CVE-2026-23236

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-03-04. 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

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:

fbdev: smscufx: properly copy ioctl memory to kernelspace

The UFX_IOCTL_REPORT_DAMAGE ioctl does not properly copy data from userspace to kernelspace, and instead directly references the memory, which can cause problems if invalid data is passed from userspace. Fix this all up by correctly copying the memory before accessing it within the kernel.

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
11%
KEV
Not listed

Published

March 4, 2026

Last Modified

August 5, 2026

Advisory Details (9)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

SSA-253495

https://cert-portal.siemens.com/productcert/html/ssa-253495.html
generic

fbdev: smscufx: properly copy ioctl memory to kernelspace - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f1e91bd4efeae48b0f42caed7e8ce2e3a0d05b02
generic

fbdev: smscufx: properly copy ioctl memory to kernelspace - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a0321e6e58facb39fe191caa0e52ed9aab6a48fe
generic

fbdev: smscufx: properly copy ioctl memory to kernelspace - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6167af934f956d3ae1e06d61f45cd0d1004bbe1a
generic

fbdev: smscufx: properly copy ioctl memory to kernelspace - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/52917e265aa5f848212f60fc50fc504d8ef12866
generic

fbdev: smscufx: properly copy ioctl memory to kernelspace - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1c008ad0f0d1c1523902b9cdb08e404129677bfc
generic

fbdev: smscufx: properly copy ioctl memory to kernelspace - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/120adae7b42faa641179270c067864544a50ab69
generic

fbdev: smscufx: properly copy ioctl memory to kernelspace - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0634e8d650993602fc5b389ff7ac525f6542e141
generic

fbdev: smscufx: properly copy ioctl memory to kernelspace - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/061cfeb560aa3ddc174153dbe5be9d0b55eb7248

Vendor Advisories for CVE-2026-23236(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.251—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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (49 versions)5.10.251-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.162-1~deb11u1 (15 versions)6.1.164-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (47 versions)6.1.164-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.74-2~bpo12+1 (15 versions)6.12.74-2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.18~rc7-1~exp1 (99 versions)6.18.13-1—

Additional Vendor Advisories

(23)

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

Frequently asked(5)

What is CVE-2026-23236?
CVE-2026-23236 is a medium vulnerability published on March 4, 2026. In the Linux kernel, the following vulnerability has been resolved: fbdev: smscufx: properly copy ioctl memory to kernelspace The UFXIOCTLREPORT_DAMAGE ioctl does not properly copy data from userspace to kernelspace, and instead directly references the memory, which can cause problems if invalid…
When was CVE-2026-23236 disclosed?
CVE-2026-23236 was first published in the National Vulnerability Database on March 4, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23236 actively exploited?
CVE-2026-23236 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 89.4% of all scored CVEs.
What is the CVSS score of CVE-2026-23236?
CVE-2026-23236 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-23236?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23236, 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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