{"id":"CVE-2023-53660","summary":"bpf, cpumap: Handle skb as well when clean up ptr_ring","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, cpumap: Handle skb as well when clean up ptr_ring\n\nThe following warning was reported when running xdp_redirect_cpu with\nboth skb-mode and stress-mode enabled:\n\n  ------------[ cut here ]------------\n  Incorrect XDP memory type (-2128176192) usage\n  WARNING: CPU: 7 PID: 1442 at net/core/xdp.c:405\n  Modules linked in:\n  CPU: 7 PID: 1442 Comm: kworker/7:0 Tainted: G  6.5.0-rc2+ #1\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n  Workqueue: events __cpu_map_entry_free\n  RIP: 0010:__xdp_return+0x1e4/0x4a0\n  ......\n  Call Trace:\n   \u003cTASK\u003e\n   ? show_regs+0x65/0x70\n   ? __warn+0xa5/0x240\n   ? __xdp_return+0x1e4/0x4a0\n   ......\n   xdp_return_frame+0x4d/0x150\n   __cpu_map_entry_free+0xf9/0x230\n   process_one_work+0x6b0/0xb80\n   worker_thread+0x96/0x720\n   kthread+0x1a5/0x1f0\n   ret_from_fork+0x3a/0x70\n   ret_from_fork_asm+0x1b/0x30\n   \u003c/TASK\u003e\n\nThe reason for the warning is twofold. One is due to the kthread\ncpu_map_kthread_run() is stopped prematurely. Another one is\n__cpu_map_ring_cleanup() doesn't handle skb mode and treats skbs in\nptr_ring as XDP frames.\n\nPrematurely-stopped kthread will be fixed by the preceding patch and\nptr_ring will be empty when __cpu_map_ring_cleanup() is called. But\nas the comments in __cpu_map_ring_cleanup() said, handling and freeing\nskbs in ptr_ring as well to \"catch any broken behaviour gracefully\".","modified":"2026-04-02T09:44:48.898403Z","published":"2025-10-07T15:21:20.307Z","related":["SUSE-SU-2025:21040-1","SUSE-SU-2025:21052-1","SUSE-SU-2025:21056-1","SUSE-SU-2025:21064-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4128-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4140-1","SUSE-SU-2025:4141-1","SUSE-SU-2025:4301-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53660.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/7c62b75cd1a792e14b037fa4f61f9b18914e7de1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/937345720d18f1ad006ba3d5dcb3fa121037b8a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b58d34068fd9f96bfc7d389988dfaf9a92a8fe00"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cbd000451885801e9bbfd9cf7a7946806a85cb5e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53660.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53660"},{"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":"11941f8a85362f612df61f4aaab0e41b64d2111d"},{"fixed":"b58d34068fd9f96bfc7d389988dfaf9a92a8fe00"},{"fixed":"cbd000451885801e9bbfd9cf7a7946806a85cb5e"},{"fixed":"937345720d18f1ad006ba3d5dcb3fa121037b8a2"},{"fixed":"7c62b75cd1a792e14b037fa4f61f9b18914e7de1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53660.json"}}],"schema_version":"1.7.5"}