Security readout for executives and security teams
Plain-English summary
CVE-2018-19761 is a denial-of-service issue in libsixel 1.8.2. A malformed or problematic sixel decoding input can trigger illegal address access, potentially crashing software that uses the library. The public record does not provide CVSS scoring, structured affected products, or a named fix.
Executive priority
Prioritize based on whether the organization processes untrusted sixel content. For exposed decoding services, treat this as an availability risk needing package review. For internal-only or unused libraries, urgency is lower but inventory confirmation is still needed.
Technical view
The CVE describes illegal address access in fromsixel.c, function sixel_decode_raw_impl, in libsixel 1.8.2. The reported impact is denial of service. The supplied sources do not include CWE classification, exploit details, fixed version, or reliable proof of active exploitation.
Likely exposure
Exposure is most plausible where libsixel 1.8.2 decodes untrusted sixel image or terminal graphics content. The CVE metadata lacks structured CPEs, so asset exposure must be confirmed through package inventories, SBOMs, or application dependency review.
Exploitation context
The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. Treat exploitation status as unconfirmed. The described outcome is availability loss through a crash, not data theft or remote code execution.
Researcher notes
Evidence is sparse: no CVSS, CWE, CPE, fixed version, or exploit confirmation is supplied. The core finding is an illegal address access in libsixel 1.8.2 raw sixel decoding that can cause denial of service.
Mitigation direction
- Inventory systems and applications using libsixel, especially version 1.8.2.
- Check vendor or distribution advisories for fixed packages or backported patches.
- Avoid decoding untrusted sixel content until vendor guidance is applied.
- Isolate services that process external sixel input and apply resource limits.
Validation and detection
- Review SBOMs, package manifests, and dependency records for libsixel 1.8.2.
- Identify applications that pass external content into sixel decoding paths.
- Confirm whether installed distro packages include maintainer fixes or backports.
- Review crash reports for failures involving fromsixel.c or sixel_decode_raw_impl.
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.
CVE-2018-19761 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.redhat.com/show_bug.cgi?id=1649200CVE reference · x_refsource_MISC
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.