CVE-2026-43139

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. NVD baseline CVSS 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

A fix is available — apply it.

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

xfrm6: fix uninitialized saddr in xfrm6_get_saddr()

xfrm6_get_saddr() does not check the return value of ipv6_dev_get_saddr(). When ipv6_dev_get_saddr() fails to find a suitable source address (returns -EADDRNOTAVAIL), saddr->in6 is left uninitialized, but xfrm6_get_saddr() still returns 0 (success).

This causes the caller xfrm_tmpl_resolve_one() to use the uninitialized address in xfrm_state_find(), triggering KMSAN warning:

===================================================== BUG: KMSAN: uninit-value in xfrm_state_find+0x2424/0xa940 xfrm_state_find+0x2424/0xa940 xfrm_resolve_and_create_bundle+0x906/0x5a20 xfrm_lookup_with_ifid+0xcc0/0x3770 xfrm_lookup_route+0x63/0x2b0 ip_route_output_flow+0x1ce/0x270 udp_sendmsg+0x2ce1/0x3400 inet_sendmsg+0x1ef/0x2a0 __sock_sendmsg+0x278/0x3d0 __sys_sendto+0x593/0x720 __x64_sys_sendto+0x130/0x200 x64_sys_call+0x332b/0x3e70 do_syscall_64+0xd3/0xf80 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable tmp.i.i created at: xfrm_resolve_and_create_bundle+0x3e3/0x5a20 xfrm_lookup_with_ifid+0xcc0/0x3770 =====================================================

Fix by checking the return value of ipv6_dev_get_saddr() and propagating the error.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity86% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

May 6, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated May 13, 2026
No patch confirmed yet.
generic

xfrm6: fix uninitialized saddr in xfrm6_get_saddr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eb2ee15290af14c60b45cf2b73f5687d1d077d9b
generic

xfrm6: fix uninitialized saddr in xfrm6_get_saddr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dc0abce055134cb83b0d981d31ceb20dda419787
generic

xfrm6: fix uninitialized saddr in xfrm6_get_saddr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c7221e7bd8fc2ef38a0b27be580d9d202281306b
generic

xfrm6: fix uninitialized saddr in xfrm6_get_saddr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/719918fc88df6da023dfff370cd965151a5afd7f
generic

xfrm6: fix uninitialized saddr in xfrm6_get_saddr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6535867673bf301d52aa00593a4d1d18cc3922fa
generic

xfrm6: fix uninitialized saddr in xfrm6_get_saddr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4f28141786e1fe884ce42a5197ba9beed540f0ea
generic

xfrm6: fix uninitialized saddr in xfrm6_get_saddr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3dcd1664ac15eee6a690daec7c4ffc59190406f7
generic

xfrm6: fix uninitialized saddr in xfrm6_get_saddr() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1799d8abeabc68ec05679292aaf6cba93b343c05

Patch Availability(25)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-08-23ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-08-23ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.186.196~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-23ubuntu
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-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-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-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-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-23ubuntu
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
linuxKernel @ 5.10.252—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 (116 versions)6.19.6-1—

Weakness Classification(1)

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

All Vendor Advisories

(24)

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 7× in last 7d / 31× 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 209 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43139?
CVE-2026-43139 is a high vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: xfrm6: fix uninitialized saddr in xfrm6getsaddr() xfrm6getsaddr() does not check the return value of ipv6devgetsaddr(). When ipv6devgetsaddr() fails to find a suitable source address (returns -EADDRNOTAVAIL), saddr->in6 is left…
When was CVE-2026-43139 disclosed?
CVE-2026-43139 was first published in the National Vulnerability Database on May 6, 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-2026-43139 actively exploited?
CVE-2026-43139 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 69.1% of all scored CVEs.
What is the CVSS score of CVE-2026-43139?
CVE-2026-43139 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-43139?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43139, 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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