CVE-2026-43197

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-06. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

A fix is available — apply it.

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

netconsole: avoid OOB reads, msg is not nul-terminated

msg passed to netconsole from the console subsystem is not guaranteed to be nul-terminated. Before recent commit 7eab73b18630 ("netconsole: convert to NBCON console infrastructure") the message would be placed in printk_shared_pbufs, a static global buffer, so KASAN had harder time catching OOB accesses. Now we see:

printk: console [netcon_ext0] enabled BUG: KASAN: slab-out-of-bounds in string+0x1f7/0x240 Read of size 1 at addr ffff88813b6d4c00 by task pr/netcon_ext0/594

CPU: 65 UID: 0 PID: 594 Comm: pr/netcon_ext0 Not tainted 6.19.0-11754-g4246fd6547c9 Call Trace: kasan_report+0xe4/0x120 string+0x1f7/0x240 vsnprintf+0x655/0xba0 scnprintf+0xba/0x120 netconsole_write+0x3fe/0xa10 nbcon_emit_next_record+0x46e/0x860 nbcon_kthread_func+0x623/0x750

Allocated by task 1: nbcon_alloc+0x1ea/0x450 register_console+0x26b/0xe10 init_netconsole+0xbb0/0xda0

The buggy address belongs to the object at ffff88813b6d4000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes to the right of allocated 3072-byte region [ffff88813b6d4000, ffff88813b6d4c00)

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

May 6, 2026

Last Modified

August 9, 2026

Advisory Details (4)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

netconsole: avoid OOB reads, msg is not nul-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8fe132c4873f9eb1b86ddbf31216e9d961a0b8b9
generic

netconsole: avoid OOB reads, msg is not nul-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/82aec772fca2223bc5774bd9af486fd95766e578
generic

netconsole: avoid OOB reads, msg is not nul-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/74ab1456eaa3b2eb986138f9e1f4cb37e73b6f58
generic

netconsole: avoid OOB reads, msg is not nul-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3126a2f98beaec5a554a1fb31c46db1e8542665e

Vendor Advisories for CVE-2026-43197(2)

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

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-40.40) @ questing2026-08-23ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1028.28) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-08-23ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.17.0-1017.19) @ questing2026-08-23ubuntu
ubuntulinux-virtual-hwe-24.04 (6.17.0-40.40~24.04.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-6.17 (6.17.0-1021.21) @ questing2026-08-23ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1021.21~24.04.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-6.17 (6.17.0-1018.18~24.04.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1062.65~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-138.138~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1059.62~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1034.35) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1059.62) @ noble2026-08-23ubuntu
linuxKernel @ 6.18.16—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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc5-1~exp1 (160 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (113 versions)6.19.6-1—

Weakness Classification(1)

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

All Vendor Advisories

(13)

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 5× in last 7d / 125× 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 332 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 19:17 UTCEPSS rescore
  5. 2026-08-30 01:22 UTCEPSS rescore
  6. 2026-08-28 21:41 UTCEPSS rescore
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-23 20:02 UTCEG score recompute
  11. 2026-08-23 20:02 UTCVendor advisory
  12. 2026-08-23 20:02 UTCGHSA enrichment
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-20 22:55 UTCEPSS rescore
  16. 2026-08-19 17:04 UTCEPSS rescore
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-17 12:56 UTCEG score recompute
  20. 2026-08-17 12:56 UTCVendor advisory
  21. 2026-08-17 12:56 UTCGHSA enrichment
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 09:13 UTCVendor advisory
  24. 2026-08-16 09:13 UTCGHSA enrichment
  25. 2026-08-16 04:53 UTCEG score recompute
Show 75 more
  1. 2026-08-16 04:53 UTCVendor advisory
  2. 2026-08-16 04:53 UTCGHSA enrichment
  3. 2026-08-16 02:14 UTCEPSS rescore
  4. 2026-08-15 02:26 UTCEG score recompute
  5. 2026-08-15 02:26 UTCVendor advisory
  6. 2026-08-15 02:26 UTCGHSA enrichment
  7. 2026-08-15 01:30 UTCEPSS rescore
  8. 2026-08-14 22:36 UTCVendor advisory
  9. 2026-08-14 22:36 UTCGHSA enrichment
  10. 2026-08-14 18:46 UTCVendor advisory
  11. 2026-08-14 18:46 UTCGHSA enrichment
  12. 2026-08-14 14:57 UTCVendor advisory
  13. 2026-08-14 14:57 UTCGHSA enrichment
  14. 2026-08-14 11:07 UTCVendor advisory
  15. 2026-08-14 11:07 UTCGHSA enrichment
  16. 2026-08-14 07:17 UTCVendor advisory
  17. 2026-08-14 07:17 UTCGHSA enrichment
  18. 2026-08-14 03:28 UTCEG score recompute
  19. 2026-08-14 03:28 UTCVendor advisory
  20. 2026-08-14 03:28 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-13 08:20 UTCVendor advisory
  23. 2026-08-13 08:20 UTCGHSA enrichment
  24. 2026-08-13 04:30 UTCVendor advisory
  25. 2026-08-13 04:30 UTCGHSA enrichment
  26. 2026-08-13 00:40 UTCVendor advisory
  27. 2026-08-13 00:40 UTCGHSA enrichment
  28. 2026-08-12 20:50 UTCVendor advisory
  29. 2026-08-12 20:50 UTCGHSA enrichment
  30. 2026-08-12 17:01 UTCEG score recompute
  31. 2026-08-12 17:01 UTCVendor advisory
  32. 2026-08-12 17:01 UTCGHSA enrichment
  33. 2026-08-12 13:51 UTCEPSS rescore
  34. 2026-08-11 23:39 UTCVendor advisory
  35. 2026-08-11 23:39 UTCGHSA enrichment
  36. 2026-08-11 19:49 UTCVendor advisory
  37. 2026-08-11 19:49 UTCGHSA enrichment
  38. 2026-08-11 16:00 UTCEG score recompute
  39. 2026-08-11 16:00 UTCVendor advisory
  40. 2026-08-11 16:00 UTCGHSA enrichment
  41. 2026-08-11 13:43 UTCEPSS rescore
  42. 2026-08-11 09:12 UTCVendor advisory
  43. 2026-08-11 09:12 UTCGHSA enrichment
  44. 2026-08-11 05:21 UTCVendor advisory
  45. 2026-08-11 05:21 UTCGHSA enrichment
  46. 2026-08-11 01:32 UTCEG score recompute
  47. 2026-08-11 01:32 UTCVendor advisory
  48. 2026-08-11 01:32 UTCGHSA enrichment
  49. 2026-08-11 00:00 UTCEPSS rescore
  50. 2026-08-10 11:47 UTCVendor advisory
  51. 2026-08-10 11:46 UTCGHSA enrichment
  52. 2026-08-10 06:50 UTCVendor advisory
  53. 2026-08-10 06:50 UTCGHSA enrichment
  54. 2026-08-10 02:59 UTCVendor advisory
  55. 2026-08-10 02:59 UTCGHSA enrichment
  56. 2026-08-09 23:09 UTCVendor advisory
  57. 2026-08-09 23:09 UTCGHSA enrichment
  58. 2026-08-09 19:20 UTCVendor advisory
  59. 2026-08-09 19:20 UTCGHSA enrichment
  60. 2026-08-09 18:41 UTCVendor advisory
  61. 2026-08-09 18:41 UTCGHSA enrichment
  62. 2026-08-09 18:10 UTCVendor advisory
  63. 2026-08-09 18:10 UTCGHSA enrichment
  64. 2026-08-09 14:20 UTCEG score recompute
  65. 2026-08-09 14:20 UTCVendor advisory
  66. 2026-08-09 14:20 UTCGHSA enrichment
  67. 2026-08-09 13:46 UTCEPSS rescore
  68. 2026-08-09 10:30 UTCVendor advisory
  69. 2026-08-09 10:30 UTCGHSA enrichment
  70. 2026-08-09 06:25 UTCVendor advisory
  71. 2026-08-09 06:25 UTCGHSA enrichment
  72. 2026-08-09 02:36 UTCEG score recompute
  73. 2026-08-09 02:36 UTCVendor advisory
  74. 2026-08-09 02:36 UTCGHSA enrichment
  75. 2026-08-08 16:37 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-43197?
CVE-2026-43197 is a critical vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: netconsole: avoid OOB reads, msg is not nul-terminated msg passed to netconsole from the console subsystem is not guaranteed to be nul-terminated. Before recent commit 7eab73b18630 ("netconsole: convert to NBCON console…
When was CVE-2026-43197 disclosed?
CVE-2026-43197 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on August 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43197 actively exploited?
CVE-2026-43197 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 60.5% of all scored CVEs.
What is the CVSS score of CVE-2026-43197?
CVE-2026-43197 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-43197?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43197, 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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