{"id":"CVE-2026-68176","summary":"tracing: Fix mmiotrace possible NULL dereferencing of hiter-\u003edev","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix mmiotrace possible NULL dereferencing of hiter-\u003edev\n\nIf the mmio_pipe_open() fails to find a PCI device, the hiter-\u003edev\nwill be assigned to NULL. The mmiotrace read() function dereferences the\nhiter-\u003edev if hiter exists.\n\nChange the test of the read to not only check hiter being NULL, but also\nthe hiter-\u003edev before dereferencing it.","modified":"2026-08-12T04:18:46.203669136Z","published":"2026-08-10T11:59:47.298Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68176.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427"},{"type":"WEB","url":"https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68176.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68176"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f984b51e0779a6dd30feedc41404013ca54e5d05"},{"fixed":"faaf95135184208ee3ac6f33175c8d1800669dfc"},{"fixed":"201a01102c529772168181190cb084471082cf5c"},{"fixed":"8464427e1c177809a9488a97dfa2807d9dcf323b"},{"fixed":"724cd84b0546c07806840fa658714488553d13a2"},{"fixed":"144f29e85702234b23d2a62abf723e6a17eb5427"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68176.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.27"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68176.json"}}],"schema_version":"1.9.0"}