CVE-2026-43074

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekElevated
7.8EG
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).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

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

eventpoll: defer struct eventpoll free to RCU grace period

In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurrent thread. Defer the kfree() to an RCU callback to prevent UAF.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100

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 (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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, Track* at medium and Attend at high mission impact.
Exploitation public PoC (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

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

Exploitation public PoC (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.

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

May 6, 2026

Last Modified

October 15, 2026

Advisory Details (5)

Auto-updated May 20, 2026
Patch available.
Web page

eventpoll: defer struct eventpoll free to RCU grace period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322
Web page

eventpoll: defer struct eventpoll free to RCU grace period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf
Web page

eventpoll: defer struct eventpoll free to RCU grace period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427
Web page

eventpoll: defer struct eventpoll free to RCU grace period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9
Web page

eventpoll: defer struct eventpoll free to RCU grace period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f

Patch Availability(31)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-10-15ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-10-15ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-10-15ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-10-15ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-10-15ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-10-15ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-10-15ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-10-15ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-10-15ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-10-15ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-10-15ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-10-15ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-10-15ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-10-15ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-10-15ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-10-15ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-10-15ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-10-15ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-10-15ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-10-15ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-10-15ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-10-15ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1106.104) @ jammy2026-10-15ubuntu
redhatkernel-0:6.12.0-259.26.el10nv2026-09-29redhat
redhatkernel-0:6.12.0-55.88.1.el10_02026-07-14redhat
redhatkernel-0:5.14.0-570.127.1.el9_62026-07-13redhat
redhatkernel-0:5.14.0-427.137.1.el9_42026-07-10redhat
redhatkernel-0:5.14.0-687.23.1.el9_82026-07-08redhat
redhatkernel-0:6.12.0-211.31.1.el10_22026-07-08redhat
redhatkernel-0:6.12.0-231.15.el10nv2026-07-07redhat
linuxKernel @ 6.6.136 (fixes >=6.4.0)—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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)
  • every version up to 6.12.85-1: fixed in 6.12.85-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (130 versions)
  • every version up to 6.19.14-1: fixed in 6.19.14-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(18)

Data Freshness Timeline

(refreshed 16× in last 7d / 32× 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 252 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 152 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 02:34 UTCVendor advisory
  2. 2026-10-15 02:33 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  3. 2026-10-15 01:37 UTCEG score recompute
  4. 2026-10-15 01:37 UTCVendor advisory
  5. 2026-10-15 01:36 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  8. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-12 16:06 UTCEG score recompute
  10. 2026-10-11 19:48 UTCEG score recompute
  11. 2026-10-11 17:03 UTCEG score recompute
  12. 2026-10-11 14:28 UTCEG score recompute
  13. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-09-30 10:11 UTCOSV refresh
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
Show 75 more
  1. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  7. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-09-11 16:53 UTCOSV refresh
  11. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  13. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  16. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  22. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  26. 2026-08-23 20:28 UTCEG score recompute
  27. 2026-08-23 20:28 UTCVendor advisory
  28. 2026-08-23 20:27 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  29. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  30. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  31. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  32. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  33. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  34. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  35. 2026-08-17 13:00 UTCEG score recompute
  36. 2026-08-17 13:00 UTCVendor advisory
  37. 2026-08-17 13:00 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  38. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  39. 2026-08-16 04:56 UTCEG score recompute
  40. 2026-08-16 04:56 UTCVendor advisory
  41. 2026-08-16 04:56 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  42. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  43. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  44. 2026-08-14 15:01 UTCVendor advisory
  45. 2026-08-14 15:01 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  46. 2026-08-14 03:31 UTCEG score recompute
  47. 2026-08-14 03:31 UTCVendor advisory
  48. 2026-08-14 03:31 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  49. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  50. 2026-08-13 04:40 UTCVendor advisory
  51. 2026-08-13 04:40 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  52. 2026-08-12 17:10 UTCEG score recompute
  53. 2026-08-12 17:10 UTCVendor advisory
  54. 2026-08-12 17:10 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  55. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  56. 2026-08-11 16:01 UTCEG score recompute
  57. 2026-08-11 16:01 UTCVendor advisory
  58. 2026-08-11 16:01 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  59. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  60. 2026-08-11 01:34 UTCEG score recompute
  61. 2026-08-11 01:34 UTCVendor advisory
  62. 2026-08-11 01:34 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  63. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  64. 2026-08-10 13:09 UTCVendor advisory
  65. 2026-08-10 13:09 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  66. 2026-08-10 01:39 UTCVendor advisory
  67. 2026-08-10 01:39 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  68. 2026-08-09 14:09 UTCEG score recompute
  69. 2026-08-09 14:09 UTCVendor advisory
  70. 2026-08-09 14:08 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  71. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  72. 2026-08-09 02:38 UTCVendor advisory
  73. 2026-08-09 02:38 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8
  74. 2026-08-08 12:27 UTCVendor advisory
  75. 2026-08-08 12:27 UTCGHSA enrichmentGHSA-4j6h-qqh4-vpw7 · GitHub severity HIGH · GitHub CVSS 7.8

Publicly available exploits

(1 reference)

Public exploit code is referenced for this CVE (1 GitHub PoC). Defenders should treat patch urgency accordingly.

  • GitHub PoCPeronGH/badepoll-selinux-disabler
    Published Jul 18, 2026

    Use CVE-2026-43074 to disable SELinux on Android (Linux 6.6/6.12)

    Open source ↗

Frequently asked(5)

What is CVE-2026-43074?
CVE-2026-43074 is a high-severity vulnerability; its CVE record was published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurrent thread. Defer the kfree() to an RCU…
When was the CVE record for CVE-2026-43074 published?
The CVE record for CVE-2026-43074 was published on May 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 15, 2026; the record at its source may have been updated since.
Is CVE-2026-43074 actively exploited?
CVE-2026-43074 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-2026-43074?
CVE-2026-43074 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43074?
A fix for CVE-2026-43074 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43074 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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