CVE-2026-98320

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-10-06. A secondary CVSS source baseline 7.8; 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-2026-93305 (ENISA EUVD) · GHSA-7rm7-mf5x-673x (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
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: 0.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

netfilter: flowtable: hold reference on ct until flow is released

nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe semantics also allow to refer to the wrong conntrack from the flowtable datapath. Hold reference on ct until flow is released after rcu grace period.

Add rcu_barrier() on module exit path, to ensure pending flow entries are release before module goes away.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 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
0.1%
EPSS %ILE
3rd
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% 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

October 6, 2026

Last Modified

October 19, 2026

Advisory Details (8)

Auto-updated Oct 7, 2026
Patch available.
Web page

netfilter: flowtable: hold reference on ct until flow is released - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d
Web page

netfilter: flowtable: hold reference on ct until flow is released - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d9e6175a3ee48209ee65f294fc567b4e16b29b74
Web page

netfilter: flowtable: hold reference on ct until flow is released - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/12c1ac230f4ca16e0017b62a963ab75e0b48074f
Web page

netfilter: flowtable: hold reference on ct until flow is released - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8274cdc5f9c57e17ed77fc4ba76212536c840f25
Web page

netfilter: flowtable: hold reference on ct until flow is released - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a43cd2b67b91e943273c913237a7a88c50cdcfbc
Web page

netfilter: flowtable: hold reference on ct until flow is released - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/61c6688be282277c6e91ab286a7acd0ae8681ac6
Web page

netfilter: flowtable: hold reference on ct until flow is released - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eed6997e8dc40593a539fcc722e7ed51b18db86c
Web page

netfilter: flowtable: hold reference on ct until flow is released - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/93ff1594be1aad4da364462dd8db050ebcfda2de

Patch Availability(21)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:5.14.0-741.20.1.el9_92026-11-11redhat
redhatkernel-0:6.12.0-264.14.1.el10_32026-11-11redhat
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-42.42) @ resolute2026-11-11ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1067.70.1) @ noble2026-11-11ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1067.71~22.04.1) @ jammy2026-11-11ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1064.65) @ noble2026-11-11ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1070.70) @ jammy2026-11-11ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1017.17) @ resolute2026-11-11ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1113.111) @ jammy2026-11-11ubuntu
ubuntulinux-vmware-tools-6.8.0-1010 (6.8.0-1010.10) @ noble2026-11-11ubuntu
ubuntulinux-tools-realtime-hwe-26.04-edge (7.0.0-43.43.1) @ resolute2026-11-11ubuntu
ubuntulinux-tools-azure-lts-26.04 (7.0.0-1020.21) @ resolute2026-11-11ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1071.78~22.04.1) @ jammy2026-11-11ubuntu
ubuntulinux-tools-nvidia-64k-6.8 (6.8.0-1067.70) @ noble2026-11-11ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1071.78) @ noble2026-11-11ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.202.174) @ jammy2026-11-11ubuntu
redhatopenshift/ose-rhel-coreos-9:5.0.10.2.202611022203-02026-11-09redhat
redhatopenshift/ose-rhel-coreos-9:4.22.9.8.202611032353-02026-11-06redhat
redhatkernel-0:5.14.0-687.61.1.el9_82026-10-26redhat
redhatkernel-rt-0:4.18.0-553.176.1.rt7.517.el8_102026-10-20redhat
redhatkernel-0:4.18.0-553.176.1.el8_102026-10-20redhat

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 (57 versions)
  • every version up to 6.1.190-1: fixed in 6.1.190-1
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1, 6.12.111-1~deb12u1
  • every version up to 6.12.113-1~deb12u1: fixed in 6.12.113-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (36 versions)
  • every version up to 6.12.113-1: fixed in 6.12.113-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (182 versions)
  • every version up to 7.2.8-1: fixed in 7.2.8-1
—

Additional Vendor Advisories

(15)

Data Freshness Timeline

(refreshed 9× in last 7d / 41× 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.

  1. 2026-11-12 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-11-11 17:54 UTCEchelonGraph re-scored
  3. 2026-11-11 17:54 UTCVendor advisory
  4. 2026-11-11 17:53 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  5. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-11-10 16:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-11-09 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-11-08 16:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-11-06 16:40 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-11-05 09:33 UTCEchelonGraph re-scored
  12. 2026-11-05 09:33 UTCVendor advisory
  13. 2026-11-05 09:33 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-11-02 20:07 UTCEchelonGraph re-scored
  17. 2026-11-02 20:07 UTCVendor advisory
  18. 2026-11-02 20:07 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  19. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 72 more
  1. 2026-10-27 12:04 UTCEchelonGraph re-scored
  2. 2026-10-27 12:04 UTCVendor advisory
  3. 2026-10-27 12:04 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  4. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-25 13:47 UTCEchelonGraph re-scored
  7. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-19 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-19 10:28 UTCEchelonGraph re-scored
  14. 2026-10-19 10:28 UTCVendor advisory
  15. 2026-10-19 10:28 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  16. 2026-10-19 09:42 UTCEchelonGraph re-scored
  17. 2026-10-19 09:42 UTCVendor advisory
  18. 2026-10-19 09:41 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  19. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-10-18 02:55 UTCEchelonGraph re-scored
  21. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-10-13 03:57 UTCEchelonGraph re-scored
  27. 2026-10-13 03:57 UTCVendor advisory
  28. 2026-10-13 03:57 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  29. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-10-12 14:38 UTCEchelonGraph re-scored
  31. 2026-10-11 21:34 UTCVendor advisory
  32. 2026-10-11 21:34 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  33. 2026-10-11 19:10 UTCEchelonGraph re-scored
  34. 2026-10-11 16:25 UTCEchelonGraph re-scored
  35. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  36. 2026-10-11 13:37 UTCEchelonGraph re-scored
  37. 2026-10-11 09:20 UTCVendor advisory
  38. 2026-10-11 09:20 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  39. 2026-10-10 21:07 UTCEchelonGraph re-scored
  40. 2026-10-10 21:07 UTCVendor advisory
  41. 2026-10-10 21:07 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  42. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  43. 2026-10-10 08:50 UTCVendor advisory
  44. 2026-10-10 08:50 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  45. 2026-10-09 20:37 UTCEchelonGraph re-scored
  46. 2026-10-09 20:37 UTCVendor advisory
  47. 2026-10-09 20:37 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  48. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  49. 2026-10-09 08:23 UTCVendor advisory
  50. 2026-10-09 08:23 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  51. 2026-10-08 20:09 UTCEchelonGraph re-scored
  52. 2026-10-08 20:09 UTCVendor advisory
  53. 2026-10-08 20:09 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  54. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  55. 2026-10-08 07:56 UTCEchelonGraph re-scored
  56. 2026-10-08 07:56 UTCVendor advisory
  57. 2026-10-08 07:56 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  58. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  59. 2026-10-07 19:43 UTCEchelonGraph re-scored
  60. 2026-10-07 19:43 UTCVendor advisory
  61. 2026-10-07 19:43 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x · GitHub severity HIGH · GitHub CVSS 7.8
  62. 2026-10-07 07:29 UTCEchelonGraph re-scored
  63. 2026-10-07 07:29 UTCVendor advisory
  64. 2026-10-07 07:29 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x
  65. 2026-10-07 06:57 UTCEchelonGraph re-scoredFirst assessed: 7.8 HIGH
  66. 2026-10-07 06:57 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x
  67. 2026-10-07 06:56 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  68. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  69. 2026-10-06 09:33 UTCGHSA enrichmentGHSA-7rm7-mf5x-673x
  70. 2026-10-06 09:28 UTCNVD update
  71. 2026-10-06 08:54 UTCEchelonGraph re-scored
  72. 2026-10-06 08:52 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-98320?
CVE-2026-98320 is a high-severity vulnerability; its CVE record was published on October 6, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: hold reference on ct until flow is released nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe semantics also allow to refer to the wrong conntrack from the flowtable datapath. Hold reference…
When was the CVE record for CVE-2026-98320 published?
The CVE record for CVE-2026-98320 was published on October 6, 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 19, 2026; the record at its source may have been updated since.
Is CVE-2026-98320 actively exploited?
CVE-2026-98320 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-98320?
CVE-2026-98320 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-98320?
A fix for CVE-2026-98320 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-98320 are linked in the Vendor Advisories panel on this page.

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