CVE-2026-52998

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check

The nf_osf_ttl() function accessed skb->dev to perform a local interface address lookup without verifying that the device pointer was valid.

Additionally, the implementation utilized an in_dev_for_each_ifa_rcu loop to match the packet source address against local interface addresses. It assumed that packets from the same subnet should not see a decrement on the initial TTL. A packet might appear it is from the same subnet but it actually isn't especially in modern environments with containers and virtual switching.

Remove the device dereference and interface loop. Replace the logic with a switch statement that evaluates the TTL according to the ttl_check.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

June 24, 2026

Last Modified

September 8, 2026

Advisory Details (8)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f4de0777e4554a7de19c920accde6319dd530782
generic

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/edc806f9122961f0d3819f7c69c14cccde31f277
generic

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c996a90f3071cf43683e5423da31aadbe002b8b4
generic

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/95be653a76793856ff8b2d8bd82c2943c23f5ca8
generic

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/83fc5dd63455a779ea2dd0f7ffee3c920919d80b
generic

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/79b90a96688e521771fa6ed3dc7864b76b8df293
generic

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/711987ba281fd806322a7cd244e98e2a81903114
generic

netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d05de2f0928d81309a815ecc76d1a3ad72cbc16

Vendor Advisories for CVE-2026-52998(2)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-09-08ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-09-08ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-09-08ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-09-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-09-08ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-08ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-09-08ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-09-08ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-09-08ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-08ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-08ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-09-08ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-09-08ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-09-08ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-09-08ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-09-08ubuntu

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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

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 11× in last 7d / 88× 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 277 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-52998?
CVE-2026-52998 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check The nfosfttl() function accessed skb->dev to perform a local interface address lookup without verifying that the device pointer was valid. Additionally, the…
When was CVE-2026-52998 disclosed?
CVE-2026-52998 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52998 actively exploited?
CVE-2026-52998 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.0% of all scored CVEs.
What is the CVSS score of CVE-2026-52998?
CVE-2026-52998 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-52998?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52998, 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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