Medium 4.7Published Feb 18, 2026

CVE-2026-23212bonding: annotate data-races around slave->last_rx

Updated under an hour ago (Oct 27, 2026, 5:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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

CVSS: 4.7 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f5b2b966f032f22d3a289045a5afd4afa09f09c6 before a7516cb0165926d308187e231ccd330e5e3ebff7; from f5b2b966f032f22d3a289045a5afd4afa09f09c6 before 8c0be3277e7aefb2f900fc37ca3fe7df362e26f5; from f5b2b966f032f22d3a289045a5afd4afa09f09c6 before b956289b83887e0a306067b6003c3fcd81bfdf84; from f5b2b966f032f22d3a289045a5afd4afa09f09c6 before bd98324e327e41de04b13e372cc16f73150df254; from f5b2b966f032f22d3a289045a5afd4afa09f09c6 before f6c3665b6dc53c3ab7d31b585446a953a74340ef	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.19 before 6.1.162; from 6.2 before 6.6.123; from 6.7 before 6.12.69; from 6.13 before 6.18.9; 6.19; 6.19; 6.19; 6.19; and 3 more ranges	NVD

References

References

https://git.kernel.org/stable/c/a7516cb0165926d308187e231ccd330e5e3ebff7	patch
https://git.kernel.org/stable/c/8c0be3277e7aefb2f900fc37ca3fe7df362e26f5	patch
https://git.kernel.org/stable/c/b956289b83887e0a306067b6003c3fcd81bfdf84	patch
https://git.kernel.org/stable/c/bd98324e327e41de04b13e372cc16f73150df254	patch
https://git.kernel.org/stable/c/f6c3665b6dc53c3ab7d31b585446a953a74340ef	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.