{"id":"CVE-2024-26861","summary":"wireguard: receive: annotate data-race around receiving_counter.counter","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: receive: annotate data-race around receiving_counter.counter\n\nSyzkaller with KCSAN identified a data-race issue when accessing\nkeypair-\u003ereceiving_counter.counter. Use READ_ONCE() and WRITE_ONCE()\nannotations to mark the data race as intentional.\n\n    BUG: KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll\n\n    write to 0xffff888107765888 of 8 bytes by interrupt on cpu 0:\n     counter_validate drivers/net/wireguard/receive.c:321 [inline]\n     wg_packet_rx_poll+0x3ac/0xf00 drivers/net/wireguard/receive.c:461\n     __napi_poll+0x60/0x3b0 net/core/dev.c:6536\n     napi_poll net/core/dev.c:6605 [inline]\n     net_rx_action+0x32b/0x750 net/core/dev.c:6738\n     __do_softirq+0xc4/0x279 kernel/softirq.c:553\n     do_softirq+0x5e/0x90 kernel/softirq.c:454\n     __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381\n     __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]\n     _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210\n     spin_unlock_bh include/linux/spinlock.h:396 [inline]\n     ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]\n     wg_packet_decrypt_worker+0x6c5/0x700 drivers/net/wireguard/receive.c:499\n     process_one_work kernel/workqueue.c:2633 [inline]\n     ...\n\n    read to 0xffff888107765888 of 8 bytes by task 3196 on cpu 1:\n     decrypt_packet drivers/net/wireguard/receive.c:252 [inline]\n     wg_packet_decrypt_worker+0x220/0x700 drivers/net/wireguard/receive.c:501\n     process_one_work kernel/workqueue.c:2633 [inline]\n     process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2706\n     worker_thread+0x525/0x730 kernel/workqueue.c:2787\n     ...","modified":"2026-03-20T12:35:16.414498Z","published":"2024-04-17T10:27:24.980Z","related":["SUSE-SU-2024:1644-1","SUSE-SU-2024:1659-1","SUSE-SU-2024:1663-1","SUSE-SU-2024:2135-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20249-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26861.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3f94da807fe1668b9830f0eefbbf7e887b0a7bc6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/45a83b220c83e3c326513269afbf69ae6fc65cce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/78739d72f16b2d7d549f713f1dfebd678d32484b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bba045dc4d996d03dce6fe45726e78a1a1f6d4c3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d691be84ab898cf136a35176eaf2f8fc116563f0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f87884e0dffd61b47e58bc6e1e2f6843c212b0cc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fdf16de078a97bf14bb8ee2b8d47cc3d3ead09ed"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26861.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26861"},{"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":"a9e90d9931f3a474f04bab782ccd9d77904941e9"},{"fixed":"f87884e0dffd61b47e58bc6e1e2f6843c212b0cc"},{"fixed":"d691be84ab898cf136a35176eaf2f8fc116563f0"},{"fixed":"45a83b220c83e3c326513269afbf69ae6fc65cce"},{"fixed":"78739d72f16b2d7d549f713f1dfebd678d32484b"},{"fixed":"3f94da807fe1668b9830f0eefbbf7e887b0a7bc6"},{"fixed":"fdf16de078a97bf14bb8ee2b8d47cc3d3ead09ed"},{"fixed":"bba045dc4d996d03dce6fe45726e78a1a1f6d4c3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"4a7939808afdc57ecaeb72d049e2985321a1e44e"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26861.json"}}],"schema_version":"1.7.5"}