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CVE-2025-22086— RDMA/mlx5: Fix mlx5_poll_one() cur_qp update flow

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mlx5_poll_one中cur_qp更新逻辑错误，可能导致空指针解引用。

CVSS 8.8 · High EPSS 0.29% · P21

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< 3b97d77049856865ac5ce8ffbc6e716928310f7f affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< 856d9e5d72dc44eca6d5a153581c58fbd84e92e1 affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< f0447ceb8a31d79bee7144f98f9a13f765531e1a affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< dc7139b7031d877acd73d7eff55670f22f48cd5e affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< 7c51a6964b45b6d40027abd77e89cef30d26dc5a affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< cad677085274ecf9c7565b5bfc5d2e49acbf174c affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< 55c65a64aefa6267b964d90e9a4039cb68ec73a5 affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< d52636eb13ccba448a752964cc6fc49970912874 affected
… +12 more rows
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I. Basic Information for CVE-2025-22086

Vulnerability Information
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Vulnerability Title
RDMA/mlx5: Fix mlx5_poll_one() cur_qp update flow
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix mlx5_poll_one() cur_qp update flow When cur_qp isn't NULL, in order to avoid fetching the QP from the radix tree again we check if the next cqe QP is identical to the one we already have. The bug however is that we are checking if the QP is identical by checking the QP number inside the CQE against the QP number inside the mlx5_ib_qp, but that's wrong since the QP number from the CQE is from FW so it should be matched against mlx5_core_qp which is our FW QP number. Otherwise we could use the wrong QP when handling a CQE which could cause the kernel trace below. This issue is mainly noticeable over QPs 0 & 1, since for now they are the only QPs in our driver whereas the QP number inside mlx5_ib_qp doesn't match the QP number inside mlx5_core_qp. BUG: kernel NULL pointer dereference, address: 0000000000000012 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP CPU: 0 UID: 0 PID: 7927 Comm: kworker/u62:1 Not tainted 6.14.0-rc3+ #189 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 Workqueue: ib-comp-unb-wq ib_cq_poll_work [ib_core] RIP: 0010:mlx5_ib_poll_cq+0x4c7/0xd90 [mlx5_ib] Code: 03 00 00 8d 58 ff 21 cb 66 39 d3 74 39 48 c7 c7 3c 89 6e a0 0f b7 db e8 b7 d2 b3 e0 49 8b 86 60 03 00 00 48 c7 c7 4a 89 6e a0 <0f> b7 5c 98 02 e8 9f d2 b3 e0 41 0f b7 86 78 03 00 00 83 e8 01 21 RSP: 0018:ffff88810511bd60 EFLAGS: 00010046 RAX: 0000000000000010 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88885fa1b3c0 RDI: ffffffffa06e894a RBP: 00000000000000b0 R08: 0000000000000000 R09: ffff88810511bc10 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88810d593000 R13: ffff88810e579108 R14: ffff888105146000 R15: 00000000000000b0 FS: 0000000000000000(0000) GS:ffff88885fa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000012 CR3: 00000001077e6001 CR4: 0000000000370eb0 Call Trace: <TASK> ? __die+0x20/0x60 ? page_fault_oops+0x150/0x3e0 ? exc_page_fault+0x74/0x130 ? asm_exc_page_fault+0x22/0x30 ? mlx5_ib_poll_cq+0x4c7/0xd90 [mlx5_ib] __ib_process_cq+0x5a/0x150 [ib_core] ib_cq_poll_work+0x31/0x90 [ib_core] process_one_work+0x169/0x320 worker_thread+0x288/0x3a0 ? work_busy+0xb0/0xb0 kthread+0xd7/0x1f0 ? kthreads_online_cpu+0x130/0x130 ? kthreads_online_cpu+0x130/0x130 ret_from_fork+0x2d/0x50 ? kthreads_online_cpu+0x130/0x130 ret_from_fork_asm+0x11/0x20 </TASK>
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mlx5_poll_one中cur_qp更新逻辑错误，可能导致空指针解引用。
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 e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c ~ 3b97d77049856865ac5ce8ffbc6e716928310f7f -
Linux Linux 3.11 -

II. Public POCs for CVE-2025-22086

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III. Intelligence Information for CVE-2025-22086

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Other References for CVE-2025-22086 (7)

Same Patch Batch · Linux · 2025-04-16 · 127 CVEs total

CVE-2025-22021 10.0 CRITICAL netfilter: socket: Lookup orig tuple for IPv6 SNAT
CVE-2025-22088 9.8 CRITICAL RDMA/erdma: Prevent use-after-free in erdma_accept_newconn()
CVE-2025-22110 9.8 CRITICAL netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error
CVE-2025-22077 9.8 CRITICAL Revert "smb: client: fix TCP timers deadlock after rmmod"
CVE-2025-22118 8.8 HIGH ice: validate queue quanta parameters to prevent OOB access
CVE-2025-22074 8.8 HIGH ksmbd: fix r_count dec/increment mismatch
CVE-2025-22040 8.8 HIGH ksmbd: fix session use-after-free in multichannel connection
CVE-2025-22041 8.8 HIGH ksmbd: fix use-after-free in ksmbd_sessions_deregister()
CVE-2024-58096 8.8 HIGH wifi: ath11k: add srng->lock for ath11k_hal_srng_* in monitor mode
CVE-2025-23133 8.8 HIGH wifi: ath11k: update channel list in reg notifier instead reg worker
CVE-2025-22039 8.8 HIGH ksmbd: fix overflow in dacloffset bounds check
CVE-2025-22117 8.7 HIGH ice: fix using untrusted value of pkt_len in ice_vc_fdir_parse_raw()
CVE-2025-22108 8.6 HIGH bnxt_en: Mask the bd_cnt field in the TX BD properly
CVE-2025-22080 8.4 HIGH fs/ntfs3: Prevent integer overflow in hdr_first_de()
CVE-2025-22121 8.4 HIGH ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all()
CVE-2025-22038 8.3 HIGH ksmbd: validate zero num_subauth before sub_auth is accessed
CVE-2025-22043 8.1 HIGH ksmbd: add bounds check for durable handle context
CVE-2025-22042 8.1 HIGH ksmbd: add bounds check for create lease context
CVE-2025-22085 7.8 HIGH RDMA/core: Fix use-after-free when rename device name
CVE-2025-22114 7.8 HIGH btrfs: don't clobber ret in btrfs_validate_super()

Showing top 20 of 127 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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