CVE-2026-45383

MEDIUMPre-NVD 6.96.9
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (35th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
6.9EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.9Exploit: None knownExposed services: Not assessed

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
6.9MEDIUMmedium confidence
EG Risk
46
EG Risk 46/100

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 (value × EchelonGraph’s weight)
Severity69% × 45%
The EG Score, 6.9 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 21, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jul 21, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibde265-examples (1.0.16-1ubuntu0.1~esm1) @ resolute2026-10-04ubuntu

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 rangeFix by version rangeDependents
libde2651.0.11-0+deb11u1 ... 1.1.1-1 (16 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libde2651.0.11-1, 1.0.11-1+deb12u1, 1.0.11-1+deb12u2
  • every version up to 1.0.11-1+deb12u3: fixed in 1.0.11-1+deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libde2651.0.15-1
  • every version up to 1.0.15-1+deb13u1: fixed in 1.0.15-1+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libde2651.0.15-1, 1.0.16-1, 1.0.18-1
  • every version up to 1.1.1-1: fixed in 1.1.1-1
—

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 / 41× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 171 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 71 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  3. 2026-10-12 16:04 UTCEG score recompute
  4. 2026-10-11 19:46 UTCEG score recompute
  5. 2026-10-11 17:01 UTCEG score recompute
  6. 2026-10-11 14:26 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  15. 2026-10-04 14:46 UTCEG score recompute
  16. 2026-10-04 14:46 UTCVendor advisory
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  19. 2026-10-01 07:25 UTCEG score recompute
  20. 2026-10-01 07:25 UTCVendor advisory
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  22. 2026-09-28 06:04 UTCEG score recompute
  23. 2026-09-28 06:04 UTCVendor advisory
  24. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 34th percentile
Show 75 more
  1. 2026-09-24 04:11 UTCEG score recompute
  2. 2026-09-24 04:11 UTCVendor advisory
  3. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  4. 2026-09-23 01:22 UTCEG score recompute
  5. 2026-09-23 01:22 UTCVendor advisory
  6. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-09-20 05:54 UTCEG score recompute
  8. 2026-09-20 05:54 UTCVendor advisory
  9. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-09-18 03:47 UTCEG score recompute
  11. 2026-09-18 03:47 UTCVendor advisory
  12. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-09-16 12:35 UTCEG score recompute
  15. 2026-09-16 12:35 UTCVendor advisory
  16. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-09-13 15:56 UTCEG score recompute
  19. 2026-09-13 15:56 UTCVendor advisory
  20. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-09-12 12:32 UTCEG score recompute
  22. 2026-09-12 12:32 UTCVendor advisory
  23. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-09-11 08:56 UTCEG score recompute
  26. 2026-09-11 08:56 UTCVendor advisory
  27. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  28. 2026-09-09 11:12 UTCEG score recompute
  29. 2026-09-09 11:12 UTCVendor advisory
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  31. 2026-09-07 22:30 UTCEG score recompute
  32. 2026-09-07 22:30 UTCVendor advisory
  33. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  34. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  35. 2026-09-06 10:50 UTCEG score recompute
  36. 2026-09-06 10:50 UTCVendor advisory
  37. 2026-09-05 08:28 UTCEG score recompute
  38. 2026-09-05 08:28 UTCVendor advisory
  39. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  40. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  41. 2026-09-02 00:56 UTCEG score recompute
  42. 2026-09-02 00:56 UTCVendor advisory
  43. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  44. 2026-08-31 04:33 UTCEG score recompute
  45. 2026-08-31 04:33 UTCVendor advisory
  46. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  47. 2026-08-30 02:10 UTCEG score recompute
  48. 2026-08-30 02:10 UTCVendor advisory
  49. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  50. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  51. 2026-08-28 04:29 UTCEG score recompute
  52. 2026-08-28 04:29 UTCVendor advisory
  53. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  54. 2026-08-27 02:05 UTCEG score recompute
  55. 2026-08-27 02:05 UTCVendor advisory
  56. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  57. 2026-08-25 23:42 UTCEG score recompute
  58. 2026-08-25 23:42 UTCVendor advisory
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  60. 2026-08-24 21:08 UTCEG score recompute
  61. 2026-08-24 21:08 UTCVendor advisory
  62. 2026-08-23 18:44 UTCEG score recompute
  63. 2026-08-23 18:44 UTCVendor advisory
  64. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  65. 2026-08-22 16:22 UTCEG score recompute
  66. 2026-08-22 16:22 UTCVendor advisory
  67. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  68. 2026-08-21 13:59 UTCEG score recompute
  69. 2026-08-21 13:59 UTCVendor advisory
  70. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  71. 2026-08-20 11:34 UTCEG score recompute
  72. 2026-08-20 11:34 UTCVendor advisory
  73. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  74. 2026-08-19 09:08 UTCEG score recompute
  75. 2026-08-19 09:08 UTCVendor advisory

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Frequently asked(5)

What is CVE-2026-45383?
CVE-2026-45383 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-45383 published?
The CVE record for CVE-2026-45383 was published on July 21, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 23, 2026; the record at its source may have been updated since.
Is CVE-2026-45383 actively exploited?
CVE-2026-45383 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45383?
CVE-2026-45383 has a CVSS base score of 6.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-45383?
A fix for CVE-2026-45383 is available: update to the fixed version the vendor names in its advisory.

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