{"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":"2026-08-19T16:30:41.982Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-19T16:30:41.982Z"},"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":"c06470320f8156306986a831010cdc9f9f87cb50","status":"affected","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"0d5aaf91a3d05f7f993401af27872a5fc0f26edc","status":"affected","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"3635a9e8b453e658a49b39d025f35bbc6e58d0e2","status":"affected","versionType":"git"},{"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":"5.10.265","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","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","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":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.1.183"},{"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"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c06470320f8156306986a831010cdc9f9f87cb50"},{"url":"https://git.kernel.org/stable/c/0d5aaf91a3d05f7f993401af27872a5fc0f26edc"},{"url":"https://git.kernel.org/stable/c/3635a9e8b453e658a49b39d025f35bbc6e58d0e2"},{"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"}}}}