CVE-2026-45383

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 64% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: None knownExposed: 0

A fix is available — apply it.

libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.0.19 have a heap buffer overflow (out-of-bounds READ) exists in decoder_context::decode_slice_unit_WPP() in libde265/decctx.cc. When decoding a WPP (Wavefront Parallel Processing) HEVC slice, ctbAddrRS is computed as ctbRow * ctbsWidth inside the entry-point loop. If the PPS/SPS headers are crafted so that this value exceeds pps.CtbAddrRStoTS.size(), the subsequent array access pps.CtbAddrRStoTS[ctbAddrRS] reads past the end of the allocated vector, triggering a heap-buffer-overflow confirmed by AddressSanitizer. Version 1.0.19 patches the issue.

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity69% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jul 21, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Heap buffer overflow (OOB read) in decode_slice_unit_WPP() via out-of-bounds CtbAddrRStoTS access — libde265 <= v1.0.18 · Advisory · strukturag/libde265 · GitHub

https://github.com/strukturag/libde265/security/advisories/GHSA-wg9q-ppqw-6q38

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibde265-examples (1.0.4-1ubuntu0.4+esm2) @ focal2026-09-20ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libde2651.0.11-0+deb11u1 ... 1.1.1-1 (16 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libde2651.0.11-1 ... 1.1.1-1 (10 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libde2651.0.15-11.0.15-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libde2651.0.15-1, 1.0.16-1, 1.0.18-11.1.1-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 61× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 141 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-20 05:54 UTCEG score recompute
  3. 2026-09-20 05:54 UTCVendor advisory
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 03:47 UTCEG score recompute
  6. 2026-09-18 03:47 UTCVendor advisory
  7. 2026-09-17 19:31 UTCEPSS rescore
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 12:35 UTCEG score recompute
  10. 2026-09-16 12:35 UTCVendor advisory
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-13 16:47 UTCEPSS rescore
  13. 2026-09-13 15:56 UTCEG score recompute
  14. 2026-09-13 15:56 UTCVendor advisory
  15. 2026-09-12 15:01 UTCEPSS rescore
  16. 2026-09-12 12:32 UTCEG score recompute
  17. 2026-09-12 12:32 UTCVendor advisory
  18. 2026-09-11 14:53 UTCEPSS rescore
  19. 2026-09-11 09:37 UTCEPSS rescore
  20. 2026-09-11 08:56 UTCEG score recompute
  21. 2026-09-11 08:56 UTCVendor advisory
  22. 2026-09-10 09:34 UTCEPSS rescore
  23. 2026-09-09 11:12 UTCEG score recompute
  24. 2026-09-09 11:12 UTCVendor advisory
  25. 2026-09-08 22:00 UTCEPSS rescore
Show 75 more
  1. 2026-09-07 22:30 UTCEG score recompute
  2. 2026-09-07 22:30 UTCVendor advisory
  3. 2026-09-07 16:01 UTCEPSS rescore
  4. 2026-09-06 13:47 UTCEPSS rescore
  5. 2026-09-06 10:50 UTCEG score recompute
  6. 2026-09-06 10:50 UTCVendor advisory
  7. 2026-09-05 08:28 UTCEG score recompute
  8. 2026-09-05 08:28 UTCVendor advisory
  9. 2026-09-04 05:06 UTCEPSS rescore
  10. 2026-09-02 14:12 UTCEPSS rescore
  11. 2026-09-02 00:56 UTCEG score recompute
  12. 2026-09-02 00:56 UTCVendor advisory
  13. 2026-09-01 13:54 UTCEPSS rescore
  14. 2026-08-31 04:33 UTCEG score recompute
  15. 2026-08-31 04:33 UTCVendor advisory
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 02:10 UTCEG score recompute
  18. 2026-08-30 02:10 UTCVendor advisory
  19. 2026-08-30 01:22 UTCEPSS rescore
  20. 2026-08-28 21:41 UTCEPSS rescore
  21. 2026-08-28 04:29 UTCEG score recompute
  22. 2026-08-28 04:29 UTCVendor advisory
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-27 02:05 UTCEG score recompute
  25. 2026-08-27 02:05 UTCVendor advisory
  26. 2026-08-26 14:46 UTCEPSS rescore
  27. 2026-08-25 23:42 UTCEG score recompute
  28. 2026-08-25 23:42 UTCVendor advisory
  29. 2026-08-25 13:49 UTCEPSS rescore
  30. 2026-08-24 21:08 UTCEG score recompute
  31. 2026-08-24 21:08 UTCVendor advisory
  32. 2026-08-23 18:44 UTCEG score recompute
  33. 2026-08-23 18:44 UTCVendor advisory
  34. 2026-08-23 00:19 UTCEPSS rescore
  35. 2026-08-22 16:22 UTCEG score recompute
  36. 2026-08-22 16:22 UTCVendor advisory
  37. 2026-08-21 23:49 UTCEPSS rescore
  38. 2026-08-21 13:59 UTCEG score recompute
  39. 2026-08-21 13:59 UTCVendor advisory
  40. 2026-08-20 22:55 UTCEPSS rescore
  41. 2026-08-20 11:34 UTCEG score recompute
  42. 2026-08-20 11:34 UTCVendor advisory
  43. 2026-08-19 17:04 UTCEPSS rescore
  44. 2026-08-19 09:08 UTCEG score recompute
  45. 2026-08-19 09:08 UTCVendor advisory
  46. 2026-08-18 13:48 UTCEPSS rescore
  47. 2026-08-18 06:41 UTCEG score recompute
  48. 2026-08-18 06:41 UTCVendor advisory
  49. 2026-08-17 13:47 UTCEPSS rescore
  50. 2026-08-17 04:18 UTCEG score recompute
  51. 2026-08-17 04:18 UTCVendor advisory
  52. 2026-08-16 14:56 UTCEPSS rescore
  53. 2026-08-16 02:14 UTCEPSS rescore
  54. 2026-08-16 01:55 UTCEG score recompute
  55. 2026-08-16 01:55 UTCVendor advisory
  56. 2026-08-15 01:30 UTCEPSS rescore
  57. 2026-08-14 23:32 UTCEG score recompute
  58. 2026-08-14 23:32 UTCVendor advisory
  59. 2026-08-13 22:00 UTCEPSS rescore
  60. 2026-08-13 21:09 UTCVendor advisory
  61. 2026-08-12 18:41 UTCEG score recompute
  62. 2026-08-12 18:41 UTCVendor advisory
  63. 2026-08-12 13:51 UTCEPSS rescore
  64. 2026-08-11 16:18 UTCEG score recompute
  65. 2026-08-11 16:18 UTCVendor advisory
  66. 2026-08-11 00:00 UTCEPSS rescore
  67. 2026-08-10 13:56 UTCEG score recompute
  68. 2026-08-10 13:56 UTCVendor advisory
  69. 2026-08-09 13:46 UTCEPSS rescore
  70. 2026-08-09 11:33 UTCEG score recompute
  71. 2026-08-09 11:33 UTCVendor advisory
  72. 2026-08-08 16:37 UTCEPSS rescore
  73. 2026-08-08 09:08 UTCEG score recompute
  74. 2026-08-08 09:08 UTCVendor advisory
  75. 2026-08-07 06:45 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-45383?
CVE-2026-45383 is a medium vulnerability published on July 21, 2026. libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.0.19 have a heap buffer overflow (out-of-bounds READ) exists in decodercontext::decodesliceunitWPP() in libde265/decctx.cc. When decoding a WPP (Wavefront Parallel Processing) HEVC slice, ctbAddrRS is computed…
When was CVE-2026-45383 disclosed?
CVE-2026-45383 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45383 actively exploited?
CVE-2026-45383 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.5% of all scored CVEs.
What is the CVSS score of CVE-2026-45383?
CVE-2026-45383 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-45383?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45383, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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