CVE-2026-23212

bonding: annotate data-races around slave->last_rx

State: Published
Severity: Not scored
Published: Feb 18, 2026
Updated: Oct 19, 2026
Reserved: Jan 13, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

bonding: annotate data-races around slave->last_rx

slave->last_rx and slave->target_last_arp_rx[...] can be read and written locklessly. Add READ_ONCE() and WRITE_ONCE() annotations.

syzbot reported:

BUG: KCSAN: data-race in bond_rcv_validate / bond_rcv_validate

write to 0xffff888149f0d428 of 8 bytes by interrupt on cpu 1: bond_rcv_validate+0x202/0x7a0 drivers/net/bonding/bond_main.c:3335 bond_handle_frame+0xde/0x5e0 drivers/net/bonding/bond_main.c:1533 __netif_receive_skb_core+0x5b1/0x1950 net/core/dev.c:6039 __netif_receive_skb_one_core net/core/dev.c:6150 [inline] __netif_receive_skb+0x59/0x270 net/core/dev.c:6265 netif_receive_skb_internal net/core/dev.c:6351 [inline] netif_receive_skb+0x4b/0x2d0 net/core/dev.c:6410 ...

write to 0xffff888149f0d428 of 8 bytes by interrupt on cpu 0: bond_rcv_validate+0x202/0x7a0 drivers/net/bonding/bond_main.c:3335 bond_handle_frame+0xde/0x5e0 drivers/net/bonding/bond_main.c:1533 __netif_receive_skb_core+0x5b1/0x1950 net/core/dev.c:6039 __netif_receive_skb_one_core net/core/dev.c:6150 [inline] __netif_receive_skb+0x59/0x270 net/core/dev.c:6265 netif_receive_skb_internal net/core/dev.c:6351 [inline] netif_receive_skb+0x4b/0x2d0 net/core/dev.c:6410 br_netif_receive_skb net/bridge/br_input.c:30 [inline] NF_HOOK include/linux/netfilter.h:318 [inline] ...

value changed: 0x0000000100005365 -> 0x0000000100005366

Scores

The record has no CVSS score.

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
LinuxLinux	f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before a7516cb0165926d308187e231ccd330e5e3ebff7Affected f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before 8c0be3277e7aefb2f900fc37ca3fe7df362e26f5Affected f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before b956289b83887e0a306067b6003c3fcd81bfdf84Affected f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before bd98324e327e41de04b13e372cc16f73150df254Affected f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before f6c3665b6dc53c3ab7d31b585446a953a74340efAffected
LinuxLinux	2.6.19Affected before 2.6.19Not affected 6.1.162 through 6.1.Not affected 6.6.123 through 6.6.Not affected 6.12.69 through 6.12.Not affected 6.18.9 through 6.18.Not affected 6.19 and laterNot affected

Product

Versions

LinuxLinux

f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before a7516cb0165926d308187e231ccd330e5e3ebff7Affected
f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before 8c0be3277e7aefb2f900fc37ca3fe7df362e26f5Affected
f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before b956289b83887e0a306067b6003c3fcd81bfdf84Affected
f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before bd98324e327e41de04b13e372cc16f73150df254Affected
f5b2b966f032f22d3a289045a5afd4afa09f09c6 to before f6c3665b6dc53c3ab7d31b585446a953a74340efAffected

LinuxLinux

2.6.19Affected
before 2.6.19Not affected
6.1.162 through 6.1.*Not affected
6.6.123 through 6.6.*Not affected
6.12.69 through 6.12.*Not affected
6.18.9 through 6.18.*Not affected
6.19 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.