CVE-2024-50058
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.
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2fe399bb8efd0d325ab1138cf8e3ecf23a39e96d
- https://git.kernel.org/stable/c/399927f0f875b93f3d5a0336d382ba48b8671eb2
- https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473Patch
- https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290Patch
- https://git.kernel.org/stable/c/d7b5876a6e74cdf8468a478be6b23f2f5464ac7a
- https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40Patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.