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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
af224ca2df297440448b9d407d21b50982c6d532 to < 2fe399bb8efd0d325ab1138cf8e3ecf23a39e96daffectedaf224ca2df297440448b9d407d21b50982c6d532 to < 399927f0f875b93f3d5a0336d382ba48b8671eb2affectedaf224ca2df297440448b9d407d21b50982c6d532 to < d7b5876a6e74cdf8468a478be6b23f2f5464ac7aaffectedaf224ca2df297440448b9d407d21b50982c6d532 to < e418d91195d29d5f9c9685ff309b92b04b41dc40affectedaf224ca2df297440448b9d407d21b50982c6d532 to < 76ed24a34223bb2c6b6162e1d8389ec4e602a290affectedaf224ca2df297440448b9d407d21b50982c6d532 to < 602babaa84d627923713acaf5f7e9a4369e77473affected
Linux Linux
Default version status: affected
4.7affected0 to < 4.7unaffected5.10.229 to ≤ 5.10.*unaffected5.15.170 to ≤ 5.15.*unaffected6.1.115 to ≤ 6.1.*unaffected6.6.57 to ≤ 6.6.*unaffected6.11.4 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/2fe399bb8efd0d325ab1138cf8e3ecf23a39e96d ↗
- https://git.kernel.org/stable/c/399927f0f875b93f3d5a0336d382ba48b8671eb2 ↗
- https://git.kernel.org/stable/c/d7b5876a6e74cdf8468a478be6b23f2f5464ac7a ↗
- https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40 ↗
- https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290 ↗
- https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html ↗