CVE-2026-68434serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms
Updated under an hour ago ()
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 763d61ded752fbb3116efc951eff4363f237b7e0 before bdaa8871b53fe9b1730ef64dda2fcd662fd83339; from c7d190bb07bf4e3b217c69370e94d1b4c80a40ad before f85a42fb90399dedcf81c146d09c07e4548b1e8c; from 0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c before 4ea933a36a14bec19b71025cdd8407bafbd67ec1; from 587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6 before 1096397c31f6bffa95e77bdd18fbca085be83e10; 977855894bca4b87afa50d21e3f3e85a5a0e901f builds before 600dcd548fb2b00a69f447684f52ba45d5a3540e; from 1cd54e217c6e2cdb794a897b2f855e13ffcee586 before b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56; 9690e8a342632344984af72bc56b7a1fba61e6cb builds before 8cbad52ccfa6a7f089cfab34979bc6cc3bff25be; from b1b4efea05a56c0995e4702a86d6624b4fdff32f before 7fb13fd7e9a59a37cd911efff83abe19e3ee029d | CNA record |
References
- https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339
- https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c
- https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1
- https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10
- https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e
- https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56
- https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be
- https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.