CVE-2026-56210

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-19. the CNA's CVSS baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

A heap-buffer-overflow read vulnerability was found in libaom, the reference AV1 codec implementation. A missing bounds check in the SVC (Scalable Video Coding) layer ID control function allows setting a spatial_layer_id exceeding the configured number of layers. This causes an out-of-bounds heap read of approximately 40,728 bytes when computing a layer context array index. An attacker who can influence SVC encoder parameters in a network-facing service could exploit this for information disclosure (heap content leak) or denial of service (segmentation fault from hitting unmapped memory).

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

June 19, 2026

Last Modified

August 18, 2026

Advisory Details (4)

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

Chromium

https://issues.chromium.org/issues/503975732
redhat

2490801 – (CVE-2026-56210) CVE-2026-56210 libaom: libaom: heap-buffer-overflow read via missing bounds check in ctrl_set_layer_id

https://bugzilla.redhat.com/show_bug.cgi?id=2490801
generic

a93ba0ffaa - aom - Git at Google

https://aomedia.googlesource.com/aom/+/a93ba0ffaa
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-56210

Vendor Advisories for CVE-2026-56210(5)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhataom-0:3.14.0-1.el9ai2026-08-06redhat
redhataom-main-3.14.0-0.1.hum12026-06-28redhat

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 rangeFixed inDependents
aom3.10.0-1 ... 3.9.1-1~exp1 (27 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
aom3.12.1-13.12.1-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
aom3.12.1-1, 3.13.1-1, 3.13.1-1~exp1, 3.13.1-23.14.1-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 39× in last 7d / 172× 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 301 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-56210?
CVE-2026-56210 is a high vulnerability published on June 19, 2026. A heap-buffer-overflow read vulnerability was found in libaom, the reference AV1 codec implementation. A missing bounds check in the SVC (Scalable Video Coding) layer ID control function allows setting a spatiallayerid exceeding the configured number of layers. This causes an out-of-bounds heap…
When was CVE-2026-56210 disclosed?
CVE-2026-56210 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56210 actively exploited?
CVE-2026-56210 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 78.5% of all scored CVEs.
What is the CVSS score of CVE-2026-56210?
CVE-2026-56210 has a CVSS v4.0 base score of 7.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-56210?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56210, 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.

Dependency Blast Radius

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