CVE-2026-43112

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath

When cifs_sanitize_prepath is called with an empty string or a string containing only delimiters (e.g., "/"), the current logic attempts to check *(cursor2 - 1) before cursor2 has advanced. This results in an out-of-bounds read.

This patch adds an early exit check after stripping prepended delimiters. If no path content remains, the function returns NULL.

The bug was identified via manual audit and verified using a standalone test case compiled with AddressSanitizer, which triggered a SEGV on affected inputs.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

May 6, 2026

Last Modified

September 18, 2026

Advisory Details (5)

Auto-updated May 8, 2026
No patch confirmed yet.
generic

fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/86f9c23e0814cfdffda9eedf0c591c51ba209010
generic

fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/78ec5bf2f589ec7fd8f169394bfeca541b077317
generic

fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d4fe469fe7dbff7d874c196bb680a82f2625d95
generic

fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3
generic

fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439

Vendor Advisories for CVE-2026-43112(20)

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

Patch Availability(25)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-18ubuntu
redhatrhcos-418.94.202609031320-02026-09-17redhat
redhatrhcos-413.92.202609080414-02026-09-17redhat
redhatrhcos-414.92.202609011250-02026-09-14redhat
redhatrhcos-416.94.202609011112-02026-09-10redhat
redhatrhcos-412.86.202608241157-02026-09-03redhat
redhatrhcos-417.94.202608250221-02026-09-03redhat
redhatkpatch-patch2026-09-02redhat
redhatrhcos-4.19.9.6.202608182320-02026-08-26redhat
redhatkernel-rt-0:5.14.0-284.188.1.rt14.473.el9_22026-08-26redhat
redhatkernel-0:5.14.0-284.188.1.el9_22026-08-26redhat
redhatrhcos-4.20.9.6.202608181658-02026-08-25redhat
redhatrhcos-4.21.9.6.202608180431-02026-08-25redhat
redhatkernel-0:5.14.0-427.145.1.el9_42026-08-19redhat
redhatkernel-0:4.18.0-372.206.1.el8_62026-08-12redhat
redhatkernel-0:5.14.0-570.134.1.el9_62026-08-12redhat
redhatkernel-0:6.12.0-55.95.1.el10_02026-08-10redhat
redhatkernel-0:4.18.0-477.158.1.el8_82026-08-10redhat
redhatrhcos-4.22.9.8.202607152026-02026-07-21redhat
redhatkernel-rt-0:4.18.0-553.141.1.rt7.482.el8_102026-07-07redhat
redhatkernel-0:4.18.0-553.141.1.el8_102026-07-07redhat
redhatkernel-0:5.14.0-687.22.1.el9_82026-07-06redhat
redhatkernel-0:6.12.0-211.30.1.el10_22026-07-02redhat
linuxKernel @ 5.15.209—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
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 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (129 versions)6.19.14-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(7)

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 24× in last 7d / 93× 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 298 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43112?
CVE-2026-43112 is a high vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: fs/smb/client: fix out-of-bounds read in cifssanitizeprepath When cifssanitizeprepath is called with an empty string or a string containing only delimiters (e.g., "/"), the current logic attempts to check *(cursor2 - 1) before…
When was CVE-2026-43112 disclosed?
CVE-2026-43112 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43112 actively exploited?
CVE-2026-43112 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 71.1% of all scored CVEs.
What is the CVSS score of CVE-2026-43112?
CVE-2026-43112 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-43112?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43112, 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-2026-43112

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