Description
In the Linux kernel, the following vulnerability has been resolved:
serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms
Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false, ...), which evaluates to NULL. However, the three call sites in mid8250_probe() and mid8250_remove() unconditionally dereference these function pointers without NULL checks, causing a NULL pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), or Snowridge (SNR) platform.
Fix this by adding the missing NULL checks before calling the setup and exit callbacks.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 763d61ded752fbb3116efc951eff4363f237b7e0, < bdaa8871b53fe9b1730ef64dda2fcd662fd83339; >= c7d190bb07bf4e3b217c69370e94d1b4c80a40ad, < f85a42fb90399dedcf81c146d09c07e4548b1e8c; >= 0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c, < 4ea933a36a14bec19b71025cdd8407bafbd67ec1; >= 587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6, < 1096397c31f6bffa95e77bdd18fbca085be83e10; >= 977855894bca4b87afa50d21e3f3e85a5a0e901f, < 600dcd548fb2b00a69f447684f52ba45d5a3540e; >= 1cd54e217c6e2cdb794a897b2f855e13ffcee586, < b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56; >= 9690e8a342632344984af72bc56b7a1fba61e6cb, < 8cbad52ccfa6a7f089cfab34979bc6cc3bff25be; >= b1b4efea05a56c0995e4702a86d6624b4fdff32f, < 7fb13fd7e9a59a37cd911efff83abe19e3ee029d |
| Linux | Linux | >= 5.10.261, < 5.10.266; >= 5.15.212, < 5.15.217; >= 6.1.178, < 6.1.183; >= 6.6.145, < 6.6.148; >= 6.12.96, < 6.12.101; >= 6.18.39, < 6.18.42; >= 7.1.4, < 7.1.6 |
References
- https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10
- https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1
- https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e
- https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d
- https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be
- https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56
- https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339
- https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c
Timeline
- Published
- Aug 12, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Received