CVE-2026-43123

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-06. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

fbcon: check return value of con2fb_acquire_newinfo()

If fbcon_open() fails when called from con2fb_acquire_newinfo() then info->fbcon_par pointer remains NULL which is later dereferenced.

Add check for return value of the function con2fb_acquire_newinfo() to avoid it.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

May 6, 2026

Last Modified

May 12, 2026

Advisory Details (7)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

fbcon: check return value of con2fb_acquire_newinfo() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f57b61624c86ef8f87f6e6b7dd0755de03d90e89
generic

fbcon: check return value of con2fb_acquire_newinfo() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d3e535533767c85788529e626478718b7e95a59f
generic

fbcon: check return value of con2fb_acquire_newinfo() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a785c4e2a999c2d51dfcf40d317cfb30cc735d2c
generic

fbcon: check return value of con2fb_acquire_newinfo() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3b5a754ec86bc6064af9aca76eb191c2405e6b0c
generic

fbcon: check return value of con2fb_acquire_newinfo() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/11a93180a70bb3095a9bd80d113d9277e30d9959
generic

fbcon: check return value of con2fb_acquire_newinfo() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc
generic

fbcon: check return value of con2fb_acquire_newinfo() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/011a0502801c8536f64141a2b61362c14f456544

Patch Availability(25)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1055.56~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-08-23ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-23ubuntu
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-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-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-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 @ 5.15.203—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 ... 7.2~rc5-1~exp1 (496 versions)——
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 (116 versions)6.19.6-1—

Weakness Classification(1)

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

All Vendor Advisories

(24)

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 190 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 16:23 UTCOSV refresh
  4. 2026-09-11 14:53 UTCEPSS rescore
  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 20:17 UTCEG score recompute
  20. 2026-08-23 20:17 UTCVendor advisory
  21. 2026-08-23 20:17 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 17:03 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 12:58 UTCEG score recompute
  4. 2026-08-17 12:58 UTCVendor advisory
  5. 2026-08-17 12:58 UTCGHSA enrichment
  6. 2026-08-16 14:56 UTCEPSS rescore
  7. 2026-08-16 04:55 UTCEG score recompute
  8. 2026-08-16 04:55 UTCVendor advisory
  9. 2026-08-16 04:55 UTCGHSA enrichment
  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-15 01:42 UTCEG score recompute
  12. 2026-08-15 01:42 UTCVendor advisory
  13. 2026-08-15 01:42 UTCGHSA enrichment
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-14 03:29 UTCEG score recompute
  16. 2026-08-14 03:29 UTCVendor advisory
  17. 2026-08-14 03:29 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-12 21:58 UTCEG score recompute
  20. 2026-08-12 21:58 UTCVendor advisory
  21. 2026-08-12 21:58 UTCGHSA enrichment
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-11 23:46 UTCEG score recompute
  24. 2026-08-11 23:46 UTCVendor advisory
  25. 2026-08-11 23:46 UTCGHSA enrichment
  26. 2026-08-11 13:43 UTCEPSS rescore
  27. 2026-08-11 01:33 UTCEG score recompute
  28. 2026-08-11 01:33 UTCVendor advisory
  29. 2026-08-11 01:33 UTCGHSA enrichment
  30. 2026-08-11 00:00 UTCEPSS rescore
  31. 2026-08-10 00:49 UTCEG score recompute
  32. 2026-08-10 00:49 UTCVendor advisory
  33. 2026-08-10 00:49 UTCGHSA enrichment
  34. 2026-08-09 13:46 UTCEPSS rescore
  35. 2026-08-09 02:37 UTCEG score recompute
  36. 2026-08-09 02:37 UTCVendor advisory
  37. 2026-08-09 02:37 UTCGHSA enrichment
  38. 2026-08-08 16:37 UTCEPSS rescore
  39. 2026-08-07 18:51 UTCEG score recompute
  40. 2026-08-07 18:51 UTCVendor advisory
  41. 2026-08-07 18:51 UTCGHSA enrichment
  42. 2026-08-06 20:35 UTCEG score recompute
  43. 2026-08-06 20:35 UTCVendor advisory
  44. 2026-08-06 20:35 UTCGHSA enrichment
  45. 2026-08-06 13:46 UTCEPSS rescore
  46. 2026-08-05 22:22 UTCEG score recompute
  47. 2026-08-05 22:22 UTCVendor advisory
  48. 2026-08-05 22:22 UTCGHSA enrichment
  49. 2026-08-05 19:17 UTCEPSS rescore
  50. 2026-08-04 15:10 UTCEPSS rescore
  51. 2026-08-04 10:38 UTCEPSS rescore
  52. 2026-08-04 02:12 UTCEG score recompute
  53. 2026-08-04 02:12 UTCVendor advisory
  54. 2026-08-04 02:12 UTCGHSA enrichment
  55. 2026-08-03 10:36 UTCEPSS rescore
  56. 2026-08-03 03:59 UTCVendor advisory
  57. 2026-08-03 03:59 UTCGHSA enrichment
  58. 2026-08-02 05:10 UTCEG score recompute
  59. 2026-08-02 05:10 UTCVendor advisory
  60. 2026-08-02 05:10 UTCGHSA enrichment
  61. 2026-08-02 02:27 UTCEPSS rescore
  62. 2026-08-01 04:16 UTCEPSS rescore
  63. 2026-07-30 16:28 UTCEPSS rescore
  64. 2026-07-30 01:30 UTCEPSS rescore
  65. 2026-07-28 15:36 UTCEPSS rescore
  66. 2026-07-27 14:13 UTCEPSS rescore
  67. 2026-07-26 14:54 UTCEPSS rescore
  68. 2026-07-26 14:54 UTCEPSS rescore
  69. 2026-07-25 14:18 UTCEPSS rescore
  70. 2026-07-24 14:17 UTCEPSS rescore
  71. 2026-07-23 14:18 UTCEPSS rescore
  72. 2026-07-23 03:13 UTCEG score recompute
  73. 2026-07-22 14:08 UTCEPSS rescore
  74. 2026-07-21 15:24 UTCEPSS rescore
  75. 2026-07-20 22:02 UTCOSV refresh

Frequently asked(5)

What is CVE-2026-43123?
CVE-2026-43123 is a medium vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: fbcon: check return value of con2fbacquirenewinfo() If fbconopen() fails when called from con2fbacquire_newinfo() then info->fbcon_par pointer remains NULL which is later dereferenced. Add check for return value of the function…
When was CVE-2026-43123 disclosed?
CVE-2026-43123 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43123 actively exploited?
CVE-2026-43123 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 97.2% of all scored CVEs.
What is the CVSS score of CVE-2026-43123?
CVE-2026-43123 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43123?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43123, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-43123

Explore →

Is Your Infrastructure Affected by CVE-2026-43123?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs