NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package rhcos (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL7-RHCOS-18756079
- published13 Aug 2026
- disclosed12 Aug 2026
Introduced: 12 Aug 2026
CVE-2026-68434 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:7.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rhcos package and not the rhcos package as distributed by RHEL.
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.
References
- https://access.redhat.com/security/cve/CVE-2026-68434
- https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10
- 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/4ea933a36a14bec19b71025cdd8407bafbd67ec1
- https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339
- https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c