Security readout for executives and security teams
Plain-English summary
CVE-2022-43239 is a denial-of-service flaw in libde265 v1.0.8, a library for decoding H.265/HEVC video. A malicious video file can trigger a heap buffer overflow and crash software that processes it. The cited sources do not show data theft, code execution, or confirmed active exploitation.
Executive priority
Prioritize remediation for internet-facing upload workflows and automated media-processing systems. For general endpoints, handle through normal patch management unless they routinely process untrusted video. Business risk is service interruption, not proven compromise, based on the provided sources.
Technical view
The CVE describes a CWE-787 heap-buffer-overflow in mc_chroma<unsigned short> in motion.cc. CVSS 3.1 is 6.5: network reachable, low complexity, no privileges, user interaction required, availability impact high, confidentiality and integrity unaffected.
Likely exposure
Exposure is most likely where libde265 is used to decode untrusted or externally supplied H.265/HEVC video files, including media services, file-processing pipelines, desktop viewers, and Linux systems carrying vulnerable packages. The bundle does not provide complete affected product or version ranges beyond libde265 v1.0.8.
Exploitation context
The required trigger is processing a crafted video file. KEV is false, and the provided sources do not cite in-the-wild exploitation. Treat this as a reliability and service-availability risk, especially for automated video ingestion or preview generation.
Researcher notes
Evidence supports a heap overflow DoS in libde265 v1.0.8 with function and file context. Public metadata lacks precise upstream fixed version, affected CPEs, and exploit status beyond no KEV listing. Debian published security updates, so downstream package tracking is important.
Mitigation direction
- Inventory systems and applications that include libde265 or process H.265/HEVC files.
- Apply vendor or distribution security updates, including relevant Debian libde265 advisories where applicable.
- Restrict automated processing of untrusted video until affected components are updated.
- Run media decoding workloads with isolation and resource limits where feasible.
- Monitor vendor guidance for exact fixed versions and downstream package status.
Validation and detection
- Confirm installed libde265 package or bundled library versions against vendor advisories.
- Identify services that automatically decode uploaded, emailed, or downloaded video files.
- Review crash logs for libde265 decoding failures after handling external media.
- Verify patched systems no longer report vulnerable libde265 package versions.
- Check dependency manifests for statically bundled libde265 copies.
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-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-43239 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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:L/PR:N/UI:R/S:U/C:N/I:N/A:H2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/strukturag/libde265/issues/341CVE reference
- [debian-lts-announce] 20230124 [SECURITY] [DLA 3280-1] libde265 security updateCVE reference · mailing-list
- DSA-5346CVE reference · vendor-advisory
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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.