CVE-2026-68300

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-10. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

sctp: auth: verify auth requirement when auth_chunk is NULL

sctp_auth_chunk_verify() returns true unconditionally when chunk->auth_chunk is NULL, silently skipping authentication. This is incorrect when:

  • skb_clone() failed in the BH receive path, leaving auth_chunk
NULL. In sctp_endpoint_bh_rcv() asoc is NULL for new connections, so the early sctp_auth_recv_cid() check cannot catch this.
  • No AUTH chunk precedes COOKIE-ECHO, so skb_clone() is never
called and auth_chunk remains NULL.

Fix by checking sctp_auth_recv_cid() when auth_chunk is NULL: if authentication is required, return false to drop the chunk; otherwise continue normally.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 19, 2026

Advisory Details (8)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

sctp: auth: verify auth requirement when auth_chunk is NULL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ec2e157fc9678a9bc411305a25aec3fd337d7efb
generic

sctp: auth: verify auth requirement when auth_chunk is NULL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a129792b3aef15002746c13522781d92ed3522c3
generic

sctp: auth: verify auth requirement when auth_chunk is NULL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8e04823c120b376ef7dab14b60ebf6823aa16c14
generic

sctp: auth: verify auth requirement when auth_chunk is NULL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/83f5031f2a6a49d696eb4cc0898345d12f9c6451
generic

sctp: auth: verify auth requirement when auth_chunk is NULL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6caf0e8590c0bf05a76b0d387726adf3a6f3725c
generic

sctp: auth: verify auth requirement when auth_chunk is NULL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5a022ac51ad83b4ce6c898f4b9eefc65bd26b247
generic

sctp: auth: verify auth requirement when auth_chunk is NULL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/28c5fdce9dd955d2baf5e28987819b6d7cfaf646
generic

sctp: auth: verify auth requirement when auth_chunk is NULL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/18957373920caf5cdaf5cf32e5d1d7a99ca7700a

Vendor Advisories for CVE-2026-68300(5)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1035.38) @ noble2026-09-19ubuntu
redhatkernel-0:5.14.0-687.47.1.el9_82026-09-14redhat
redhatkernel-rt-0:4.18.0-553.162.1.rt7.503.el8_102026-09-10redhat
redhatkernel-0:4.18.0-553.162.1.el8_102026-09-10redhat

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.

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)6.1.187-1—
linux-6.126.12.100-1~deb12u16.12.101-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.12.96-1 (32 versions)6.12.101-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (160 versions)7.1.6-1—

Additional Vendor Advisories

(1)

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 72× in last 7d / 309× 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 376 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-68300?
CVE-2026-68300 is a critical vulnerability published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: sctp: auth: verify auth requirement when auth_chunk is NULL sctpauthchunk_verify() returns true unconditionally when chunk->auth_chunk is NULL, silently skipping authentication. This is incorrect when: 1. skbclone() failed in the…
When was CVE-2026-68300 disclosed?
CVE-2026-68300 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68300 actively exploited?
CVE-2026-68300 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.8% of all scored CVEs.
What is the CVSS score of CVE-2026-68300?
CVE-2026-68300 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-68300?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68300, 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.

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