GHSA-97R7-MPR3-66VH
Vulnerability from github – Published: 2026-08-12 00:31 – Updated: 2026-08-23 15:32In 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.
{
"affected": [],
"aliases": [
"CVE-2026-68434"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-12T00:17:43Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms\n\nCommit b1b4efea05a5 (\"serial: 8250_mid: Disable DMA for selected\nplatforms\") replaced the dnv_board setup and exit callbacks with\nPTR_IF(false, ...), which evaluates to NULL. However, the three call\nsites in mid8250_probe() and mid8250_remove() unconditionally\ndereference these function pointers without NULL checks, causing a NULL\npointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon\nD (ICX-D/CDF), or Snowridge (SNR) platform.\n\nFix this by adding the missing NULL checks before calling the setup and\nexit callbacks.",
"id": "GHSA-97r7-mpr3-66vh",
"modified": "2026-08-23T15:32:57Z",
"published": "2026-08-12T00:31:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68434"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c"
}
],
"schema_version": "1.4.0",
"severity": []
}
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