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CVE-2026-74297— RDMA/mlx5: Fix undefined shift of user RQ WQE size

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 3.11版本存在安全漏洞，该漏洞源于set_rq_size()函数对用户提供的rq_wqe_shift参数验证不足，导致计算RQ WQE大小时发生未定义移位行为。

CVSS 7.8 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< 9fff54929cc00849d738faa99f06c32399aeb026 affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< b746f949c2ac2b041102836095d6d4a2ef21fa75 affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< c1dbf52d24a8cb1aa56780ba51b72e7d495f258c affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< 6fc874fdfb366bfb11c62e6af9a831c8be59ddda affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< 42f3d2c8c18b92ea33e506a38b64f1a8986c2823 affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< 4b87a2497276a72fd63028e7419abf0fb7ed837b affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< b732db02a2b04cde393638df19de6251ce62a74e affected
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c< d881d60223aac8fdc12b227d89c76e131e92a9cd affected
… +10 more rows
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I. Basic Information for CVE-2026-74297

Vulnerability Information
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Vulnerability Title
RDMA/mlx5: Fix undefined shift of user RQ WQE size
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix undefined shift of user RQ WQE size set_rq_size() computes the RQ WQE size as "1 << rq_wqe_shift" based on the user-provided rq_wqe_shift, which is only checked to be greater than 32, so shifts of 32 are still accepted. A shift of 31 also overflows a signed integer, leading to undefined behavior. Use check_shl_overflow() to compute the RQ WQE size and reject any invalid values.
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 3.11版本存在安全漏洞，该漏洞源于set_rq_size()函数对用户提供的rq_wqe_shift参数验证不足，导致计算RQ WQE大小时发生未定义移位行为。
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 ~ 9fff54929cc00849d738faa99f06c32399aeb026 -
Linux Linux 3.11 -

II. Public POCs for CVE-2026-74297

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III. Intelligence Information for CVE-2026-74297

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Patches & Fixes for CVE-2026-74297 (8)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-74350 9.8 CRITICAL ocfs2: validate fast symlink target during inode read
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-72248 9.8 CRITICAL netfilter: flowtable: support IPIP tunnel with direct xmit
CVE-2026-72494 9.8 CRITICAL RDMA/irdma: Replace waitqueue and flag with completion
CVE-2026-74345 9.8 CRITICAL RDMA/siw: Fix endpoint/socket association handling
CVE-2026-72083 9.8 CRITICAL scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE
CVE-2026-72098 9.8 CRITICAL dm-verity: fix buffer overflow in FEC calculation
CVE-2026-72226 9.8 CRITICAL batman-adv: tt: prevent TVLV OOB check overflow
CVE-2026-74255 9.8 CRITICAL tipc: fix UAF in tipc_l2_send_msg()
CVE-2026-74428 9.8 CRITICAL rxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-72084 9.8 CRITICAL scsi: target: Bound PR-OUT TransportID parsing to the received buffer
CVE-2026-72234 9.8 CRITICAL batman-adv: access unicast_ttvn skb->data only after skb realloc

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74297

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