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
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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)
EPSS
37.1%
KEV
Not listed

Published

May 6, 2026

Last Modified

May 11, 2026

Advisory Details (3)

Auto-updated May 9, 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/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(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 33× 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 228 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 May 11, 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 37.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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.

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