CVE-2026-75900

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-08-19. A secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

An out-of-bounds read vulnerability was found in swtpm's SWTPM_NVRAM_CheckHeader() function. The entry guard checks the buffer length against sizeof(bh), where bh is a pointer, instead of sizeof(*bh), the actual struct size. This allows an undersized buffer to pass validation, causing a 2-byte heap overread on 64-bit systems (6 bytes on 32-bit) when accessing the totlen field. This may cause daemon termination on some platforms and leaks heap data to the log.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100CISA 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 19, 2026

Last Modified

August 21, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available. Sources: redhat.
redhat

2517910 – (CVE-2026-75900) CVE-2026-75900 swtpm: swtpm: Out-of-bounds read in SWTPM_NVRAM_CheckHeader due to sizeof(pointer) vs sizeof(struct) mismatch

https://bugzilla.redhat.com/show_bug.cgi?id=2517910
redhat Patch Available

CVE-2026-75900 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-75900

Vendor Advisories for CVE-2026-75900(2)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
swtpm0.10.1+ds-1, 0.10.2-1, 0.7.1-1.3, 0.7.1-1.4, 0.7.1-1.5
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
swtpm0.10.1+ds-1, 0.10.2-1, 0.7.1-1.5
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
swtpm0.10.1+ds-1, 0.7.1-1.5
  • every version up to 0.10.2-1: fixed in 0.10.2-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 86× 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 141 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Same product

1 shown

Debian:12:swtpm

Frequently asked(5)

What is CVE-2026-75900?
CVE-2026-75900 is a medium vulnerability published on August 19, 2026. An out-of-bounds read vulnerability was found in swtpm's SWTPMNVRAMCheckHeader() function. The entry guard checks the buffer length against sizeof(bh), where bh is a pointer, instead of sizeof(*bh), the actual struct size. This allows an undersized buffer to pass validation, causing a 2-byte heap…
When was CVE-2026-75900 disclosed?
CVE-2026-75900 was first published on August 19, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75900 actively exploited?
CVE-2026-75900 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75900?
CVE-2026-75900 has a CVSS base score of 6.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75900?
A fix for CVE-2026-75900 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-75900 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-75900

Explore →

Is Your Infrastructure Affected by CVE-2026-75900?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs