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Debian LinuxOperating system · Debian

CVE-2023-24756

MEDIUM · 5.5 CVSS v3.1 Published 2023-03-01
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
58/100
Remediation priority · Elevated
Public exploit No privileges Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
libde265 v1.0.10 was discovered to contain a NULL pointer dereference in the ff_hevc_put_unweighted_pred_8_sse function at sse-motion.cc. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input file.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-476

The code follows a pointer that is null, crashing the process. An attacker who can reliably trigger it turns the crash into a denial of service. The fix is checking for null before use and handling the failure path gracefully.

General guidance for the null pointer dereference class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Debian LinuxOperating system
Affected:= 10.0
Libde265Application
Affected:= 1.0.10

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix Moderate confidence

libde265 version greater than 1.0.10 (check GitHub releases for the version containing the fix for issue #380)

  1. 1. Identify all applications and packages that depend on the vulnerable libde265 library (e.g., ffmpeg, handbrake, mpv)
  2. 2. For each dependent application, check if it links to the system libde265 or bundles its own copy
  3. 3. If using system libde265 on Debian 10, check for available package updates via 'apt update' and 'apt list --upgradable'
  4. 4. Update libde265 package if a fixed version is available in Debian repositories: 'sudo apt update && sudo apt install libde265-0'
  5. 5. If using applications that bundle libde265, rebuild them against the fixed library version
  6. 6. After updating, verify the fix by running 'dpkg -s libde265-0' to confirm the installed version
  7. 7. Test that the updated library handles crafted HEVC files without crashing
Caveat Upgrading libde265 may require recompiling applications that link against it; test dependent applications thoroughly after the update

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-24756 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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