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CVE-2026-74296— RDMA/mlx5: Release the HW‑provided UAR index rather than the SW one

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 4.16版本存在安全漏洞，该漏洞源于RDMA/mlx5子系统释放了硬件提供的UAR索引而非软件索引。

CVSS 7.8 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1564 · Hide Artifacts

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 4ed131d0bb1597ce12fff22d9d7fc9720a6e8cf0< 80f1f49f53a42733e60c90e0ec545e647969214d affected
4ed131d0bb1597ce12fff22d9d7fc9720a6e8cf0< aabfc845838ef453f1d22d7665596f9cc48be7dd affected
4ed131d0bb1597ce12fff22d9d7fc9720a6e8cf0< 6f83de384ca582fa87b4c2b0d03bd1ed3bf9a2ee affected
4ed131d0bb1597ce12fff22d9d7fc9720a6e8cf0< d3ff718c0c7153e2641e6a09507bace14fc5c402 affected
4ed131d0bb1597ce12fff22d9d7fc9720a6e8cf0< ef369446f62903ea079e8a7954b5bf8bb8300fe3 affected
4ed131d0bb1597ce12fff22d9d7fc9720a6e8cf0< 449ae7927152e46acbe5f19f97eafdae6d3a96b1 affected
4.16 affected
< 4.16 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-74296

Vulnerability Information
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Vulnerability Title
RDMA/mlx5: Release the HW‑provided UAR index rather than the SW one
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Release the HW‑provided UAR index rather than the SW one Free the UAR index returned by the hardware.
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 4.16版本存在安全漏洞，该漏洞源于RDMA/mlx5子系统释放了硬件提供的UAR索引而非软件索引。
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 4ed131d0bb1597ce12fff22d9d7fc9720a6e8cf0 ~ 80f1f49f53a42733e60c90e0ec545e647969214d -
Linux Linux 4.16 -

II. Public POCs for CVE-2026-74296

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III. Intelligence Information for CVE-2026-74296

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Patches & Fixes for CVE-2026-74296 (5)

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

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