{"id":"CVE-2022-48850","summary":"net-sysfs: add check for netdevice being present to speed_show","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet-sysfs: add check for netdevice being present to speed_show\n\nWhen bringing down the netdevice or system shutdown, a panic can be\ntriggered while accessing the sysfs path because the device is already\nremoved.\n\n    [  755.549084] mlx5_core 0000:12:00.1: Shutdown was called\n    [  756.404455] mlx5_core 0000:12:00.0: Shutdown was called\n    ...\n    [  757.937260] BUG: unable to handle kernel NULL pointer dereference at           (null)\n    [  758.031397] IP: [\u003cffffffff8ee11acb\u003e] dma_pool_alloc+0x1ab/0x280\n\n    crash\u003e bt\n    ...\n    PID: 12649  TASK: ffff8924108f2100  CPU: 1   COMMAND: \"amsd\"\n    ...\n     #9 [ffff89240e1a38b0] page_fault at ffffffff8f38c778\n        [exception RIP: dma_pool_alloc+0x1ab]\n        RIP: ffffffff8ee11acb  RSP: ffff89240e1a3968  RFLAGS: 00010046\n        RAX: 0000000000000246  RBX: ffff89243d874100  RCX: 0000000000001000\n        RDX: 0000000000000000  RSI: 0000000000000246  RDI: ffff89243d874090\n        RBP: ffff89240e1a39c0   R8: 000000000001f080   R9: ffff8905ffc03c00\n        R10: ffffffffc04680d4  R11: ffffffff8edde9fd  R12: 00000000000080d0\n        R13: ffff89243d874090  R14: ffff89243d874080  R15: 0000000000000000\n        ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018\n    #10 [ffff89240e1a39c8] mlx5_alloc_cmd_msg at ffffffffc04680f3 [mlx5_core]\n    #11 [ffff89240e1a3a18] cmd_exec at ffffffffc046ad62 [mlx5_core]\n    #12 [ffff89240e1a3ab8] mlx5_cmd_exec at ffffffffc046b4fb [mlx5_core]\n    #13 [ffff89240e1a3ae8] mlx5_core_access_reg at ffffffffc0475434 [mlx5_core]\n    #14 [ffff89240e1a3b40] mlx5e_get_fec_caps at ffffffffc04a7348 [mlx5_core]\n    #15 [ffff89240e1a3bb0] get_fec_supported_advertised at ffffffffc04992bf [mlx5_core]\n    #16 [ffff89240e1a3c08] mlx5e_get_link_ksettings at ffffffffc049ab36 [mlx5_core]\n    #17 [ffff89240e1a3ce8] __ethtool_get_link_ksettings at ffffffff8f25db46\n    #18 [ffff89240e1a3d48] speed_show at ffffffff8f277208\n    #19 [ffff89240e1a3dd8] dev_attr_show at ffffffff8f0b70e3\n    #20 [ffff89240e1a3df8] sysfs_kf_seq_show at ffffffff8eedbedf\n    #21 [ffff89240e1a3e18] kernfs_seq_show at ffffffff8eeda596\n    #22 [ffff89240e1a3e28] seq_read at ffffffff8ee76d10\n    #23 [ffff89240e1a3e98] kernfs_fop_read at ffffffff8eedaef5\n    #24 [ffff89240e1a3ed8] vfs_read at ffffffff8ee4e3ff\n    #25 [ffff89240e1a3f08] sys_read at ffffffff8ee4f27f\n    #26 [ffff89240e1a3f50] system_call_fastpath at ffffffff8f395f92\n\n    crash\u003e net_device.state ffff89443b0c0000\n      state = 0x5  (__LINK_STATE_START| __LINK_STATE_NOCARRIER)\n\nTo prevent this scenario, we also make sure that the netdevice is present.","modified":"2026-03-20T12:21:58.140495Z","published":"2024-07-16T12:25:17.824Z","related":["SUSE-SU-2024:2892-1","SUSE-SU-2024:2894-1","SUSE-SU-2024:2901-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2940-1","SUSE-SU-2024:2947-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48850.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/081369ad088a76429984483b8a5f7e967a125aad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3a79f380b3e10edf6caa9aac90163a5d7a282204"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4224cfd7fb6523f7a9d1c8bb91bb5df1e38eb624"},{"type":"WEB","url":"https://git.kernel.org/stable/c/75fc8363227a999e8f3d17e2eb28dce5600dcd3f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8879b5313e9fa5e0c6d6812a0d25d83aed0110e2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8d5e69d8fbf3a35ab4fbe56b8f092802b43f3ef6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a7b9ab04c5932dee7ec95e0abc58b0df350c0dd2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d15c9f6e3335002fea1c33bc8f71a705fa96976c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48850.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-48850"},{"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":"d519e17e2d01a0ee9abe083019532061b4438065"},{"fixed":"a7b9ab04c5932dee7ec95e0abc58b0df350c0dd2"},{"fixed":"081369ad088a76429984483b8a5f7e967a125aad"},{"fixed":"75fc8363227a999e8f3d17e2eb28dce5600dcd3f"},{"fixed":"8879b5313e9fa5e0c6d6812a0d25d83aed0110e2"},{"fixed":"d15c9f6e3335002fea1c33bc8f71a705fa96976c"},{"fixed":"8d5e69d8fbf3a35ab4fbe56b8f092802b43f3ef6"},{"fixed":"3a79f380b3e10edf6caa9aac90163a5d7a282204"},{"fixed":"4224cfd7fb6523f7a9d1c8bb91bb5df1e38eb624"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48850.json"}}],"schema_version":"1.7.5"}