CVE-2026-56208

HIGHPre-NVD 7.67.6—
EchelonGraph scoreMEDIUM confidence

Score 7.6 from GitHub Security Advisory (severity: HIGH) published 2026-06-19. The CNA's CVSS baseline 7.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — 4 sources updated this week
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.

CVSS v3
7.6
EG Score
7.6HIGHmedium confidence
EG Risk
34
EG Risk 34/100CISA SSVC

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
Severity76% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 19, 2026

Last Modified

October 2, 2026

Advisory Details (4)

Auto-updated Jun 22, 2026
Patch available. Sources: redhat.
generic

Chromium

https://issues.chromium.org/issues/504317456
redhat

2490799 – (CVE-2026-56208) CVE-2026-56208 libaom: libaom: heap buffer overflow in AV1 encoder first-pass stats buffer via LAP mode

https://bugzilla.redhat.com/show_bug.cgi?id=2490799
generic

243f8ae84b - aom - Git at Google

https://aomedia.googlesource.com/aom/+/243f8ae84b
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-56208

Vendor Advisories for CVE-2026-56208(20)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhai/base-image-rubin-rhel9:17881975122026-09-24redhat
redhatrhai/base-image-cuda-12.9-rhel9:17881973852026-09-24redhat
redhatrhai/base-image-tpu-rhel9:17881974922026-09-24redhat
redhatrhai/base-image-cuda-13.0-rhel9:17881979752026-09-24redhat
redhatrhai/base-image-rocm-7.14-rhel9:17881980162026-09-24redhat
redhatrhai/base-image-cpu-rhel9:17881984072026-09-24redhat
redhatrhai/base-image-neuron-rhel9:17881984042026-09-24redhat
redhatrhai/base-image-spyre-rhel9:17881976882026-09-24redhat
redhatrhai/base-image-gaudi-rhel9:17881975422026-09-24redhat
redhatrhai/base-image-cuda-12.9-rhel9:17881996222026-09-22redhat
redhatrhai/base-image-rocm-6.4-rhel9:17881976772026-09-22redhat
redhatrhai/base-image-tpu-rhel9:17881976802026-09-22redhat
redhatrhai/base-image-spyre-rhel9:17881977472026-09-22redhat
redhatrhai/base-image-rocm-7.1-rhel9:17881975492026-09-22redhat
redhatrhai/base-image-cpu-rhel9:17881975302026-09-22redhat
redhatrhai/base-image-cuda-13.0-rhel9:17881977442026-09-22redhat
redhatrhai/base-image-gaudi-rhel9:17881976322026-09-22redhat
redhatrhaiis/vllm-rocm-rhel9:17895043712026-09-17redhat
redhatrhaiis/vllm-cuda-rhel9:17895827762026-09-17redhat
redhatrhai/base-image-rocm-7.0-rhel9:17891375482026-09-17redhat
redhatrhai/base-image-cuda-13.0-rhel9:17891376362026-09-17redhat
redhatrhai/base-image-spyre-rhel9:17891376072026-09-17redhat
redhatrhai/base-image-cuda-12.9-rhel9:17891376362026-09-17redhat
redhatrhai/base-image-cpu-rhel9:17891376412026-09-17redhat
redhatrhai/base-image-tpu-rhel9:17891375482026-09-17redhat
redhatrhai/base-image-rocm-6.4-rhel9:17891375482026-09-17redhat
redhatrhai/base-image-neuron-rhel9:17891375522026-09-17redhat
redhatrhaiis/model-opt-cuda-rhel9:17895082872026-09-17redhat
redhatrhaiis/vllm-spyre-rhel9:17895024932026-09-17redhat
redhatrhaiis/vllm-rocm-rhel9:17878848732026-08-31redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
aom3.6.0-1, 3.6.0-1+deb12u1, 3.6.0-1+deb12u2
  • every version up to 3.6.0-1+deb12u3: fixed in 3.6.0-1+deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
aom3.12.1-1
  • every version up to 3.12.1-1+deb13u1: fixed in 3.12.1-1+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
aom3.12.1-1, 3.13.1-1, 3.13.1-1~exp1, 3.13.1-2
  • every version up to 3.14.1-1: fixed in 3.14.1-1
—

Weakness Classification(1)

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

All Vendor Advisories

(25)

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 16× in last 7d / 62× 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 462 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-56208?
CVE-2026-56208 is a high vulnerability published on June 19, 2026. A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when glagin_frames is set to 1 or higher. This results in a…
When was CVE-2026-56208 disclosed?
CVE-2026-56208 was first published on June 19, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56208 actively exploited?
CVE-2026-56208 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56208?
CVE-2026-56208 has a CVSS base score of 7.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56208?
A fix for CVE-2026-56208 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56208 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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