Riskcovery

CVE-2024-50058

serial: protect uart_port_dtr_rts() in uart_shutdown() too

State
Published
Severity
Not scored
Published
Oct 21, 2024
Updated
Oct 15, 2026
Reserved
Oct 21, 2024

Read the record on cve.org

Description

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

serial: protect uart_port_dtr_rts() in uart_shutdown() too

Commit af224ca2df29 (serial: core: Prevent unsafe uart port access, part 3) added few uport == NULL checks. It added one to uart_shutdown(), so the commit assumes, uport can be NULL in there. But right after that protection, there is an unprotected "uart_port_dtr_rts(uport, false);" call. That is invoked only if HUPCL is set, so I assume that is the reason why we do not see lots of these reports.

Or it cannot be NULL at this point at all for some reason :P.

Until the above is investigated, stay on the safe side and move this dereference to the if too.

I got this inconsistency from Coverity under CID 1585130. Thanks.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • af224ca2df297440448b9d407d21b50982c6d532 to before 2fe399bb8efd0d325ab1138cf8e3ecf23a39e96dAffected
  • af224ca2df297440448b9d407d21b50982c6d532 to before 399927f0f875b93f3d5a0336d382ba48b8671eb2Affected
  • af224ca2df297440448b9d407d21b50982c6d532 to before d7b5876a6e74cdf8468a478be6b23f2f5464ac7aAffected
  • af224ca2df297440448b9d407d21b50982c6d532 to before e418d91195d29d5f9c9685ff309b92b04b41dc40Affected
  • af224ca2df297440448b9d407d21b50982c6d532 to before 76ed24a34223bb2c6b6162e1d8389ec4e602a290Affected
  • af224ca2df297440448b9d407d21b50982c6d532 to before 602babaa84d627923713acaf5f7e9a4369e77473Affected
LinuxLinux
  • 4.7Affected
  • before 4.7Not affected
  • 5.10.229 through 5.10.*Not affected
  • 5.15.170 through 5.15.*Not affected
  • 6.1.115 through 6.1.*Not affected
  • 6.6.57 through 6.6.*Not affected
  • 6.11.4 through 6.11.*Not affected
  • 6.12 and laterNot affected

References

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