CVE-2026-43339

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-08. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

ipv6: prevent possible UaF in addrconf_permanent_addr()

The mentioned helper try to warn the user about an exceptional condition, but the message is delivered too late, accessing the ipv6 after its possible deletion.

Reorder the statement to avoid the possible UaF; while at it, place the warning outside the idev->lock as it needs no protection.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

May 8, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated May 11, 2026
No patch confirmed yet.
generic

ipv6: prevent possible UaF in addrconf_permanent_addr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fd63f185979b047fb22a0dfc6bd94d0cab6a6a70
generic

ipv6: prevent possible UaF in addrconf_permanent_addr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eec49a33611f20336b357b3953df44f1a02049e8
generic

ipv6: prevent possible UaF in addrconf_permanent_addr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bacc7f31085c9820922f00bc7d79756ffa13123a
generic

ipv6: prevent possible UaF in addrconf_permanent_addr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e
generic

ipv6: prevent possible UaF in addrconf_permanent_addr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7bfafa1b0cd582983ebec6bb20f0a435528fe567
generic

ipv6: prevent possible UaF in addrconf_permanent_addr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3cd4efb5df72843dfac892d0b3c7a4a8bd926b65
generic

ipv6: prevent possible UaF in addrconf_permanent_addr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1
generic

ipv6: prevent possible UaF in addrconf_permanent_addr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/25357b670afb5b517096da783abaa5cc4bf8359e

Vendor Advisories for CVE-2026-43339(1)

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

Patch Availability(27)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-23ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-23ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-23ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.186.196~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-23ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-23ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-23ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1107.113~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-23ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-23ubuntu
linuxKernel @ 5.10.253—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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (53 versions)5.10.257-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (122 versions)6.19.12-1—

Weakness Classification(1)

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

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 4× in last 7d / 70× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 204 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43339?
CVE-2026-43339 is a high vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent possible UaF in addrconfpermanentaddr() The mentioned helper try to warn the user about an exceptional condition, but the message is delivered too late, accessing the ipv6 after its possible deletion. Reorder the…
When was CVE-2026-43339 disclosed?
CVE-2026-43339 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43339 actively exploited?
CVE-2026-43339 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.9% of all scored CVEs.
What is the CVSS score of CVE-2026-43339?
CVE-2026-43339 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43339?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43339, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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