Vulnerability-Lookup

FKIE_CVE-2026-43215

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-11 19:44

Severity ?

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifs_tcp_ses_lock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srv_lock, ses_lock and tc_lock to protect fields within the corresponding structs. This was done to provide a more granular protection and avoid unnecessary serialization. There were still a couple of uses of cifs_tcp_ses_lock to provide tcon fields. In this patch, I've replaced them with tc_lock.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3969db6b22e3d90d8c5f22ac1a7fe0350a94c136	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/601dd3b79769b38d30b693c40afdb2a4b7edf9d0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8c59eeeeffa1524ef57e173a89a1a3ff539888d5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/953953abb66e52c224057ab91e404284fefeab62	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/96c4af418586ee9a6aab61738644366426e05316	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix locking usage for tcon fields\n\nWe used to use the cifs_tcp_ses_lock to protect a lot of objects\nthat are not just the server, ses or tcon lists. We later introduced\nsrv_lock, ses_lock and tc_lock to protect fields within the\ncorresponding structs. This was done to provide a more granular\nprotection and avoid unnecessary serialization.\n\nThere were still a couple of uses of cifs_tcp_ses_lock to provide\ntcon fields. In this patch, I\u0027ve replaced them with tc_lock."
    }
  ],
  "id": "CVE-2026-43215",
  "lastModified": "2026-05-11T19:44:10.940",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "impactScore": 5.9,
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        "type": "Secondary"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-43215 (GCVE-0-2026-43215)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:20

Title

cifs: Fix locking usage for tcon fields

Summary

Severity ?

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/953953abb66e52c22…
https://git.kernel.org/stable/c/601dd3b79769b38d3…
https://git.kernel.org/stable/c/3969db6b22e3d90d8…
https://git.kernel.org/stable/c/8c59eeeeffa1524ef…
https://git.kernel.org/stable/c/96c4af418586ee9a6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 , < 953953abb66e52c224057ab91e404284fefeab62 (git) Affected: d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 , < 601dd3b79769b38d30b693c40afdb2a4b7edf9d0 (git) Affected: d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 , < 3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 (git) Affected: d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 , < 8c59eeeeffa1524ef57e173a89a1a3ff539888d5 (git) Affected: d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 , < 96c4af418586ee9a6aab61738644366426e05316 (git)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43215

CVE-2026-43215 (GCVE-0-2026-43215)

Tags

Sightings

Nomenclature