{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68176", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.372Z", "datePublished": "2026-08-10T11:59:47.298Z", "dateUpdated": "2026-08-10T11:59:47.298Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-10T11:59:47.298Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix mmiotrace possible NULL dereferencing of hiter->dev\n\nIf the mmio_pipe_open() fails to find a PCI device, the hiter->dev\nwill be assigned to NULL. The mmiotrace read() function dereferences the\nhiter->dev if hiter exists.\n\nChange the test of the read to not only check hiter being NULL, but also\nthe hiter->dev before dereferencing it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_mmiotrace.c"], "versions": [{"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "faaf95135184208ee3ac6f33175c8d1800669dfc", "status": "affected", "versionType": "git"}, {"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "201a01102c529772168181190cb084471082cf5c", "status": "affected", "versionType": "git"}, {"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "8464427e1c177809a9488a97dfa2807d9dcf323b", "status": "affected", "versionType": "git"}, {"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "724cd84b0546c07806840fa658714488553d13a2", "status": "affected", "versionType": "git"}, {"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "144f29e85702234b23d2a62abf723e6a17eb5427", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_mmiotrace.c"], "versions": [{"version": "2.6.27", "status": "affected"}, {"version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.2-rc5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc"}, {"url": "https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c"}, {"url": "https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b"}, {"url": "https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2"}, {"url": "https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427"}], "title": "tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/trace/trace_mmiotrace.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "faaf95135184208ee3ac6f33175c8d1800669dfc", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "201a01102c529772168181190cb084471082cf5c", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "8464427e1c177809a9488a97dfa2807d9dcf323b", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "724cd84b0546c07806840fa658714488553d13a2", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "144f29e85702234b23d2a62abf723e6a17eb5427", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/trace/trace_mmiotrace.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.27"}, {"lessThan": "2.6.27", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix mmiotrace possible NULL dereferencing of hiter->dev\n\nIf the mmio_pipe_open() fails to find a PCI device, the hiter->dev\nwill be assigned to NULL. The mmiotrace read() function dereferences the\nhiter->dev if hiter exists.\n\nChange the test of the read to not only check hiter being NULL, but also\nthe hiter->dev before dereferencing it."}], "id": "CVE-2026-68176", "lastModified": "2026-08-10T13:20:04.490", "metrics": {}, "published": "2026-08-10T13:20:04.490", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,faaf95135184208ee3ac6f33175c8d1800669dfc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,201a01102c529772168181190cb084471082cf5c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,724cd84b0546c07806840fa658714488553d13a2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,8464427e1c177809a9488a97dfa2807d9dcf323b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,144f29e85702234b23d2a62abf723e6a17eb5427)"}}], "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": "2.6.27"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.27)"}}, {"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": "[7.2-rc5,*]"}}], "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": "2026-08-10T17:45:04.363932+00:00", "updated": "2026-08-10T18:45:17.009967+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}