CVE-2026-68434 (GCVE-0-2026-68434)
Vulnerability from cvelistv5 – Published: 2026-08-12 00:07 – Updated: 2026-08-23 12:46
VLAI
EPSS
VEX
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
8 references
Impacted products
2 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) |
guessed | |
| 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) |
guessed |
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},
{
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"status": "affected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThan": "6.1.183",
"status": "affected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThan": "6.6.148",
"status": "affected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThan": "6.12.101",
"status": "affected",
"version": "6.12.96",
"versionType": "semver"
},
{
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},
{
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"version": "7.1.4",
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}
]
}
],
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"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-23T12:46:23.299Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
{
"url": "https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339"
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{
"url": "https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c"
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{
"url": "https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1"
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{
"url": "https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10"
},
{
"url": "https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e"
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{
"url": "https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d"
}
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"datePublished": "2026-08-12T00:07:21.897Z",
"dateReserved": "2026-07-30T09:28:09.393Z",
"dateUpdated": "2026-08-23T12:46:23.299Z",
"state": "PUBLISHED"
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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": "CVE-2026-68434",
"lastModified": "2026-08-23T13:16:36.980",
"metrics": {},
"published": "2026-08-12T00:17:43.520",
"references": [
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],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-08-31T11:45:44+00:00",
"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": "228",
"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"
}
}
}
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