CVE-2026-74705

CRITICALPre-NVD 10.010.0
EchelonGraph scoreMEDIUM confidence

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

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-22. A secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-64392 (ENISA EUVD) · GHSA-rcm8-q4cm-988v (GitHub Security Advisories)Source: ENISA EUVD

10.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 10.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

udp: fix potential use-after-free in tunnel segmentation

__skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head, the saved UDP header pointer is no longer valid.

Get the UDP header after the pull to avoid a potential use-after-free.

CVSS v3
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

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)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
42nd
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 (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days 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; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). 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 22, 2026

Last Modified

October 16, 2026

Advisory Details (8)

Auto-updated Oct 31, 2026
Patch available.
Web page

udp: fix potential use-after-free in tunnel segmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61
Web page

udp: fix potential use-after-free in tunnel segmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442
Web page

udp: fix potential use-after-free in tunnel segmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87
Web page

udp: fix potential use-after-free in tunnel segmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380fe
Web page

udp: fix potential use-after-free in tunnel segmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5d
Web page

udp: fix potential use-after-free in tunnel segmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92b
Web page

udp: fix potential use-after-free in tunnel segmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55
Web page

udp: fix potential use-after-free in tunnel segmentation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/19d89b13a43640b2da2f277ee462d919d988cb6f

Patch Availability(20)

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 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
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1
  • every version up to 6.12.107-1~deb12u1: fixed in 6.12.107-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (33 versions)
  • every version up to 6.12.105-1: fixed in 6.12.105-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (167 versions)
  • every version up to 7.1.9-1: fixed in 7.1.9-1
—

Additional Vendor Advisories

(6)

Data Freshness Timeline

(refreshed 31× in last 7d / 160× 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 it from the CNA feed. 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). Most recent first.

Showing the most recent 100 of 569 refreshes 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 469 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 23:39 UTCEG score recompute
  2. 2026-11-01 23:39 UTCVendor advisory
  3. 2026-11-01 23:38 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  4. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-11-01 01:06 UTCEG score recompute
  6. 2026-11-01 01:06 UTCVendor advisory
  7. 2026-11-01 01:06 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  8. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-31 02:29 UTCEG score recompute
  10. 2026-10-31 02:29 UTCVendor advisory
  11. 2026-10-31 02:29 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  12. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-10-30 03:56 UTCEG score recompute
  14. 2026-10-30 03:56 UTCVendor advisory
  15. 2026-10-30 03:56 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  16. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-29 05:23 UTCEG score recompute
  18. 2026-10-29 05:23 UTCVendor advisory
  19. 2026-10-29 05:23 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  20. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-28 06:50 UTCEG score recompute
  22. 2026-10-28 06:50 UTCVendor advisory
  23. 2026-10-28 06:50 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  24. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  25. 2026-10-27 08:17 UTCEG score recompute
Show 75 more
  1. 2026-10-27 08:17 UTCVendor advisory
  2. 2026-10-27 08:17 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  3. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-10-26 07:28 UTCEG score recompute
  5. 2026-10-26 07:28 UTCVendor advisory
  6. 2026-10-26 07:28 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  7. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-25 14:03 UTCEG score recompute
  9. 2026-10-25 08:56 UTCEG score recompute
  10. 2026-10-25 08:56 UTCVendor advisory
  11. 2026-10-25 08:56 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-10-24 10:23 UTCEG score recompute
  14. 2026-10-24 10:23 UTCVendor advisory
  15. 2026-10-24 10:23 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  16. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-10-23 11:50 UTCEG score recompute
  18. 2026-10-23 11:50 UTCVendor advisory
  19. 2026-10-23 11:50 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  20. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-10-22 13:17 UTCEG score recompute
  22. 2026-10-22 13:17 UTCVendor advisory
  23. 2026-10-22 13:16 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  24. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-10-21 14:42 UTCEG score recompute
  26. 2026-10-21 14:42 UTCVendor advisory
  27. 2026-10-21 14:42 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  28. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  29. 2026-10-20 15:30 UTCEG score recompute
  30. 2026-10-20 15:30 UTCVendor advisory
  31. 2026-10-20 15:29 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  32. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  33. 2026-10-19 16:11 UTCVendor advisory
  34. 2026-10-19 16:11 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  35. 2026-10-18 17:34 UTCEG score recompute
  36. 2026-10-18 17:34 UTCVendor advisory
  37. 2026-10-18 17:34 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  38. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  39. 2026-10-18 03:14 UTCEG score recompute
  40. 2026-10-17 19:01 UTCEG score recompute
  41. 2026-10-17 19:01 UTCVendor advisory
  42. 2026-10-17 19:00 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  43. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  44. 2026-10-16 20:26 UTCEG score recompute
  45. 2026-10-16 20:26 UTCVendor advisory
  46. 2026-10-16 20:26 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  47. 2026-10-16 19:25 UTCEG score recompute
  48. 2026-10-16 19:25 UTCVendor advisory
  49. 2026-10-16 19:25 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  50. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  51. 2026-10-15 19:52 UTCEG score recompute
  52. 2026-10-15 19:52 UTCVendor advisory
  53. 2026-10-15 19:51 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  54. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  55. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  56. 2026-10-14 13:28 UTCVendor advisory
  57. 2026-10-14 13:28 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  58. 2026-10-14 08:45 UTCEG score recompute
  59. 2026-10-14 08:45 UTCVendor advisory
  60. 2026-10-14 08:45 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  61. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  62. 2026-10-13 04:13 UTCEG score recompute
  63. 2026-10-13 04:13 UTCVendor advisory
  64. 2026-10-13 04:13 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  65. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  66. 2026-10-12 15:39 UTCEG score recompute
  67. 2026-10-12 05:38 UTCVendor advisory
  68. 2026-10-12 05:37 UTCGHSA enrichmentGHSA-rcm8-q4cm-988v · GitHub severity CRITICAL · GitHub CVSS 10.0
  69. 2026-10-11 19:25 UTCEG score recompute
  70. 2026-10-11 16:41 UTCEG score recompute
  71. 2026-10-11 14:00 UTCEG score recompute
  72. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  73. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  74. 2026-10-10 14:30 UTCEG score recompute
  75. 2026-10-10 14:30 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-74705?
CVE-2026-74705 is a critical-severity vulnerability; its CVE record was published on August 22, 2026. In the Linux kernel, the following vulnerability has been resolved: udp: fix potential use-after-free in tunnel segmentation __skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head, the saved UDP header pointer is no…
When was the CVE record for CVE-2026-74705 published?
The CVE record for CVE-2026-74705 was published on August 22, 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 October 16, 2026; the record at its source may have been updated since.
Is CVE-2026-74705 actively exploited?
CVE-2026-74705 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74705?
CVE-2026-74705 has a CVSS base score of 10.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74705?
A fix for CVE-2026-74705 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74705 are linked in the Vendor Advisories panel on this page.

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