CVE-2026-68434serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 13 days later
· 13 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 763d61ded752fbb3116efc951eff4363f237b7e0 – < bdaa8871b53fe9b1730ef64dda2fcd662fd83339
- affected c7d190bb07bf4e3b217c69370e94d1b4c80a40ad – < f85a42fb90399dedcf81c146d09c07e4548b1e8c
- affected 0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c – < 4ea933a36a14bec19b71025cdd8407bafbd67ec1
- affected 587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6 – < 1096397c31f6bffa95e77bdd18fbca085be83e10
- affected 977855894bca4b87afa50d21e3f3e85a5a0e901f – < 600dcd548fb2b00a69f447684f52ba45d5a3540e
- affected 1cd54e217c6e2cdb794a897b2f855e13ffcee586 – < b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56
- affected 9690e8a342632344984af72bc56b7a1fba61e6cb – < 8cbad52ccfa6a7f089cfab34979bc6cc3bff25be
- affected b1b4efea05a56c0995e4702a86d6624b4fdff32f – < 7fb13fd7e9a59a37cd911efff83abe19e3ee029d
- affected 5.10.261 – < 5.10.266
- affected 5.15.212 – < 5.15.217
- affected 6.1.178 – < 6.1.183
- affected 6.6.145 – < 6.6.148
- affected 6.12.96 – < 6.12.101
- affected 6.18.39 – < 6.18.42
- affected 7.1.4 – < 7.1.6
References
References8
- https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339 (opens in a new tab)
- https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c (opens in a new tab)
- https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1 (opens in a new tab)
- https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10 (opens in a new tab)
- https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e (opens in a new tab)
- https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56 (opens in a new tab)
- https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be (opens in a new tab)
- https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-57042 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68434)Record last updated .