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CVE-2026-53230— net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list

CVSS 8.7 · High EPSS 0.12% · P3

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinuxe16aea2744abea612c27ee0eef606c6a6a8204de< 41781f2789309462520a93822e946521ed78f97faffected
e16aea2744abea612c27ee0eef606c6a6a8204de< 537d87784e81c3d7037525b99416455cee088cdcaffected
e16aea2744abea612c27ee0eef606c6a6a8204de< 0f807764bb122fd63aa45f4229cb1ef2679fbd40affected
e16aea2744abea612c27ee0eef606c6a6a8204de< 2398e497389ed4be43f7cfbab499b49cec7dae1aaffected
e16aea2744abea612c27ee0eef606c6a6a8204de< 894e036a24a26a6dd7b17d8d3fb5c53ab48a6074affected
4.5affected
< 4.5unaffected
6.6.143≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-53230

Vulnerability Information
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Vulnerability Title
net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list mlx5_query_nic_vport_mac_list() sizes its firmware command buffer using the PF's log_max_current_uc/mc_list capabilities. When querying a VF vport with a larger configured max (via devlink), the firmware response can overflow this buffer: BUG: KASAN: slab-out-of-bounds in mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core] Read of size 4 at addr ff1100013ffc8a12 by task kworker/u96:2/385 CPU: 12 UID: 0 PID: 385 Comm: kworker/u96:2 Not tainted 7.0.0-rc6+ #1 PREEMPT Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) Workqueue: mlx5_esw_wq esw_vport_change_handler [mlx5_core] Call Trace: <TASK> dump_stack_lvl+0x69/0xa0 print_report+0x176/0x4e4 kasan_report+0xc8/0x100 mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core] esw_update_vport_addr_list+0x2e3/0xda0 [mlx5_core] esw_vport_change_handle_locked+0xa1f/0x1060 [mlx5_core] esw_vport_change_handler+0x6a/0x90 [mlx5_core] process_one_work+0x87f/0x15e0 worker_thread+0x62b/0x1020 kthread+0x375/0x490 ret_from_fork+0x4dc/0x810 ret_from_fork_asm+0x11/0x20 </TASK> Fix by querying the vport's own HCA caps to size the buffer correctly. Refactor the function to allocate and return the MAC list internally, removing the caller's dependency on knowing the correct max.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mlx5_query_nic_vport_mac_list函数的固件命令缓冲区大小使用PF的log_max_current_uc/mc_list能力值，导致在查询具有较大配置最大值的VF vport时出现溢出，可能造成越界读取。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux e16aea2744abea612c27ee0eef606c6a6a8204de ~ 41781f2789309462520a93822e946521ed78f97f -
LinuxLinux 4.5 -

II. Public POCs for CVE-2026-53230

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III. Intelligence Information for CVE-2026-53230

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Patches & Fixes for CVE-2026-53230 (5)

Same Patch Batch · Linux · 2026-06-25 · 146 CVEs total

CVE-2026-531759.8 CRITICALinet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
CVE-2026-532219.8 CRITICALip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-531769.8 CRITICALIB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
CVE-2026-532289.8 CRITICALipv6: sit: reload inner IPv6 header after GSO offloads
CVE-2026-532469.8 CRITICALsctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-532479.8 CRITICALnet: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
CVE-2026-531519.8 CRITICALrxrpc: Fix the ACK parser to extract the SACK table for parsing
CVE-2026-532169.8 CRITICALnet: mvpp2: limit XDP frame size to the RX buffer
CVE-2026-532159.8 CRITICALnet: mvpp2: refill RX buffers before XDP or skb use
CVE-2026-532609.8 CRITICALtcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().
CVE-2026-531319.4 CRITICALnetfilter: require Ethernet MAC header before using eth_hdr()
CVE-2026-531869.1 CRITICALRDMA/srp: bound SRP_RSP sense copy by the received length
CVE-2026-532249.1 CRITICALsctp: validate embedded INIT chunk and address list lengths in cookie
CVE-2026-532259.1 CRITICALsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
CVE-2026-532328.8 HIGHnet: phy: clean the sfp upstream if phy probing fails
CVE-2026-532008.8 HIGHKVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX
CVE-2026-531988.8 HIGHksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL
CVE-2026-532488.8 HIGHnet: airoha: Fix use-after-free in metadata dst teardown
CVE-2026-531708.8 HIGHaccel/ethosu: reject DMA commands with uninitialized length
CVE-2026-531598.8 HIGHmisc: fastrpc: fix DMA address corruption due to find_vma misuse

Showing top 20 of 146 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53230

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