CVE-2026-43452

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-05-08. NVD baseline CVSS 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

A fix is available — apply it.

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

netfilter: x_tables: guard option walkers against 1-byte tail reads

When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end of the option area.

Add an explicit i == optlen - 1 check before dereferencing op[i + 1] in xt_tcpudp and xt_dccp option walkers.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
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

netfilter: x_tables: guard option walkers against 1-byte tail reads - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36
generic

netfilter: x_tables: guard option walkers against 1-byte tail reads - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4
generic

netfilter: x_tables: guard option walkers against 1-byte tail reads - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907
generic

netfilter: x_tables: guard option walkers against 1-byte tail reads - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a
generic

netfilter: x_tables: guard option walkers against 1-byte tail reads - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5
generic

netfilter: x_tables: guard option walkers against 1-byte tail reads - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823
generic

netfilter: x_tables: guard option walkers against 1-byte tail reads - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540
generic

netfilter: x_tables: guard option walkers against 1-byte tail reads - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c

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-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ 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-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 @ 5.10.253—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)6.19.10-1—

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 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 227 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 14:53 UTCEPSS rescore
  4. 2026-09-11 14:23 UTCOSV refresh
  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 19:01 UTCEG score recompute
  20. 2026-08-23 19:01 UTCVendor advisory
  21. 2026-08-23 19:01 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 17:04 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 11:31 UTCEG score recompute
  4. 2026-08-17 11:31 UTCVendor advisory
  5. 2026-08-17 11:31 UTCGHSA enrichment
  6. 2026-08-16 14:56 UTCEPSS rescore
  7. 2026-08-16 04:34 UTCEG score recompute
  8. 2026-08-16 04:34 UTCVendor advisory
  9. 2026-08-16 04:34 UTCGHSA enrichment
  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-15 01:34 UTCEG score recompute
  12. 2026-08-15 01:34 UTCVendor advisory
  13. 2026-08-15 01:34 UTCGHSA enrichment
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-14 14:21 UTCVendor advisory
  16. 2026-08-14 14:21 UTCGHSA enrichment
  17. 2026-08-14 03:08 UTCEG score recompute
  18. 2026-08-14 03:08 UTCVendor advisory
  19. 2026-08-14 03:08 UTCGHSA enrichment
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 03:56 UTCVendor advisory
  22. 2026-08-13 03:56 UTCGHSA enrichment
  23. 2026-08-12 16:44 UTCEG score recompute
  24. 2026-08-12 16:44 UTCVendor advisory
  25. 2026-08-12 16:43 UTCGHSA enrichment
  26. 2026-08-12 13:51 UTCEPSS rescore
  27. 2026-08-11 15:51 UTCEG score recompute
  28. 2026-08-11 15:51 UTCVendor advisory
  29. 2026-08-11 15:51 UTCGHSA enrichment
  30. 2026-08-11 13:43 UTCEPSS rescore
  31. 2026-08-11 01:17 UTCEG score recompute
  32. 2026-08-11 01:17 UTCVendor advisory
  33. 2026-08-11 01:17 UTCGHSA enrichment
  34. 2026-08-11 00:00 UTCEPSS rescore
  35. 2026-08-10 12:09 UTCVendor advisory
  36. 2026-08-10 12:09 UTCGHSA enrichment
  37. 2026-08-10 00:49 UTCEG score recompute
  38. 2026-08-10 00:49 UTCVendor advisory
  39. 2026-08-10 00:49 UTCGHSA enrichment
  40. 2026-08-09 13:46 UTCEPSS rescore
  41. 2026-08-09 13:36 UTCVendor advisory
  42. 2026-08-09 13:36 UTCGHSA enrichment
  43. 2026-08-09 02:23 UTCEG score recompute
  44. 2026-08-09 02:23 UTCVendor advisory
  45. 2026-08-09 02:23 UTCGHSA enrichment
  46. 2026-08-08 16:37 UTCEPSS rescore
  47. 2026-08-08 11:22 UTCVendor advisory
  48. 2026-08-08 11:22 UTCGHSA enrichment
  49. 2026-08-08 00:09 UTCEG score recompute
  50. 2026-08-08 00:09 UTCVendor advisory
  51. 2026-08-08 00:09 UTCGHSA enrichment
  52. 2026-08-07 12:55 UTCVendor advisory
  53. 2026-08-07 12:55 UTCGHSA enrichment
  54. 2026-08-07 01:43 UTCEG score recompute
  55. 2026-08-07 01:43 UTCVendor advisory
  56. 2026-08-07 01:43 UTCGHSA enrichment
  57. 2026-08-06 13:46 UTCEPSS rescore
  58. 2026-08-06 12:11 UTCVendor advisory
  59. 2026-08-06 12:11 UTCGHSA enrichment
  60. 2026-08-06 00:57 UTCEG score recompute
  61. 2026-08-06 00:57 UTCVendor advisory
  62. 2026-08-06 00:57 UTCGHSA enrichment
  63. 2026-08-05 19:17 UTCEPSS rescore
  64. 2026-08-05 13:44 UTCEG score recompute
  65. 2026-08-05 13:44 UTCVendor advisory
  66. 2026-08-05 13:44 UTCGHSA enrichment
  67. 2026-08-04 15:10 UTCEPSS rescore
  68. 2026-08-04 10:38 UTCEPSS rescore
  69. 2026-08-03 19:30 UTCEG score recompute
  70. 2026-08-03 19:30 UTCVendor advisory
  71. 2026-08-03 19:30 UTCGHSA enrichment
  72. 2026-08-03 10:36 UTCEPSS rescore
  73. 2026-08-03 01:07 UTCVendor advisory
  74. 2026-08-03 01:07 UTCGHSA enrichment
  75. 2026-08-02 13:54 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-43452?
CVE-2026-43452 is a high vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: guard option walkers against 1-byte tail reads When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end of the option area.…
When was CVE-2026-43452 disclosed?
CVE-2026-43452 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-2026-43452 actively exploited?
CVE-2026-43452 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 62.5% of all scored CVEs.
What is the CVSS score of CVE-2026-43452?
CVE-2026-43452 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-43452?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43452, 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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