 3.0.20-1~deb12u2 | fixed |
| Debian | openssl | bookworm-security | 3.0.22-1~deb12u1 | fixed |
| Cpe | openssl | Not reported | 3.0.13-0ubuntu3.11 | fixed |
| Cpe | libssl-dev | Not reported | 3.0.13-0ubuntu3.11 | fixed |
| Cpe | libssl-doc | Not reported | 3.0.13-0ubuntu3.11 | fixed |
| Cpe | libssl3t64 | Not reported | 3.0.13-0ubuntu3.11 | fixed |
| Cpe | openssl | Not reported | 1.0.2zq | fixed |
| Cpe | openssl | Not reported | 1.1.1zh | fixed |
| Cpe | openssl | Not reported | 3.0.21 | fixed |
| Cpe | openssl | Not reported | 3.4.6 | fixed |
| Cpe | openssl | Not reported | 3.5.7 | fixed |
| Cpe | openssl | Not reported | 3.6.3 | fixed |
| Cpe | openssl | Not reported | Not reported | unknown |
| Cpe | openssl | Not reported | 3.0.20-1~deb12u2 | fixed |
| Alpine | openssl | 3.21 | 3.3.7-r1 | fixed |
| Alpine | openssl | 3.22 | 3.5.7-r0 | fixed |
| Alpine | openssl | 3.23 | 3.5.7-r0 | fixed |
| Alpine | openssl | 3.24 | 3.5.7-r0 | fixed |
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 | 3.5.6-1~deb13u2 | not yet assigned | Not reported | [1139674] |
| Debian | openssl | source | bookworm | 3.0.20-1~deb12u2 | not yet assigned | Not reported | [1139674] |
| Cpe | openssl | cpe | Not reported | 3.0.13-0ubuntu3.11 | Not reported | Not reported | Not reported |
| Cpe | libssl-dev | cpe | Not reported | 3.0.13-0ubuntu3.11 | Not reported | Not reported | Not reported |
| Cpe | libssl-doc | cpe | Not reported | 3.0.13-0ubuntu3.11 | Not reported | Not reported | Not reported |
| Cpe | libssl3t64 | cpe | Not reported | 3.0.13-0ubuntu3.11 | Not reported | Not reported | Not reported |
| Cpe | openssl | cpe | Not reported | 1.0.2zq | Not reported | Not reported | Not reported |
| Cpe | openssl | cpe | Not reported | 1.1.1zh | Not reported | Not reported | Not reported |
| Cpe | openssl | cpe | Not reported | 3.0.21 | Not reported | Not reported | Not reported |
| Cpe | openssl | cpe | Not reported | 3.4.6 | Not reported | Not reported | Not reported |
| Cpe | openssl | cpe | Not reported | 3.5.7 | Not reported | Not reported | Not reported |
| Cpe | openssl | cpe | Not reported | 3.6.3 | Not reported | Not reported | Not reported |
| Cpe | openssl | cpe | Not reported | 3.0.20-1~deb12u2 | Not reported | Not reported | Not reported |
| Alpine | openssl | apk | 3.21 | 3.3.7-r1 | Not reported | ALPINE-CVE-2026-42766 | Not reported |
| Alpine | openssl | apk | 3.22 | 3.5.7-r0 | Not reported | ALPINE-CVE-2026-42766 | Not reported |
| Alpine | openssl | apk | 3.23 | 3.5.7-r0 | Not reported | ALPINE-CVE-2026-42766 | Not reported |
| Alpine | openssl | apk | 3.24 | 3.5.7-r0 | Not reported | ALPINE-CVE-2026-42766 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libssl3]Interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
3.0.20-1~deb12u2· amd64 · bookwormCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· arm64 · bookwormCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· amd64 · bookworm-securityCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· arm64 · bookworm-securityCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.17-1~deb12u2· amd64 · bookworm-updatesInteressata · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.17-1~deb12u2· arm64 · bookworm-updatesInteressata · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- [libssl-dev]Interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
3.0.20-1~deb12u2· amd64 · bookwormCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· arm64 · bookwormCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· amd64 · bookworm-securityCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· arm64 · bookworm-securityCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.17-1~deb12u2· amd64 · bookworm-updatesInteressata · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.17-1~deb12u2· arm64 · bookworm-updatesInteressata · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- [libssl-doc]Interessata
Pacchetto sorgente: [openssl]
Dettagli (6)
3.0.20-1~deb12u2· all · bookwormCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· all · bookwormCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· all · bookworm-securityCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· all · bookworm-securityCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.17-1~deb12u2· all · bookworm-updatesInteressata · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.17-1~deb12u2· all · bookworm-updatesInteressata · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
- [openssl]Interessata
Dettagli (6)
3.0.20-1~deb12u2· amd64 · bookwormCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· arm64 · bookwormCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· amd64 · bookworm-securityCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.20-1~deb12u2· arm64 · bookworm-securityCorretta · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.17-1~deb12u2· amd64 · bookworm-updatesInteressata · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
3.0.17-1~deb12u2· arm64 · bookworm-updatesInteressata · Corretta:
3.0.20-1~deb12u2nvd · openssl · debian · bookworm; nvd · openssl · debian · 12
[Debian 13 (Trixie)]
- [libssl3t64]Corretta
Pacchetto sorgente: [openssl]
Dettagli (6)
3.5.6-1~deb13u2· amd64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· arm64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· arm64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u3· amd64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
- [libssl-dev]Corretta
Pacchetto sorgente: [openssl]
Dettagli (6)
3.5.6-1~deb13u2· amd64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· arm64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· arm64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u3· amd64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
- [libssl-doc]Corretta
Pacchetto sorgente: [openssl]
Dettagli (6)
3.5.6-1~deb13u2· all · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· all · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· all · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· all · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· all · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u3· all · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
- [openssl]Corretta
Dettagli (6)
3.5.6-1~deb13u2· amd64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· arm64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· arm64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u3· amd64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
- [openssl-provider-fips]Corretta
Pacchetto sorgente: [openssl]
Dettagli (6)
3.5.6-1~deb13u2· amd64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· arm64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· arm64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u3· amd64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
- [openssl-provider-legacy]Corretta
Pacchetto sorgente: [openssl]
Dettagli (6)
3.5.6-1~deb13u2· amd64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· arm64 · trixieCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.6-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· amd64 · trixie-security · Historical versionCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u2· arm64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
3.5.7-1~deb13u3· amd64 · trixie-securityCorretta · Corretta:
3.5.6-1~deb13u2nvd · openssl · debian · 13
Osservato:
Riferimenti
- [https://access.redhat.com/errata/RHSA-2026:34102]
- [https://ftp.suse.com/pub/projects/security/]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42766]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-42766]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-42766]
- [https://security-tracker.debian.org/tracker/CVE-2026-42766]
- [https://ubuntu.com/security/notices/USN-8414-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2455.json]
[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)]