{"schema_version":"1.7.5","id":"CVE-2021-47668","published":"2025-04-17T18:15:43.623Z","modified":"2026-03-23T05:12:15.565395Z","related":["SUSE-SU-2025:01600-1","SUSE-SU-2025:01633-1","SUSE-SU-2025:1574-1"],"details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: dev: can_restart: fix use after free bug\n\nAfter calling netif_rx_ni(skb), dereferencing skb is unsafe.\nEspecially, the can_frame cf which aliases skb memory is accessed\nafter the netif_rx_ni() in:\n      stats->rx_bytes += cf->len;\n\nReordering the lines solves the issue.","affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47668.json","unresolved_ranges":[{"events":[{"introduced":"2.6.31"},{"fixed":"4.4.254"}]},{"events":[{"introduced":"4.5"},{"fixed":"4.9.254"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.218"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.171"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.93"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.11"}]},{"events":[{"introduced":"0"},{"last_affected":"5.11-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"5.11-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"5.11-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"5.11-rc4"}]}]}}],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/03f16c5075b22c8902d2af739969e878b0879c94"},{"type":"FIX","url":"https://git.kernel.org/stable/c/08ab951787098ae0b6c0364aeea7a8138226f234"},{"type":"FIX","url":"https://git.kernel.org/stable/c/260925a0b7d2da5449f8ecfd02c1405e0c8a45b8"},{"type":"FIX","url":"https://git.kernel.org/stable/c/593c072b7b3c4d7044416eb039d9ad706bedd67a"},{"type":"FIX","url":"https://git.kernel.org/stable/c/92668d28c7e6a7a2ba07df287669ffcdf650c421"},{"type":"FIX","url":"https://git.kernel.org/stable/c/ac48ef15826e83f4206c47add61072e8fc76d328"},{"type":"FIX","url":"https://git.kernel.org/stable/c/bbc6847b9b8978b520f62fbc7c68c54ef0f8d282"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}