Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2024-26861

CVE-2024-26861MEDIUM

Linux Linux — wireguard: receive: annotate data-race around receiving_counter.counter

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   H   L   N  U  N  N  H    4.7   .0018    6.8     —

AFFECTED
  Product  Versions                                    Fixed
  Linux    a9e90d9931f3a474f04bab782ccd9d77904941e9 –  —
  Linux    5.7 –                                       5.10.214

TIMELINE
  Feb 19  Reserved by Linux
  Apr 17  Published (CNA: Linux)
  Oct 15  ENRICHED — CVE-2024-26861 (Linux). Received CVSS 4.7 and CPE data from NVD.

CWE-362 · CNA: Linux · CVSS v3.1 · 9 references · NVD status: Modified

Description

In the Linux kernel, the following vulnerability has been resolved: wireguard: receive: annotate data-race around receiving_counter.counter Syzkaller with KCSAN identified a data-race issue when accessing keypair->receiving_counter.counter. Use READ_ONCE() and WRITE_ONCE() annotations to mark the data race as intentional. BUG: KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll write to 0xffff888107765888 of 8 bytes by interrupt on cpu 0: counter_validate drivers/net/wireguard/receive.c:321 [inline] wg_packet_rx_poll+0x3ac/0xf00 drivers/net/wireguard/receive.c:461 __napi_poll+0x60/0x3b0 net/core/dev.c:6536 napi_poll net/core/dev.c:6605 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6738 __do_softirq+0xc4/0x279 kernel/softirq.c:553 do_softirq+0x5e/0x90 kernel/softirq.c:454 __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline] wg_packet_decrypt_worker+0x6c5/0x700 drivers/net/wireguard/receive.c:499 process_one_work kernel/workqueue.c:2633 [inline] ... read to 0xffff888107765888 of 8 bytes by task 3196 on cpu 1: decrypt_packet drivers/net/wireguard/receive.c:252 [inline] wg_packet_decrypt_worker+0x220/0x700 drivers/net/wireguard/receive.c:501 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2706 worker_thread+0x525/0x730 kernel/workqueue.c:2787 ...

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
February 19, 2024	Reserved	Reserved by Linux
April 17, 2024	Published	Published (CNA: Linux)
October 15, 2026	ENRICHED	ENRICHED — CVE-2024-26861 (Linux). Received CVSS 4.7 and CPE data from NVD.

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Linux	Linux	—	a9e90d9931f3a474f04bab782ccd9d77904941e9	—
Linux	Linux	—	5.7	5.10.214

Weaknesses

CWE-362

References (9)

Authoritative record: CVE-2024-26861 at cve.org

Vendors: linux

Weaknesses: CWE-362

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-26861 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.