High 7.8Published May 27, 2026

CVE-2026-46084RDMA/mana_ib: Disable RX steering on RSS QP destroy

Updated under an hour ago (Oct 26, 2026, 9:00 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: RDMA/mana_ib: Disable RX steering on RSS QP destroy When an RSS QP is destroyed (e.g. DPDK exit), mana_ib_destroy_qp_rss() destroys the RX WQ objects but does not disable vPort RX steering in firmware. This leaves stale steering configuration that still points to the destroyed RX objects. If traffic continues to arrive (e.g. peer VM is still transmitting) and the VF interface is subsequently brought up (mana_open), the firmware may deliver completions using stale CQ IDs from the old RX objects. These CQ IDs can be reused by the ethernet driver for new TX CQs, causing RX completions to land on TX CQs: WARNING: mana_poll_tx_cq+0x1b8/0x220 [mana] (is_sq == false) WARNING: mana_gd_process_eq_events+0x209/0x290 (cq_table lookup fails) Fix this by disabling vPort RX steering before destroying RX WQ objects. Note that mana_fence_rqs() cannot be used here because the fence completion is delivered on the CQ, which is polled by user-mode (e.g. DPDK) and not visible to the kernel driver. Refactor the disable logic into a shared mana_disable_vport_rx() in mana_en, exported for use by mana_ib, replacing the duplicate code. The ethernet driver's mana_dealloc_queues() is also updated to call this common function.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
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: Undergoing Analysis
Record last updated: Jun 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	0266a177631d4c6b963b5b12dd986a8c5abdbf06 builds before 6a2d6273b6c3581ce7b90ce17b5cbb4efd19438f; from 0266a177631d4c6b963b5b12dd986a8c5abdbf06 before f1ccc4d500a0b87a5599343fc2f798048836e184; 0266a177631d4c6b963b5b12dd986a8c5abdbf06 builds before 8ba804869382ce307f2a15f5f6f2adfd791f41dc; 0266a177631d4c6b963b5b12dd986a8c5abdbf06 builds before 3be5ed233de03b00ae868cfc06e95331d8d9007c; from 0266a177631d4c6b963b5b12dd986a8c5abdbf06 before dbeb256e8dd87233d891b170c0b32a6466467036	CNA record
linux linux_kernel linux:linux_kernel	from 6.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4	NVD

References

https://git.kernel.org/stable/c/6a2d6273b6c3581ce7b90ce17b5cbb4efd19438fpatch
https://git.kernel.org/stable/c/f1ccc4d500a0b87a5599343fc2f798048836e184patch
https://git.kernel.org/stable/c/8ba804869382ce307f2a15f5f6f2adfd791f41dcpatch
https://git.kernel.org/stable/c/3be5ed233de03b00ae868cfc06e95331d8d9007cpatch
https://git.kernel.org/stable/c/dbeb256e8dd87233d891b170c0b32a6466467036patch

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.