CVE-2026-71969

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: 0.2%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 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an input length exceeding the RSA modulus size. When src_len exceeds rsa_len, the subtraction expression wraps to a large unsigned value, causing a subsequent memcpy to write attacker-controlled data before the destination buffer in S-EL1 secure-world heap 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
0.2%
EPSS %ILE
7th
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 (4)

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

OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations | Advisories | VulnCheck

https://www.vulncheck.com/advisories/op-tee-os-buffer-underwrite-via-rsa-nopad-encrypt-decrypt-operations
github_commit

commit 7b8b494e0a32 (OP-TEE/optee_os)

Fix landed in OP-TEE/optee_os commit 7b8b494e0a32 — awaiting tagged release

https://github.com/OP-TEE/optee_os/commit/7b8b494e0a324cefec8ed386b7de413b44f1aaf3
github_pr

Se050 fix

Fix merged in OP-TEE/optee_os PR #7808 on 2026-08-03 — awaiting tagged release

https://github.com/OP-TEE/optee_os/pull/7808
github_pr

crypto: rsa: reject RSA NOPAD input longer than the modulus

Upstream fix in progress (PR #7898 · OP-TEE/optee_os, state=closed)

https://github.com/OP-TEE/optee_os/pull/7898

Vendor Advisories for CVE-2026-71969(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 / 66× 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 139 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 13:18 UTCEG score recompute
  15. 2026-09-28 13:18 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. 2026-09-23 23:36 UTCEG score recompute
  23. 2026-09-23 23:36 UTCGHSA enrichment
  24. 2026-09-23 17:54 UTCEPSS rescore
  25. 2026-09-22 22:37 UTCEG score recompute
Show 75 more
  1. 2026-09-22 22:37 UTCGHSA enrichment
  2. 2026-09-21 22:01 UTCEG score recompute
  3. 2026-09-21 22:01 UTCGHSA enrichment
  4. 2026-09-21 21:09 UTCEPSS rescore
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-20 20:04 UTCGHSA enrichment
  7. 2026-09-19 17:53 UTCEG score recompute
  8. 2026-09-19 17:53 UTCGHSA enrichment
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 17:17 UTCEG score recompute
  11. 2026-09-18 17:17 UTCGHSA enrichment
  12. 2026-09-17 14:53 UTCEG score recompute
  13. 2026-09-17 14:53 UTCGHSA enrichment
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 10:59 UTCEG score recompute
  16. 2026-09-16 10:59 UTCGHSA enrichment
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 09:43 UTCEG score recompute
  19. 2026-09-15 09:43 UTCGHSA enrichment
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 09:07 UTCEG score recompute
  22. 2026-09-14 09:07 UTCGHSA enrichment
  23. 2026-09-13 08:32 UTCEG score recompute
  24. 2026-09-13 08:32 UTCGHSA enrichment
  25. 2026-09-12 15:02 UTCEPSS rescore
  26. 2026-09-12 07:56 UTCEG score recompute
  27. 2026-09-12 07:56 UTCGHSA enrichment
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 07:03 UTCEG score recompute
  30. 2026-09-11 07:03 UTCGHSA enrichment
  31. 2026-09-10 09:35 UTCEPSS rescore
  32. 2026-09-10 06:27 UTCEG score recompute
  33. 2026-09-10 06:27 UTCGHSA enrichment
  34. 2026-09-09 05:51 UTCEG score recompute
  35. 2026-09-09 05:51 UTCGHSA enrichment
  36. 2026-09-08 22:01 UTCEPSS rescore
  37. 2026-09-07 17:16 UTCEG score recompute
  38. 2026-09-07 17:16 UTCGHSA enrichment
  39. 2026-09-06 13:48 UTCEPSS rescore
  40. 2026-09-06 04:32 UTCEG score recompute
  41. 2026-09-06 04:32 UTCGHSA enrichment
  42. 2026-09-05 03:56 UTCEG score recompute
  43. 2026-09-05 03:56 UTCGHSA enrichment
  44. 2026-09-04 05:07 UTCEPSS rescore
  45. 2026-09-04 03:20 UTCGHSA enrichment
  46. 2026-09-03 02:30 UTCEG score recompute
  47. 2026-09-03 02:30 UTCGHSA enrichment
  48. 2026-09-02 14:12 UTCEPSS rescore
  49. 2026-09-01 13:54 UTCEPSS rescore
  50. 2026-09-01 13:36 UTCEG score recompute
  51. 2026-09-01 13:36 UTCGHSA enrichment
  52. 2026-09-01 04:40 UTCEPSS rescore
  53. 2026-08-31 11:51 UTCEG score recompute
  54. 2026-08-31 11:51 UTCGHSA enrichment
  55. 2026-08-30 19:17 UTCEPSS rescore
  56. 2026-08-30 10:39 UTCEG score recompute
  57. 2026-08-30 10:39 UTCGHSA enrichment
  58. 2026-08-30 01:22 UTCEPSS rescore
  59. 2026-08-29 09:56 UTCEG score recompute
  60. 2026-08-29 09:56 UTCGHSA enrichment
  61. 2026-08-28 21:42 UTCEPSS rescore
  62. 2026-08-28 01:33 UTCEG score recompute
  63. 2026-08-28 01:33 UTCGHSA enrichment
  64. 2026-08-27 00:57 UTCEG score recompute
  65. 2026-08-27 00:57 UTCGHSA enrichment
  66. 2026-08-26 14:47 UTCEPSS rescore
  67. 2026-08-26 00:21 UTCEG score recompute
  68. 2026-08-26 00:21 UTCGHSA enrichment
  69. 2026-08-25 13:49 UTCEPSS rescore
  70. 2026-08-24 23:43 UTCEG score recompute
  71. 2026-08-24 23:43 UTCGHSA enrichment
  72. 2026-08-23 23:07 UTCGHSA enrichment
  73. 2026-08-22 22:31 UTCEG score recompute
  74. 2026-08-22 22:31 UTCGHSA enrichment
  75. 2026-08-21 23:49 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-71969?
CVE-2026-71969 is a medium vulnerability published on August 10, 2026. OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an…
When was CVE-2026-71969 disclosed?
CVE-2026-71969 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-2026-71969 actively exploited?
CVE-2026-71969 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71969?
CVE-2026-71969 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-2026-71969?
An upstream fix for CVE-2026-71969 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-2026-71969 are linked in the Vendor Advisories panel on this page.

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