{"api_version":"1","generated_at":"2026-08-12T18:08:49+00:00","cve":"CVE-2026-68434","urls":{"html":"https://cve.report/CVE-2026-68434","api":"https://cve.report/api/cve/CVE-2026-68434.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68434","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68434"},"summary":{"title":"serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-12 00:17:43","updated_at":"2026-08-12 00:17:43"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e","name":"https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10","name":"https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56","name":"https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d","name":"https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be","name":"https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68434","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68434","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6 1096397c31f6bffa95e77bdd18fbca085be83e10 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 977855894bca4b87afa50d21e3f3e85a5a0e901f 600dcd548fb2b00a69f447684f52ba45d5a3540e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1cd54e217c6e2cdb794a897b2f855e13ffcee586 b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9690e8a342632344984af72bc56b7a1fba61e6cb 8cbad52ccfa6a7f089cfab34979bc6cc3bff25be git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b1b4efea05a56c0995e4702a86d6624b4fdff32f 7fb13fd7e9a59a37cd911efff83abe19e3ee029d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 763d61ded752fbb3116efc951eff4363f237b7e0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c7d190bb07bf4e3b217c69370e94d1b4c80a40ad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.145 6.6.148 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.96 6.12.101 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.39 6.18.42 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.1.4 7.1.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.261 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.212 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.178 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.2-rc3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.148 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"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":"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"},{"status":"affected","version":"763d61ded752fbb3116efc951eff4363f237b7e0","versionType":"git"},{"status":"affected","version":"c7d190bb07bf4e3b217c69370e94d1b4c80a40ad","versionType":"git"},{"status":"affected","version":"0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c","versionType":"git"},{"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"},{"lessThan":"5.11","status":"affected","version":"5.10.261","versionType":"semver"},{"lessThan":"5.16","status":"affected","version":"5.15.212","versionType":"semver"},{"lessThan":"6.2","status":"affected","version":"6.1.178","versionType":"semver"}]},{"defaultStatus":"affected","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":[{"status":"affected","version":"7.2-rc3"},{"lessThan":"7.2-rc3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"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},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc5","versionStartIncluding":"7.2-rc3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.261","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.212","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.178","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":"2026-08-12T00:07:21.897Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"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":"2026-08-12T00:07:21.897Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-12 00:17:43","lastModifiedDate":"2026-08-12 00:17:43","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68434","Ordinal":"1","Title":"serial: 8250_mid: Fix NULL function pointer dereference on DNV/I","CVE":"CVE-2026-68434","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68434","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"serial: 8250_mid: Fix NULL function pointer dereference on DNV/I"}]}}}