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CVE-2026-72344— net/mlx5e: TC, skip peer flow cleanup when LAG seq is unavailable

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 7.1版本存在安全漏洞，该漏洞源于LAG序列不可用时mlx5_lag_get_dev_seq()返回值未正确处理，可能导致错误内存访问和内核崩溃。

CVSS 7.8 · High EPSS 0.17% · P5

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 971b28accc09436fe6a6d5afd667dcbfb3ed7e03< 5a95aa0198af75047d98fb72950642c89dab770f affected
971b28accc09436fe6a6d5afd667dcbfb3ed7e03< 7bed4af0ced82948d660205efecd551ef8bc3912 affected
7.1 affected
< 7.1 unaffected
7.1.5≤ 7.1.* unaffected
7.2≤ * unaffected
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I. Basic Information for CVE-2026-72344

Vulnerability Information
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Vulnerability Title
net/mlx5e: TC, skip peer flow cleanup when LAG seq is unavailable
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: TC, skip peer flow cleanup when LAG seq is unavailable mlx5_lag_get_dev_seq() will return error when the peer isn't in the LAG or when no device is marked as master. Result bad memory access and kernel crash[1]. Hence, skip the peer when lookup fails. Note: In case there are peer flows, they are cleaned before LAG cleared the master mark. [1] RIP: 0010:mlx5e_tc_del_fdb_peers_flow+0x3d/0x350 [mlx5_core] Call Trace: <TASK> mlx5e_tc_clean_fdb_peer_flows+0xc1/0x130 [mlx5_core] mlx5_esw_offloads_unpair+0x3a/0x400 [mlx5_core] mlx5_esw_offloads_devcom_event+0xee/0x360 [mlx5_core] mlx5_devcom_send_event+0x7a/0x140 [mlx5_core] mlx5_esw_offloads_devcom_cleanup+0x2f/0x90 [mlx5_core] mlx5e_tc_esw_cleanup+0x28/0xf0 [mlx5_core] mlx5e_rep_tc_cleanup+0x19/0x30 [mlx5_core] mlx5e_cleanup_uplink_rep_tx+0x36/0x40 [mlx5_core] mlx5e_cleanup_rep_tx+0x55/0x60 [mlx5_core] mlx5e_detach_netdev+0x96/0xf0 [mlx5_core] mlx5e_netdev_change_profile+0x5b/0x120 [mlx5_core] mlx5e_netdev_attach_nic_profile+0x1b/0x30 [mlx5_core] mlx5e_vport_rep_unload+0xdd/0x110 [mlx5_core] __esw_offloads_unload_rep+0x81/0xb0 [mlx5_core] mlx5_eswitch_unregister_vport_reps+0x1d7/0x220 [mlx5_core] mlx5e_rep_remove+0x22/0x30 [mlx5_core] device_release_driver_internal+0x194/0x1f0 bus_remove_device+0xe8/0x1b0 device_del+0x159/0x3c0 mlx5_rescan_drivers_locked+0xbc/0x2d0 [mlx5_core] mlx5_unregister_device+0x54/0x80 [mlx5_core] mlx5_uninit_one+0x73/0x130 [mlx5_core] remove_one+0x78/0xe0 [mlx5_core] pci_device_remove+0x39/0xa0
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 7.1版本存在安全漏洞，该漏洞源于LAG序列不可用时mlx5_lag_get_dev_seq()返回值未正确处理，可能导致错误内存访问和内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 971b28accc09436fe6a6d5afd667dcbfb3ed7e03 ~ 5a95aa0198af75047d98fb72950642c89dab770f -
Linux Linux 7.1 -

II. Public POCs for CVE-2026-72344

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III. Intelligence Information for CVE-2026-72344

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Patches & Fixes for CVE-2026-72344 (2)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72041 9.8 CRITICAL espintcp: use sk_msg_free_partial to fix partial send
CVE-2026-74436 9.8 CRITICAL rxrpc: serialize kernel accept preallocation with socket teardown
CVE-2026-72210 9.8 CRITICAL ntfs: fix off-by-one in mapping pairs decoding bounds checks
CVE-2026-72211 9.8 CRITICAL ntfs: grow index root value before reparent header update
CVE-2026-72209 9.8 CRITICAL ntfs: validate attribute values on lookup
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-74434 9.8 CRITICAL rxrpc: Don't move a peeked OOB message onto the pending queue
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-72473 9.8 CRITICAL xprtrdma: Decouple req recycling from RPC completion
CVE-2026-72472 9.8 CRITICAL nfs: use nfsi->rwsem to protect traversal of the file lock list
CVE-2026-74545 9.8 CRITICAL rtase: fix double free of multi-frag skb on DMA map failure
CVE-2026-72322 9.8 CRITICAL ipv6: mcast: Fix potential UAF in MLD delayed work

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72344

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