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No exploitation reportedFix available

CVE-2026-24881

No exploitation reported by the sources we read.

  • Published2026-01-27
  • Fixed in2.5.17
  • WeaknessCWE-121

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In GnuPG before 2.5.17, a crafted CMS (S/MIME) EnvelopedData message carrying an oversized wrapped session key can cause a stack-based buffer overflow in gpg-agent during PKDECRYPT--kem=CMS handling. This can easily be leveraged for denial of service; however, there is also memory corruption that could lead to remote code execution.

Timeline

dates in UTC
  1. 2026-01-2719:16CVE publishedNVD

Versions per branch

NVD
Gnupg
BranchAffectedFixed in
2.5≥ 2.5.13, < 2.5.172.5.17
Gpg4win
BranchAffectedFixed in
5.0≥ 5.0.0, < 5.0.15.0.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As mitre, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • GnuPGother versions: not affected
    Affected
    • ≥ 2.5.13, < 2.5.17fixed in 2.5.17semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-01-27

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gpg2openSUSE:Tumbleweedall versions · fixed in 2.5.17-1.1

Vendor advisories

  • CVE-2026-24881 Red Hat Product Security3 known affected

    GnuPG: GnuPG: Remote code execution and denial of service via crafted CMS EnvelopedData message

    gnupg2 as a component of Red Hat Enterprise Linux 6 · gnupg2-smime as a component of Red Hat Enterprise Linux 6 · gnupg2.src as a component of Red Hat Enterprise Linux 6

Full record on NVD

Fix

  1. Update Gnupg to 2.5.17
  2. Workaround from the vendor Red Hat Product Security CVE-2026-24881 · 3 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
  3. No fix planned, says the vendor Red Hat Product Security CVE-2026-24881 · 3 productsWill not fix

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-01-27
Last Modified
2026-07-15
NVD status
Modified
GitHub Advisory
GHSA-5w36-x85h-pphm

Frequently asked questions

What is CVE-2026-24881?

In GnuPG before 2.5.17, a crafted CMS (S/MIME) EnvelopedData message carrying an oversized wrapped session key can cause a stack-based buffer overflow in gpg-agent during PKDECRYPT--kem=CMS handling. This can easily be leveraged for denial of service; however, there is also memory corruption that could lead to remote code execution.

Is CVE-2026-24881 actively exploited?

Active exploitation of CVE-2026-24881 has not been confirmed. Its EPSS score was 1.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-24881?

CVE-2026-24881 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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