CVE-2026-68476

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-15. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — Patch released this week

Also known asEUVD-2026-59098 (ENISA EUVD) · GHSA-3fqj-wv67-hq22 (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

ipvs: reload ip header after head reallocation

__ip_vs_get_out_rt() calls skb_ensure_writable() which may reallocate skb->head.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.7%
EPSS %ILE
54th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 15, 2026

Last Modified

September 2, 2026

Advisory Details (8)

Auto-updated Nov 9, 2026
Patch available.
Web page

ipvs: reload ip header after head reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e51687fc56c2e39ea6e9532925f1aabd4d529f61
Web page

ipvs: reload ip header after head reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ad1e14710b360bda087ebf9fb82460eb5ef775de
Web page

ipvs: reload ip header after head reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ac6ac3d35bfc0ade9d17d354c84e503a946ebdab
Web page

ipvs: reload ip header after head reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a2f57827bf7c695b8c72dc4511cae8e86582369d
Web page

ipvs: reload ip header after head reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a10f5080afbed242640f2984328de25f84557da1
Web page

ipvs: reload ip header after head reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/657118cad620172dfd8f6ed5717fd75c0d1f7a5a
Web page

ipvs: reload ip header after head reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7
Web page

ipvs: reload ip header after head reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3fb7edd2018bb1ad0a68157383d9b9dac33dd645

Patch Availability(27)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:5.14.0-570.155.1.el9_62026-11-11redhat
redhatkernel-0:5.14.0-427.162.1.el9_42026-11-11redhat
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1071.78~22.04.1) @ jammy2026-11-11ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1113.111) @ jammy2026-11-11ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1070.70) @ jammy2026-11-11ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-34.34) @ resolute2026-11-11ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2056.58) @ noble2026-11-11ubuntu
ubuntulinux-tools-oracle-edge (7.0.0-1012.12~24.04.1) @ noble2026-11-11ubuntu
ubuntulinux-tools-gke-hwe-26.04 (7.0.0-1007.8) @ resolute2026-11-11ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1035.38) @ noble2026-11-11ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1014.14) @ resolute2026-11-11ubuntu
ubuntulinux-tools-azure-fde-edge (7.0.0-1016.16~24.04.1) @ noble2026-11-11ubuntu
ubuntulinux-tools-azure-lts-26.04 (7.0.0-1017.17) @ resolute2026-11-11ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1071.79) @ noble2026-11-11ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.202.174) @ jammy2026-11-11ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1067.70.1) @ noble2026-11-11ubuntu
ubuntulinux-virtual-6.8 (6.8.0-147.147) @ noble2026-11-11ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2022.23) @ resolute2026-11-11ubuntu
ubuntulinux-tools-nvidia-64k-6.8 (6.8.0-1067.70) @ noble2026-11-11ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1124.133) @ jammy2026-11-11ubuntu
redhatkernel-0:4.18.0-372.227.1.el8_62026-11-04redhat
redhatkernel-0:4.18.0-305.217.1.el8_42026-11-03redhat
redhatkernel-0:5.14.0-687.61.1.el9_82026-10-26redhat
redhatkernel-0:4.18.0-553.178.1.el8_102026-10-24redhat
redhatkernel-rt-0:4.18.0-553.178.1.rt7.519.el8_102026-10-24redhat
redhatkernel-0:6.12.0-211.63.1.el10_22026-10-08redhat
linuxKernel @ 5.10.269 (fixes >=4.10.0)—osv

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)
  • every version up to 6.1.187-1: fixed in 6.1.187-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.96-1 (31 versions)
  • every version up to 6.12.100-1: fixed in 6.12.100-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (160 versions)
  • every version up to 7.1.5-1: fixed in 7.1.5-1
—

Additional Vendor Advisories

(17)

Data Freshness Timeline

(refreshed 22× in last 7d / 90× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 563 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 463 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  2. 2026-11-12 09:29 UTCEchelonGraph re-scored
  3. 2026-11-12 09:29 UTCVendor advisory
  4. 2026-11-12 09:29 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  6. 2026-11-11 10:43 UTCEchelonGraph re-scored
  7. 2026-11-11 10:43 UTCVendor advisory
  8. 2026-11-11 10:43 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  10. 2026-11-10 11:57 UTCEchelonGraph re-scored
  11. 2026-11-10 11:57 UTCVendor advisory
  12. 2026-11-10 11:57 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  14. 2026-11-09 13:12 UTCEchelonGraph re-scored
  15. 2026-11-09 13:12 UTCVendor advisory
  16. 2026-11-09 13:12 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  18. 2026-11-08 14:24 UTCEchelonGraph re-scored
  19. 2026-11-08 14:24 UTCVendor advisory
  20. 2026-11-08 14:24 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  22. 2026-11-07 15:35 UTCVendor advisory
  23. 2026-11-07 15:35 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-11-06 16:49 UTCEchelonGraph re-scored
  25. 2026-11-06 16:49 UTCVendor advisory
Show 75 more
  1. 2026-11-06 16:49 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  3. 2026-11-06 15:55 UTCOSV refresh
  4. 2026-11-05 18:03 UTCEchelonGraph re-scored
  5. 2026-11-05 18:03 UTCVendor advisory
  6. 2026-11-05 18:03 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  8. 2026-11-04 19:17 UTCEchelonGraph re-scored
  9. 2026-11-04 19:17 UTCVendor advisory
  10. 2026-11-04 19:17 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  12. 2026-11-03 20:31 UTCEchelonGraph re-scored
  13. 2026-11-03 20:31 UTCVendor advisory
  14. 2026-11-03 20:31 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  16. 2026-11-02 21:45 UTCEchelonGraph re-scored
  17. 2026-11-02 21:45 UTCVendor advisory
  18. 2026-11-02 21:45 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  20. 2026-11-01 23:00 UTCEchelonGraph re-scored
  21. 2026-11-01 23:00 UTCVendor advisory
  22. 2026-11-01 22:59 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  24. 2026-11-01 00:13 UTCEchelonGraph re-scored
  25. 2026-11-01 00:13 UTCVendor advisory
  26. 2026-11-01 00:13 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  28. 2026-10-31 01:28 UTCEchelonGraph re-scored
  29. 2026-10-31 01:28 UTCVendor advisory
  30. 2026-10-31 01:28 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  32. 2026-10-30 02:42 UTCEchelonGraph re-scored
  33. 2026-10-30 02:42 UTCVendor advisory
  34. 2026-10-30 02:42 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  35. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  36. 2026-10-29 03:57 UTCEchelonGraph re-scored
  37. 2026-10-29 03:57 UTCVendor advisory
  38. 2026-10-29 03:57 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  40. 2026-10-28 05:08 UTCEchelonGraph re-scored
  41. 2026-10-28 05:08 UTCVendor advisory
  42. 2026-10-28 05:08 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  43. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  44. 2026-10-27 06:23 UTCEchelonGraph re-scored
  45. 2026-10-27 06:23 UTCVendor advisory
  46. 2026-10-27 06:22 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  47. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  48. 2026-10-26 03:38 UTCEchelonGraph re-scored
  49. 2026-10-26 03:38 UTCVendor advisory
  50. 2026-10-26 03:38 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  52. 2026-10-25 14:10 UTCEchelonGraph re-scored
  53. 2026-10-25 04:53 UTCEchelonGraph re-scored
  54. 2026-10-25 04:53 UTCVendor advisory
  55. 2026-10-25 04:52 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  56. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  57. 2026-10-24 06:07 UTCEchelonGraph re-scored
  58. 2026-10-24 06:07 UTCVendor advisory
  59. 2026-10-24 06:06 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  61. 2026-10-23 07:21 UTCEchelonGraph re-scored
  62. 2026-10-23 07:21 UTCVendor advisory
  63. 2026-10-23 07:20 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  64. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  65. 2026-10-22 08:32 UTCEchelonGraph re-scored
  66. 2026-10-22 08:32 UTCVendor advisory
  67. 2026-10-22 08:32 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  69. 2026-10-21 09:46 UTCEchelonGraph re-scored
  70. 2026-10-21 09:46 UTCVendor advisory
  71. 2026-10-21 09:45 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  73. 2026-10-20 11:00 UTCEchelonGraph re-scored
  74. 2026-10-20 11:00 UTCVendor advisory
  75. 2026-10-20 11:00 UTCGHSA enrichmentGHSA-3fqj-wv67-hq22 · GitHub severity CRITICAL · GitHub CVSS 9.8

Frequently asked(5)

What is CVE-2026-68476?
CVE-2026-68476 is a critical-severity vulnerability; its CVE record was published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: ipvs: reload ip header after head reallocation __ip_vs_get_out_rt() calls skb_ensure_writable() which may reallocate skb->head.
When was the CVE record for CVE-2026-68476 published?
The CVE record for CVE-2026-68476 was published on August 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 2, 2026; the record at its source may have been updated since.
Is CVE-2026-68476 actively exploited?
CVE-2026-68476 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-68476?
CVE-2026-68476 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-68476?
A fix for CVE-2026-68476 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-68476 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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