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

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-08 12:41
VLAI?
Title
cifs: Fix locking usage for tcon fields
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.
Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Assigner
References
Impacted 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)
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    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)
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



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