Security readout for executives and security teams
Plain-English summary
A malformed OpenPGP signature can crash vulnerable GnuPG versions before 2.5.17. The reported impact is denial of service only: no data theft or code execution is described in the provided sources. Business urgency is generally low unless GnuPG handles untrusted signatures in critical automated workflows.
Executive priority
Treat this as a low-priority patching item unless vulnerable GnuPG is embedded in critical automation. The realistic business risk is interruption of services that process malicious or malformed signatures, not compromise of confidentiality or integrity based on current public information.
Technical view
CVE-2026-24883 is a CWE-476 NULL pointer issue in GnuPG parse_signature. A long signature packet length can make parsing return success while sig->data[] is NULL, causing an application crash. CVSS 3.1 is 3.7 with network attack vector, high complexity, no privileges, no user interaction, and low availability impact.
Likely exposure
Exposure is most relevant for systems running GnuPG before 2.5.17 that parse untrusted or externally supplied OpenPGP signatures. The source bundle specifically lists GnuPG 2.5.3 and the description says versions before 2.5.17 are affected.
Exploitation context
No active exploitation is indicated by the provided sources, and the CVE is not listed as KEV. The known impact is application crash. The CVSS vector suggests remote reachability is possible, but exploitation complexity is high and availability impact is limited.
Researcher notes
Evidence is limited to the CVE description, oss-security reference, and GnuPG tracker reference. Do not assume broader product impact beyond GnuPG. The vulnerability class is NULL dereference during signature parsing; assess crash impact in applications that invoke GnuPG on untrusted input.
Mitigation direction
- Upgrade GnuPG to 2.5.17 or later where applicable.
- Prioritize systems that automatically process untrusted OpenPGP signatures.
- Check GnuPG vendor guidance and distribution advisories for packaged fixes.
- Reduce exposure of automated signature-processing services where practical.
Validation and detection
- Inventory GnuPG versions across servers, containers, and build systems.
- Confirm whether any deployed GnuPG is before 2.5.17.
- Identify workflows that parse untrusted OpenPGP signatures automatically.
- Review vendor or distribution advisories for backported fixes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-476: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-24883 mapping review
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Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L2.21.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.7LowVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.openwall.com/lists/oss-security/2026/01/27/8CVE reference
- https://dev.gnupg.org/T8049CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.