CVE-2026-72350

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 2026-08-15. 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 — 4 sources updated this week
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: 0.2%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: xt_u32: reject invalid shift counts

u32_match_it() executes rule-supplied shift operands on a 32-bit value. A malformed u32 rule can provide a shift count of 32 or more, triggering an undefined shift out-of-bounds during packet evaluation.

Validate XT_U32_LEFTSH and XT_U32_RIGHTSH operands in u32_mt_checkentry() and reject malformed rules before they reach the packet path.

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.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.2%
EPSS %ILE
6th
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
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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: 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 (CISA Vulnrichment) · Automatable no (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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 15, 2026

Last Modified

October 16, 2026

Advisory Details (8)

Auto-updated Aug 17, 2026
Patch available.
Web page

netfilter: xt_u32: reject invalid shift counts - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cce42014415cecd98aa49b3950e7b02ee7c81268
Web page

netfilter: xt_u32: reject invalid shift counts - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ca7c92d9701249e6daf132087756a88cbf2bb2a3
Web page

netfilter: xt_u32: reject invalid shift counts - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b33b44250d57ab0e5a1e2571b5285fb0d0a7f382
Web page

netfilter: xt_u32: reject invalid shift counts - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a597a722fb71a534138c20359b655726622b5f17
Web page

netfilter: xt_u32: reject invalid shift counts - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/728f479dc0447ae7eaef87926ff49142e415a811
Web page

netfilter: xt_u32: reject invalid shift counts - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/64cdf7d30ac18e43df6c48004435febb965809a8
Web page

netfilter: xt_u32: reject invalid shift counts - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0a8b7a6d763775709c601f584e709ae48bcc000a
Web page

netfilter: xt_u32: reject invalid shift counts - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/00d034fe8230dfc5832fe011ff2d81c1a2cc7a29

Vendor Advisories for CVE-2026-72350(1)

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

Patch Availability(15)

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 (55 versions)
  • every version up to 6.1.180-1: fixed in 6.1.180-1
—
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
—

All Vendor Advisories

(15)

Data Freshness Timeline

(refreshed 14× in last 7d / 78× 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 213 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 113 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-18 03:16 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-10-16 19:41 UTCEG score recompute
  6. 2026-10-16 19:41 UTCVendor advisory
  7. 2026-10-16 19:40 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  8. 2026-10-16 19:02 UTCEG score recompute
  9. 2026-10-16 19:02 UTCVendor advisory
  10. 2026-10-16 19:02 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  11. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-13 08:15 UTCEG score recompute
  16. 2026-10-13 08:15 UTCVendor advisory
  17. 2026-10-13 08:14 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-10-12 15:42 UTCEG score recompute
  20. 2026-10-11 19:27 UTCEG score recompute
  21. 2026-10-11 16:43 UTCEG score recompute
  22. 2026-10-11 14:03 UTCEG score recompute
  23. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  25. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
Show 75 more
  1. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-06 22:39 UTCEG score recompute
  4. 2026-10-06 22:39 UTCVendor advisory
  5. 2026-10-06 22:39 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-06 09:15 UTCEG score recompute
  8. 2026-10-06 09:15 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  9. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-10-05 12:34 UTCEG score recompute
  11. 2026-10-05 12:34 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  12. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-04 22:03 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-10-04 08:19 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  15. 2026-10-03 19:34 UTCEG score recompute
  16. 2026-10-03 19:34 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-02 21:46 UTCEG score recompute
  19. 2026-10-02 21:46 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  20. 2026-10-02 07:11 UTCEG score recompute
  21. 2026-10-02 07:11 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-10-01 09:54 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  24. 2026-09-30 21:09 UTCEG score recompute
  25. 2026-09-30 21:09 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  26. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  27. 2026-09-29 02:40 UTCEG score recompute
  28. 2026-09-29 02:40 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  29. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  30. 2026-09-28 12:02 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  31. 2026-09-27 23:02 UTCEG score recompute
  32. 2026-09-27 23:02 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  33. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  34. 2026-09-27 08:39 UTCEG score recompute
  35. 2026-09-27 08:39 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  36. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  37. 2026-09-25 02:43 UTCEG score recompute
  38. 2026-09-25 02:43 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  39. 2026-09-24 11:04 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  40. 2026-09-23 22:20 UTCEG score recompute
  41. 2026-09-23 22:20 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  42. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  43. 2026-09-23 09:35 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  44. 2026-09-22 20:51 UTCEG score recompute
  45. 2026-09-22 20:51 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  46. 2026-09-22 08:06 UTCEG score recompute
  47. 2026-09-22 08:06 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  48. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  49. 2026-09-21 19:19 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  50. 2026-09-21 03:56 UTCEG score recompute
  51. 2026-09-21 03:56 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  52. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  53. 2026-09-20 15:09 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  54. 2026-09-20 01:21 UTCEG score recompute
  55. 2026-09-20 01:21 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  56. 2026-09-19 12:36 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  57. 2026-09-18 23:50 UTCEG score recompute
  58. 2026-09-18 23:50 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  59. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  60. 2026-09-18 10:59 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  61. 2026-09-17 22:14 UTCEG score recompute
  62. 2026-09-17 22:14 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  63. 2026-09-17 04:58 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  64. 2026-09-16 16:13 UTCEG score recompute
  65. 2026-09-16 16:13 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  66. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  67. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  68. 2026-09-16 02:27 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  69. 2026-09-15 13:39 UTCEG score recompute
  70. 2026-09-15 13:39 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  71. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  72. 2026-09-15 00:54 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  73. 2026-09-14 12:09 UTCEG score recompute
  74. 2026-09-14 12:09 UTCGHSA enrichmentGHSA-3cfm-hj78-94wf · GitHub severity HIGH · GitHub CVSS 7.8
  75. 2026-09-13 23:24 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-72350?
CVE-2026-72350 is a high-severity vulnerability; its CVE record was published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_u32: reject invalid shift counts u32matchit() executes rule-supplied shift operands on a 32-bit value. A malformed u32 rule can provide a shift count of 32 or more, triggering an undefined shift out-of-bounds during…
When was the CVE record for CVE-2026-72350 published?
The CVE record for CVE-2026-72350 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 October 16, 2026; the record at its source may have been updated since.
Is CVE-2026-72350 actively exploited?
CVE-2026-72350 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72350?
CVE-2026-72350 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-2026-72350?
A fix for CVE-2026-72350 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72350 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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