Security readout for executives and security teams
Plain-English summary
CVE-2022-43253 is a memory-safety flaw in libde265 v1.0.8. A crafted video file can crash software that uses the library to decode video. The documented impact is denial of service, not data theft or remote code execution.
Executive priority
Prioritize remediation for systems that automatically ingest or preview outside video content. For ordinary endpoints, treat this as moderate urgency unless libde265 is exposed through high-volume or business-critical media processing.
Technical view
The issue is a heap-buffer-overflow in put_unweighted_pred_16_fallback in fallback-motion.cc, classified as CWE-787. CVSS 3.1 is 6.5 with network attack vector, low complexity, no privileges, required user interaction, unchanged scope, and high availability impact.
Likely exposure
Exposure is most likely where libde265 v1.0.8 or vulnerable Debian libde265 packages process untrusted HEVC/H.265 video files. The CVE metadata has incomplete affected-product fields, so confirm through local package and dependency inventory.
Exploitation context
The source bundle says exploitation requires a crafted video file and user interaction. CISA KEV is false in the bundle, and no cited source here establishes active exploitation in the wild.
Researcher notes
Evidence supports denial of service from a crafted file through a heap buffer overflow. The provided sources do not prove code execution, active exploitation, or complete affected-version coverage beyond libde265 v1.0.8 and Debian advisories.
Mitigation direction
- Identify applications, services, and packages that include libde265.
- Apply relevant Debian security updates where Debian packages are used.
- Check upstream or vendor guidance for non-Debian builds.
- Reduce or isolate processing of untrusted video files.
- Sandbox media-processing workflows where practical.
Validation and detection
- Confirm whether libde265 v1.0.8 is present in assets or dependencies.
- Check Debian systems for DLA-3280-1 or DSA-5346 coverage.
- Verify externally supplied video files reach libde265 decoding paths.
- Review crash telemetry for libde265 heap-buffer-overflow symptoms.
- Document residual exposure where vendor fix status is unclear.
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-2022-43253 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/348CVE 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.