{"id":"CVE-2026-80993","summary":"net: phylink: correctly validate returned PCS in phylink_inband_caps","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phylink: correctly validate returned PCS in phylink_inband_caps\n\nIn phylink_inband_caps(), the PCS returned by mac_select_pcs is only\nchecked if NULL but mac_select_pcs can also return an error pointer.\n\nThis can cause a kernel panic as phylink_pcs_inband_caps() only checks\nif passed PCS is not NULL and directly dereference ops from the phylink_pcs\nstruct.\n\nUse the IS_ERR_OR_NULL macro to address both case where the returned\nPCS can be NULL or an error pointer and prevent a kernel panic.","modified":"2026-09-13T03:47:09.140770906Z","published":"2026-09-11T19:42:49.521Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80993.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/b6b533f83461c3730875cf3ed5ff6362dcb67be9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f2849b1fd059ec9b3281b771e6ac5aad9feee851"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb4d77553841ae85bed9b2cf03351c401e871d85"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80993.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80993"},{"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":"df874f9e52c340cc6f0a0014a97b778f67d46849"},{"fixed":"b6b533f83461c3730875cf3ed5ff6362dcb67be9"},{"fixed":"fb4d77553841ae85bed9b2cf03351c401e871d85"},{"fixed":"f2849b1fd059ec9b3281b771e6ac5aad9feee851"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80993.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80993.json"}}],"schema_version":"1.9.0"}