CVE-2026-71969

MEDIUMPre-NVD 6.76.7—
EchelonGraph scoreHIGH 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%CVSS: 6.7Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
6.7(high)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity67% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 17, 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.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 35× 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.

  1. 2026-08-19 20:41 UTCEG score recompute
  2. 2026-08-19 20:41 UTCGHSA enrichment
  3. 2026-08-19 17:04 UTCEPSS rescore
  4. 2026-08-18 20:04 UTCEG score recompute
  5. 2026-08-18 20:04 UTCGHSA enrichment
  6. 2026-08-18 13:49 UTCEPSS rescore
  7. 2026-08-18 13:49 UTCEPSS rescore
  8. 2026-08-17 19:28 UTCEG score recompute
  9. 2026-08-17 19:28 UTCGHSA enrichment
  10. 2026-08-17 19:12 UTCEG score recompute
  11. 2026-08-17 19:12 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 18:22 UTCEG score recompute
  14. 2026-08-16 18:22 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 02:15 UTCEPSS rescore
  18. 2026-08-15 17:46 UTCEG score recompute
  19. 2026-08-15 17:46 UTCGHSA enrichment
  20. 2026-08-15 01:31 UTCEPSS rescore
  21. 2026-08-14 17:10 UTCEG score recompute
  22. 2026-08-14 17:10 UTCGHSA enrichment
  23. 2026-08-13 22:17 UTCEG score recompute
  24. 2026-08-13 22:17 UTCGHSA enrichment
  25. 2026-08-13 22:00 UTCEPSS rescore
Show 10 more
  1. 2026-08-12 21:42 UTCEG score recompute
  2. 2026-08-12 21:42 UTCGHSA enrichment
  3. 2026-08-12 13:51 UTCEPSS rescore
  4. 2026-08-11 21:06 UTCEG score recompute
  5. 2026-08-11 21:06 UTCGHSA enrichment
  6. 2026-08-10 20:30 UTCEG score recompute
  7. 2026-08-10 20:05 UTCEG score recompute
  8. 2026-08-10 19:27 UTCEG score recompute
  9. 2026-08-10 18:35 UTCEG score recompute
  10. 2026-08-10 18:34 UTCMITRE cvelistV5first tracked

Related CVEs(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 in the National Vulnerability Database on August 10, 2026, with the most recent update on August 17, 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% probability of exploitation in the next 30 days, which ranks it in the top 96.6% of all scored CVEs.
What is the CVSS score of CVE-2026-71969?
CVE-2026-71969 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2026-71969?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71969, 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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