CVE-2026-68434 (GCVE-0-2026-68434)

Vulnerability from cvelistv5 – Published: 2026-08-12 00:07 – Updated: 2026-08-23 12:46
VLAI
Title
serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 763d61ded752fbb3116efc951eff4363f237b7e0 , < bdaa8871b53fe9b1730ef64dda2fcd662fd83339 (git)
Affected: c7d190bb07bf4e3b217c69370e94d1b4c80a40ad , < f85a42fb90399dedcf81c146d09c07e4548b1e8c (git)
Affected: 0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c , < 4ea933a36a14bec19b71025cdd8407bafbd67ec1 (git)
Affected: 587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6 , < 1096397c31f6bffa95e77bdd18fbca085be83e10 (git)
Affected: 977855894bca4b87afa50d21e3f3e85a5a0e901f , < 600dcd548fb2b00a69f447684f52ba45d5a3540e (git)
Affected: 1cd54e217c6e2cdb794a897b2f855e13ffcee586 , < b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56 (git)
Affected: 9690e8a342632344984af72bc56b7a1fba61e6cb , < 8cbad52ccfa6a7f089cfab34979bc6cc3bff25be (git)
Affected: b1b4efea05a56c0995e4702a86d6624b4fdff32f , < 7fb13fd7e9a59a37cd911efff83abe19e3ee029d (git)
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Linux Linux Affected: 5.10.261 , < 5.10.266 (semver)
Affected: 5.15.212 , < 5.15.217 (semver)
Affected: 6.1.178 , < 6.1.183 (semver)
Affected: 6.6.145 , < 6.6.148 (semver)
Affected: 6.12.96 , < 6.12.101 (semver)
Affected: 6.18.39 , < 6.18.42 (semver)
Affected: 7.1.4 , < 7.1.6 (semver)
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    "redhat_vex": {
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      "cve": "CVE-2026-68434",
      "id": "CVE-2026-68434",
      "initial_release_date": "2026-08-12T00:00:00+00:00",
      "product_status:known_affected": "49",
      "product_status:known_not_affected": "227",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68434.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-13T01:27:53Z",
      "cve": "CVE-2026-68434",
      "id": "CVE-2026-68434",
      "initial_release_date": "2026-08-12T16:22:06Z",
      "product_status:known_not_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68434",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68434.json",
      "version": "3"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.