CVE-2026-71968

MEDIUMPre-NVD 6.76.7—
EchelonGraph scoreMEDIUM confidence

Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. A secondary CVSS source baseline 6.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.7Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

OP-TEE OS through 4.10.0, fixed in commit 8794043, contains a use-after-free vulnerability in the Trusted Application loader that allows attackers with the ability to load a signed Trusted Application to corrupt secure-world kernel memory by setting the TA_FLAG_CONCURRENT flag in a user TA signed header. Attackers can cause two concurrent sessions to operate on the same shared context without locking, corrupting the uctx->vm_info.regions list during memref parameter mapping and unmapping to free vm_region nodes still in use, resulting in a use-after-free in S-EL1 secure-world kernel memory.

CVSS v3
6.7
EG Score
6.7MEDIUMmedium confidence
EG Risk
30
EG Risk 30/100CISA 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
Severity67% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

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

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

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

August 10, 2026

Last Modified

September 24, 2026

Advisory Details (3)

Auto-updated Aug 10, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT | Advisories | VulnCheck

https://www.vulncheck.com/advisories/op-tee-os-use-after-free-via-trusted-application-loader-ta-flag-concurrent
github_commit

commit 8794043c4065 (OP-TEE/optee_os)

Fix landed in OP-TEE/optee_os commit 8794043c4065 — awaiting tagged release

https://github.com/OP-TEE/optee_os/commit/8794043c4065c26a2b8b1313794ba5ba5f06d296
github_pr

core: ldelf: reject TA_FLAG_CONCURRENT for user TAs

Fix merged in OP-TEE/optee_os PR #7900 on 2026-08-06 — awaiting tagged release

https://github.com/OP-TEE/optee_os/pull/7900

Vendor Advisories for CVE-2026-71968(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
optee-os4.10.0-1 ... 4.9.0-1 (6 versions)
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 64× 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 126 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-71968?
CVE-2026-71968 is a medium vulnerability published on August 10, 2026. OP-TEE OS through 4.10.0, fixed in commit 8794043, contains a use-after-free vulnerability in the Trusted Application loader that allows attackers with the ability to load a signed Trusted Application to corrupt secure-world kernel memory by setting the TAFLAGCONCURRENT flag in a user TA signed…
When was CVE-2026-71968 disclosed?
CVE-2026-71968 was first published on August 10, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71968 actively exploited?
CVE-2026-71968 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71968?
CVE-2026-71968 has a CVSS base score of 6.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-71968?
An upstream fix for CVE-2026-71968 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-71968 are linked in the Vendor Advisories panel on this page.

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