CVE-2026-3497

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory published 2026-03-12. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
80.2%
KEV
Not listed

Published

March 12, 2026

Last Modified

June 30, 2026

Advisory Details (10)

Auto-updated Jun 10, 2026
Patch available. Sources: ubuntu.
generic Patch Available

[SECURITY] [DLA 4535-1] openssh security update

https://lists.debian.org/debian-lts-announce/2026/04/msg00014.html
generic

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/7
generic

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/5
generic

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/4
generic

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/2
generic

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/14/4
generic

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/14/3
generic

oss-security - OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/12/3
generic

oss-security - OpenSSH GSSAPI keyex patch issue

https://www.openwall.com/lists/oss-security/2026/03/12/3
ubuntu Patch Available

CVE-2026-3497 | Ubuntu

https://ubuntu.com/security/CVE-2026-3497

Vendor Advisories for CVE-2026-3497(20)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntussh-askpass-gnome (1:8.9p1-3ubuntu0.14) @ jammy2026-06-12ubuntu
redhatrhaiis/model-opt-cuda-rhel9:17806819842026-06-10redhat
redhatrhcos-412.86.202605271418-02026-06-04redhat
redhatrhcos-413.92.202605271328-02026-06-04redhat
redhatrhcos-416.94.202605200242-02026-05-29redhat
redhatrhcos-4.19.9.6.202605201155-02026-05-27redhat
redhatrhcos-417.94.202605112123-02026-05-20redhat
redhatrhaiis/vllm-cuda-rhel9:17792236542026-05-20redhat
redhatrhaiis/vllm-rocm-rhel9:17792236512026-05-20redhat
redhatrhcos-415.92.202605060220-02026-05-13redhat
redhatrhcos-414.92.202605060243-02026-05-13redhat
redhatrhaiis/vllm-spyre-rhel9:17782445462026-05-12redhat
redhatrhaiis/vllm-rocm-rhel9:17782445312026-05-11redhat
redhatrhcos-418.94.202604240015-02026-05-11redhat
redhatrhaiis/vllm-cuda-rhel9:17782746662026-05-11redhat
redhatopenssh-0:8.0p1-15.el8_6.42026-05-11redhat
redhatrhaiis/model-opt-cuda-rhel9:17782445592026-05-11redhat
redhatopenssh-0:8.0p1-7.el8_4.12026-05-11redhat
redhatopenssh-0:8.0p1-20.el8_8.32026-05-07redhat
redhatopenssh-0:8.7p1-13.el9_0.22026-05-05redhat
redhatrhpam-7/rhpam-smartrouter-rhel8:7.13.5-4.17773257082026-05-05redhat
redhatopenssh-0:8.7p1-30.el9_2.102026-04-27redhat
redhatrhui5/rhua-rhel9:17768688422026-04-23redhat
redhatopenssh-0:8.7p1-38.el9_4.72026-04-22redhat
redhatopenssh-0:8.7p1-45.el9_6.22026-04-21redhat
redhatopenssh-0:9.9p1-7.el10_0.22026-04-08redhat
redhatopenssh-0:9.9p1-13.el10_12026-04-02redhat
redhatopenssh-0:8.7p1-48.el9_72026-04-02redhat
redhatopenssh-0:8.0p1-28.el8_102026-04-02redhat
redhatopenssh-main-10.2p1-9.hum12026-03-23redhat

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.

Weakness Classification(2)

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

Additional Vendor Advisories

(5)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× 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. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-09 19:10 UTCEPSS rescore
  4. 2026-07-08 15:15 UTCEPSS rescore
  5. 2026-07-07 13:46 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-01 15:06 UTCEPSS rescore
  13. 2026-06-30 23:22 UTCEPSS rescore
  14. 2026-06-29 14:06 UTCEPSS rescore
  15. 2026-06-28 14:07 UTCEPSS rescore
  16. 2026-06-28 04:56 UTCEPSS rescore
  17. 2026-06-27 03:08 UTCEPSS rescore
  18. 2026-06-25 13:49 UTCEPSS rescore
  19. 2026-06-25 13:49 UTCEPSS rescore
  20. 2026-06-24 14:05 UTCEPSS rescore
  21. 2026-06-23 21:33 UTCEPSS rescore
  22. 2026-06-22 14:25 UTCEPSS rescore
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-21 14:56 UTCEPSS rescore
  25. 2026-06-21 14:56 UTCEPSS rescore
Show 71 more
  1. 2026-06-21 01:59 UTCEPSS rescore
  2. 2026-06-19 19:25 UTCEPSS rescore
  3. 2026-06-18 17:52 UTCEPSS rescore
  4. 2026-06-18 17:52 UTCEPSS rescore
  5. 2026-06-17 17:53 UTCEPSS rescore
  6. 2026-06-16 17:52 UTCEPSS rescore
  7. 2026-06-15 17:49 UTCEPSS rescore
  8. 2026-06-13 23:00 UTCEPSS rescore
  9. 2026-06-12 23:12 UTCEPSS rescore
  10. 2026-06-12 23:12 UTCEPSS rescore
  11. 2026-06-12 00:15 UTCEG score recompute
  12. 2026-06-12 00:15 UTCVendor advisory
  13. 2026-06-12 00:15 UTCGHSA enrichment
  14. 2026-06-11 14:00 UTCEPSS rescore
  15. 2026-06-10 22:18 UTCEPSS rescore
  16. 2026-06-10 18:46 UTCEG score recompute
  17. 2026-06-10 18:46 UTCVendor advisory
  18. 2026-06-10 18:46 UTCGHSA enrichment
  19. 2026-06-10 13:22 UTCEPSS rescore
  20. 2026-06-10 06:05 UTCEG score recompute
  21. 2026-06-10 06:05 UTCVendor advisory
  22. 2026-06-10 06:05 UTCGHSA enrichment
  23. 2026-06-09 16:54 UTCEG score recompute
  24. 2026-06-09 16:54 UTCVendor advisory
  25. 2026-06-09 16:54 UTCGHSA enrichment
  26. 2026-06-08 14:17 UTCEPSS rescore
  27. 2026-06-08 14:17 UTCEPSS rescore
  28. 2026-06-08 03:31 UTCEG score recompute
  29. 2026-06-08 03:31 UTCVendor advisory
  30. 2026-06-08 03:31 UTCGHSA enrichment
  31. 2026-06-07 15:25 UTCEPSS rescore
  32. 2026-06-07 15:25 UTCEPSS rescore
  33. 2026-06-07 15:25 UTCEPSS rescore
  34. 2026-06-07 14:52 UTCEG score recompute▲ 7.50
  35. 2026-06-07 14:52 UTCVendor advisory
  36. 2026-06-07 14:52 UTCGHSA enrichment
  37. 2026-06-06 13:47 UTCEPSS rescore
  38. 2026-06-06 13:47 UTCEPSS rescore
  39. 2026-06-05 22:47 UTCEPSS rescore
  40. 2026-06-05 22:47 UTCEPSS rescore
  41. 2026-06-05 06:10 UTCEPSS rescore
  42. 2026-06-05 06:10 UTCEPSS rescore
  43. 2026-06-04 13:12 UTCEPSS rescore
  44. 2026-06-04 13:12 UTCEPSS rescore
  45. 2026-06-02 20:13 UTCEPSS rescore
  46. 2026-06-01 13:52 UTCEPSS rescore
  47. 2026-06-01 13:52 UTCEPSS rescore
  48. 2026-06-01 13:51 UTCEPSS rescore
  49. 2026-05-31 22:30 UTCEPSS rescore
  50. 2026-05-31 22:30 UTCEPSS rescore
  51. 2026-05-31 00:16 UTCEPSS rescore
  52. 2026-05-31 00:16 UTCEPSS rescore
  53. 2026-05-31 00:16 UTCEPSS rescore
  54. 2026-05-29 13:44 UTCEPSS rescore
  55. 2026-05-29 13:44 UTCEPSS rescore
  56. 2026-05-28 13:44 UTCEPSS rescore
  57. 2026-05-28 13:44 UTCEPSS rescore
  58. 2026-05-28 13:44 UTCEPSS rescore
  59. 2026-05-27 13:40 UTCEPSS rescore
  60. 2026-05-27 13:40 UTCEPSS rescore
  61. 2026-05-27 13:40 UTCEPSS rescore
  62. 2026-05-26 13:44 UTCEPSS rescore
  63. 2026-05-26 07:18 UTCEPSS rescore
  64. 2026-05-26 07:18 UTCEPSS rescore
  65. 2026-05-20 22:38 UTCEPSS rescore
  66. 2026-05-20 22:38 UTCEPSS rescore
  67. 2026-05-20 21:19 UTCEG score recompute
  68. 2026-05-20 21:19 UTCVendor advisory
  69. 2026-05-20 21:19 UTCGHSA enrichment
  70. 2026-05-20 11:22 UTCEPSS rescore
  71. 2026-05-20 11:22 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-3497?
CVE-2026-3497 is a high vulnerability published on March 12, 2026. Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpktdisconnect() on an error, which does not terminate the…
When was CVE-2026-3497 disclosed?
CVE-2026-3497 was first published in the National Vulnerability Database on March 12, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3497 actively exploited?
CVE-2026-3497 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-3497?
CVE-2026-3497 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-3497?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3497, 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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