CVE-2026-52915

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

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

netfilter: ip6t_hbh: reject oversized option lists

struct ip6t_opts stores at most IP6T_OPTS_OPTSNR option descriptors, but hbh_mt6_check() does not reject larger optsnr values supplied from userspace.

Validate optsnr in the rule setup path so only match data that fits the fixed-size opts array can be installed. This follows the existing xtables pattern of rejecting invalid user-provided counts in checkentry() and keeps the packet matching path unchanged.

struct ip6t_opts has a fixed opts[IP6T_OPTS_OPTSNR] array, where IP6T_OPTS_OPTSNR is 16, then off-by-one array access is possible:

[ 137.924693][ T8692] UBSAN: array-index-out-of-bounds in ../net/ipv6/netfilter/ip6t_hbh.c:110:29 [ 137.926167][ T8692] index 16 is out of range for type '__u16 [16]'

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 8, 2026

Advisory Details (8)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

netfilter: ip6t_hbh: reject oversized option lists - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/db0250470f023f159094052c0bd5ab026a88ae93
generic

netfilter: ip6t_hbh: reject oversized option lists - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/784aadea7a108c9f90985683caa87fb0198c6a39
generic

netfilter: ip6t_hbh: reject oversized option lists - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6feb43c0995ab3a9c826707eb46541a1696fe4f7
generic

netfilter: ip6t_hbh: reject oversized option lists - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/588933f1a2ca5ff99274f8c9f25dc3a25d0191c3
generic

netfilter: ip6t_hbh: reject oversized option lists - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/57b0ac5e1b46f1f0338dff392ef2092e2871b412
generic

netfilter: ip6t_hbh: reject oversized option lists - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4322dcde6b4173c2d8e8e6118ed290794263bcc8
generic

netfilter: ip6t_hbh: reject oversized option lists - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/41ec2e242f1702e8370ddfe14d22b7a766021c3e
generic

netfilter: ip6t_hbh: reject oversized option lists - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2d523ba48d4ecc46acfb6aba548292cfcce1ac02

Vendor Advisories for CVE-2026-52915(2)

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

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-07-28ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-07-28ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-07-28ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-07-28ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-07-28ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-07-28ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-07-28ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-07-28ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-07-28ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-07-28ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-07-28ubuntu

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(11)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 17× in last 7d / 112× 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 121 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-52915?
CVE-2026-52915 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_hbh: reject oversized option lists struct ip6topts stores at most IP6TOPTS_OPTSNR option descriptors, but hbhmt6check() does not reject larger optsnr values supplied from userspace. Validate optsnr in the rule setup…
When was CVE-2026-52915 disclosed?
CVE-2026-52915 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52915 actively exploited?
CVE-2026-52915 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 97.4% of all scored CVEs.
What is the CVSS score of CVE-2026-52915?
CVE-2026-52915 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-52915?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52915, 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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