CVE-2026-68434 (GCVE-0-2026-68434)
Vulnerability from cvelistv5
Published
2026-08-12 00:07
Modified
2026-08-23 12:46
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 763d61ded752fbb3116efc951eff4363f237b7e0 Version: c7d190bb07bf4e3b217c69370e94d1b4c80a40ad Version: 0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c Version: 587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6 Version: 977855894bca4b87afa50d21e3f3e85a5a0e901f Version: 1cd54e217c6e2cdb794a897b2f855e13ffcee586 Version: 9690e8a342632344984af72bc56b7a1fba61e6cb Version: b1b4efea05a56c0995e4702a86d6624b4fdff32f |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/tty/serial/8250/8250_mid.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "bdaa8871b53fe9b1730ef64dda2fcd662fd83339",
"status": "affected",
"version": "763d61ded752fbb3116efc951eff4363f237b7e0",
"versionType": "git"
},
{
"lessThan": "f85a42fb90399dedcf81c146d09c07e4548b1e8c",
"status": "affected",
"version": "c7d190bb07bf4e3b217c69370e94d1b4c80a40ad",
"versionType": "git"
},
{
"lessThan": "4ea933a36a14bec19b71025cdd8407bafbd67ec1",
"status": "affected",
"version": "0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c",
"versionType": "git"
},
{
"lessThan": "1096397c31f6bffa95e77bdd18fbca085be83e10",
"status": "affected",
"version": "587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6",
"versionType": "git"
},
{
"lessThan": "600dcd548fb2b00a69f447684f52ba45d5a3540e",
"status": "affected",
"version": "977855894bca4b87afa50d21e3f3e85a5a0e901f",
"versionType": "git"
},
{
"lessThan": "b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56",
"status": "affected",
"version": "1cd54e217c6e2cdb794a897b2f855e13ffcee586",
"versionType": "git"
},
{
"lessThan": "8cbad52ccfa6a7f089cfab34979bc6cc3bff25be",
"status": "affected",
"version": "9690e8a342632344984af72bc56b7a1fba61e6cb",
"versionType": "git"
},
{
"lessThan": "7fb13fd7e9a59a37cd911efff83abe19e3ee029d",
"status": "affected",
"version": "b1b4efea05a56c0995e4702a86d6624b4fdff32f",
"versionType": "git"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/tty/serial/8250/8250_mid.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "5.10.266",
"status": "affected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThan": "5.15.217",
"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"
},
{
"lessThan": "6.18.42",
"status": "affected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThan": "7.1.6",
"status": "affected",
"version": "7.1.4",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.266",
"versionStartIncluding": "5.10.261",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.217",
"versionStartIncluding": "5.15.212",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "6.1.178",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.148",
"versionStartIncluding": "6.6.145",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "6.12.96",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "6.18.39",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "7.1.4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339"
},
{
"url": "https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c"
},
{
"url": "https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1"
},
{
"url": "https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10"
},
{
"url": "https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e"
},
{
"url": "https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56"
},
{
"url": "https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be"
},
{
"url": "https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d"
}
],
"title": "serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68434",
"datePublished": "2026-08-12T00:07:21.897Z",
"dateReserved": "2026-07-30T09:28:09.393Z",
"dateUpdated": "2026-08-23T12:46:23.299Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…