Riskcovery

CVE-2024-42244

USB: serial: mos7840: fix crash on resume

State
Published
Severity
Not scored
Published
Aug 7, 2024
Updated
May 11, 2026
Reserved
Jul 30, 2024

Read the record on cve.org

Description

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

USB: serial: mos7840: fix crash on resume

Since commit c49cfa917025 ("USB: serial: use generic method if no alternative is provided in usb serial layer"), USB serial core calls the generic resume implementation when the driver has not provided one.

This can trigger a crash on resume with mos7840 since support for multiple read URBs was added back in 2011. Specifically, both port read URBs are now submitted on resume for open ports, but the context pointer of the second URB is left set to the core rather than mos7840 port structure.

Fix this by implementing dedicated suspend and resume functions for mos7840.

Tested with Delock 87414 USB 2.0 to 4x serial adapter.

[ johan: analyse crash and rewrite commit message; set busy flag on resume; drop bulk-in check; drop unnecessary usb_kill_urb() ]

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • d83b405383c965498923f3561c3321e2b5df5727 to before 932a86a711c722b45ed47ba2103adca34d225b33Affected
  • d83b405383c965498923f3561c3321e2b5df5727 to before b14aa5673e0a8077ff4b74f0bb260735e7d5e6a4Affected
  • d83b405383c965498923f3561c3321e2b5df5727 to before 1094ed500987e67a9d18b0f95e1812f1cc720856Affected
  • d83b405383c965498923f3561c3321e2b5df5727 to before 5ae6a64f18211851c8df6b4221381c438b9a7348Affected
  • d83b405383c965498923f3561c3321e2b5df5727 to before 553e67dec846323b5575e78a776cf594c13f98c4Affected
  • d83b405383c965498923f3561c3321e2b5df5727 to before c15a688e49987385baa8804bf65d570e362f8576Affected
LinuxLinux
  • 3.3Affected
  • before 3.3Not affected
  • 5.10.222 through 5.10.*Not affected
  • 5.15.163 through 5.15.*Not affected
  • 6.1.100 through 6.1.*Not affected
  • 6.6.41 through 6.6.*Not affected
  • 6.9.10 through 6.9.*Not affected
  • 6.10 and laterNot affected

References

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