CVE-2025-15467

Aliases:UBUNTU-CVE-2025-15467DEBIAN-CVE-2025-15467ALPINE-CVE-2025-15467CGA-8f29-c4cw-qq97CGA-c6p4-q6jv-qjrrCGA-366h-3fx8-wvw3CGA-367f-7qq5-cjv7CGA-46mm-w63f-9j9xCGA-7wrc-2mvm-533cCGA-cgmm-6frv-rgqvCGA-gmf5-9p7w-cx77CGA-mpqf-7j6c-h8f4CGA-p3c7-w42r-2g78CGA-qfv2-fx3p-vh9qCGA-w63v-c8mx-5v49
Advisory lineage Upstream: 0 Downstream: 28
Modified
Published: 27 Jan 2026, 16:01
Last modified:08 Sept 2026, 08:40

Vulnerability Summary

Overall Risk (default)
high
55/100
CVSS Score
8.8 HIGH
v3.1 (cve.org)
EPSS Score
48.21% HIGH
48% probability +47.51%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

27 Jan 2026, 16:01
Published
Vulnerability first disclosed
08 Sept 2026, 08:40
Last Modified
Vulnerability information updated

Description

Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData message with maliciously crafted AEAD parameters can trigger a stack buffer overflow. Impact summary: A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote code execution. When parsing CMS (Auth)EnvelopedData structures that use AEAD ciphers such as AES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters is copied into a fixed-size stack buffer without verifying that its length fits the destination. An attacker can supply a crafted CMS message with an oversized IV, causing a stack-based out-of-bounds write before any authentication or tag verification occurs. Applications and services that parse untrusted CMS or PKCS#7 content using AEAD ciphers (e.g., S/MIME (Auth)EnvelopedData with AES-GCM) are vulnerable. Because the overflow occurs prior to authentication, no valid key material is required to trigger it. While exploitability to remote code execution depends on platform and toolchain mitigations, the stack-based write primitive represents a severe risk. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3 and 3.0 are vulnerable to this issue. OpenSSL 1.1.1 and 1.0.2 are not affected by this issue.

CVSS Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 48.21%• Percentile: 99%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

  • CWE-120•Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

    The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Affected Systems

  • alpine•openssl

    ≥ 3.0.0, < 3.0.19-r0 | ≥ 3.0.0, < 3.3.6-r0 | ≥ 3.0.0, < 3.3.6-r0 | ≥ 3.0.0, < 3.5.5-r0 | ≥ 3.0.0, < 3.5.5-r0 | ≥ 3.0.0, < 3.5.5-r0

  • chainguard•libcrypto3-2.34

    < 3.6.1-r0

  • chainguard•openssl

    < 3.6.1-r0

  • chainguard•openssl-provider-fips

    < 0

  • chainguard•openssl-provider-fips-3.1.2

    < 0

  • chainguard•openssl-provider-fips-3.4.0

    < 0

  • chainguard•openssl-provider-fips-3.6.0

    < 0

  • wolfi•openssl

    < 3.6.1-r0

  • debian•openssl

    < 3.0.18-1~deb12u2 | < 3.5.4-1~deb13u2 | < 3.5.5-1

  • ubuntu•edk2

    all | all | all

  • ubuntu•edk2-hwe

    all

  • ubuntu•nodejs

    all

  • ubuntu•openssl

    < 3.0.2-0ubuntu1.21 | all | < 3.0.2-0ubuntu1.21+Fips1 | < 3.0.13-0ubuntu3.7 | < 3.5.3-1ubuntu3 | < 3.5.5-1ubuntu1

  • ubuntu•openssl-fips

    all | < 3.0.13-0ubuntu3.12+Fips1

  • openssl•openssl

    ≥ 3.1.0, < 3.3.6 | ≥ 3.6.0, < 3.6.1 | ≥ 3.5.0, < 3.5.5 | ≥ 3.4.0, < 3.4.4 | ≥ 3.3.0, < 3.3.6 | ≥ 3.0.0, < 3.0.19

References (47)