{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68434", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.393Z", "datePublished": "2026-08-12T00:07:21.897Z", "dateUpdated": "2026-08-23T12:46:23.299Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-23T12:46:23.299Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/8250/8250_mid.c"], "versions": [{"version": "763d61ded752fbb3116efc951eff4363f237b7e0", "lessThan": "bdaa8871b53fe9b1730ef64dda2fcd662fd83339", "status": "affected", "versionType": "git"}, {"version": "c7d190bb07bf4e3b217c69370e94d1b4c80a40ad", "lessThan": "f85a42fb90399dedcf81c146d09c07e4548b1e8c", "status": "affected", "versionType": "git"}, {"version": "0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c", "lessThan": "4ea933a36a14bec19b71025cdd8407bafbd67ec1", "status": "affected", "versionType": "git"}, {"version": "587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6", "lessThan": "1096397c31f6bffa95e77bdd18fbca085be83e10", "status": "affected", "versionType": "git"}, {"version": "977855894bca4b87afa50d21e3f3e85a5a0e901f", "lessThan": "600dcd548fb2b00a69f447684f52ba45d5a3540e", "status": "affected", "versionType": "git"}, {"version": "1cd54e217c6e2cdb794a897b2f855e13ffcee586", "lessThan": "b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56", "status": "affected", "versionType": "git"}, {"version": "9690e8a342632344984af72bc56b7a1fba61e6cb", "lessThan": "8cbad52ccfa6a7f089cfab34979bc6cc3bff25be", "status": "affected", "versionType": "git"}, {"version": "b1b4efea05a56c0995e4702a86d6624b4fdff32f", "lessThan": "7fb13fd7e9a59a37cd911efff83abe19e3ee029d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/8250/8250_mid.c"], "versions": [{"version": "5.10.261", "lessThan": "5.10.266", "status": "affected", "versionType": "semver"}, {"version": "5.15.212", "lessThan": "5.15.217", "status": "affected", "versionType": "semver"}, {"version": "6.1.178", "lessThan": "6.1.183", "status": "affected", "versionType": "semver"}, {"version": "6.6.145", "lessThan": "6.6.148", "status": "affected", "versionType": "semver"}, {"version": "6.12.96", "lessThan": "6.12.101", "status": "affected", "versionType": "semver"}, {"version": "6.18.39", "lessThan": "6.18.42", "status": "affected", "versionType": "semver"}, {"version": "7.1.4", "lessThan": "7.1.6", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.261", "versionEndExcluding": "5.10.266"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.212", "versionEndExcluding": "5.15.217"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.178", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.145", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.96", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.39", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1.4", "versionEndExcluding": "7.1.6"}]}]}], "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"}}}}

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{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "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": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms", "id": "2514450", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2514450"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nserial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms\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.\nFix this by adding the missing NULL checks before calling the setup and\nexit callbacks.", "A flaw was found in the Linux kernel's 8250_mid serial driver. This vulnerability occurs due to missing NULL checks before calling setup and exit callbacks, which can result in a NULL pointer dereference. A local attacker could exploit this flaw to cause a kernel oops, leading to a Denial of Service (DoS) on affected Denverton, Ice Lake Xeon D, or Snowridge platforms."], "name": "CVE-2026-68434", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68434\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68434\nhttps://lore.kernel.org/linux-cve-announce/2026081255-CVE-2026-68434-b1c1@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6,1096397c31f6bffa95e77bdd18fbca085be83e10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[977855894bca4b87afa50d21e3f3e85a5a0e901f,600dcd548fb2b00a69f447684f52ba45d5a3540e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1cd54e217c6e2cdb794a897b2f855e13ffcee586,b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9690e8a342632344984af72bc56b7a1fba61e6cb,8cbad52ccfa6a7f089cfab34979bc6cc3bff25be)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b1b4efea05a56c0995e4702a86d6624b4fdff32f,7fb13fd7e9a59a37cd911efff83abe19e3ee029d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[763d61ded752fbb3116efc951eff4363f237b7e0,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7d190bb07bf4e3b217c69370e94d1b4c80a40ad,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.145,6.6.148)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.96,6.12.101)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.18.39,6.18.42)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.1.4,7.1.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "7.2-rc3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,7.2-rc3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-12T16:00:04.248975+00:00", "updated": "2026-08-13T14:15:05.221928+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}