CVE-2026-43427 (GCVE-0-2026-43427)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-11 22:24
VLAI
Title
usb: class: cdc-wdm: fix reordering issue in read code path
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: class: cdc-wdm: fix reordering issue in read code path Quoting the bug report: Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdm_read() can see the new length and call copy_to_user() on uninitialized memory. This also violates LKMM data race rules [1]. Fix it by using WRITE_ONCE and memory barriers.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 638328ca9c17ae6511ad62198c57bae32ffa3c91 (git)
Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 170e8daca24da6edb4be82ab01abf44e87af387b (git)
Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < c8fa96ed021923dae147bcd9f9205b8df7b82360 (git)
Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 4ee3062bf2c9a722afef429826e8607eaf3fc6a0 (git)
Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 276aef0fd2b92f41b920ac891c72cadeee957934 (git)
Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 67ed312124bb1b61858778ac0b985b48961c862a (git)
Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < e3c874b05901dc519054b5107d16620e6d2b5fea (git)
Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 8df672bfe3ec2268c2636584202755898e547173 (git)
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Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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Taxonomy of the tags.





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

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.