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CVE-2026-74410— wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer

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存在安全漏洞，该漏洞源于在rtw_pci_rx_napi()中计算new_len时未验证其是否超过DMA缓冲区大小，可能导致越界读取。

CVSS 8.1 · High EPSS 0.42% · P35

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e3037485c68ec1a299ff41160d8fedbd4abc29b9< 913bd7d3d3d842b5c1d2b908a0201efa8fc79793 affected
e3037485c68ec1a299ff41160d8fedbd4abc29b9< 45abc14ab3f15da7d689f1a8809c1a01240a94d9 affected
e3037485c68ec1a299ff41160d8fedbd4abc29b9< 08193e733e5d4790e6c937af86d78793b02709be affected
e3037485c68ec1a299ff41160d8fedbd4abc29b9< 6a3c384393d3f0b41669ed5a2e88744aad9d87c8 affected
e3037485c68ec1a299ff41160d8fedbd4abc29b9< 26c183a86ea4dd1f2ff90c6f783649e7f5722a10 affected
e3037485c68ec1a299ff41160d8fedbd4abc29b9< 01155ded5d4dad61840a9a3c33ab56778ef1f100 affected
e3037485c68ec1a299ff41160d8fedbd4abc29b9< 1554fa522f16ec7c5c342ad33fe734eeb6eb2452 affected
e3037485c68ec1a299ff41160d8fedbd4abc29b9< 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6 affected
… +10 more rows
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I. Basic Information for CVE-2026-74410

Vulnerability Information
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Vulnerability Title
wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer In rtw_pci_rx_napi(), new_len is computed as the sum of pkt_len (14-bit descriptor field, max 16383) and pkt_offset (drv_info_sz + shift, both firmware-controlled). The result can exceed RTK_PCI_RX_BUF_SIZE (11478), causing an out-of-bounds read from the pre-allocated DMA buffer when skb_put_data copies new_len bytes. The USB transport already validates this (rtw_usb_rx_data_put checks against RTW_USB_MAX_RECVBUF_SZ); the PCIe path does not. Add a check that new_len does not exceed the DMA buffer size.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/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存在安全漏洞，该漏洞源于在rtw_pci_rx_napi()中计算new_len时未验证其是否超过DMA缓冲区大小，可能导致越界读取。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux e3037485c68ec1a299ff41160d8fedbd4abc29b9 ~ 913bd7d3d3d842b5c1d2b908a0201efa8fc79793 -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-74410

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III. Intelligence Information for CVE-2026-74410

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Patches & Fixes for CVE-2026-74410 (8)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

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-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
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-2026-74398 9.8 CRITICAL ipv6: addrconf: bail out of dad_failure when state is no longer POSTDAD
CVE-2026-72191 9.8 CRITICAL ntfs3: validate split-point offset in indx_insert_into_buffer
CVE-2026-74401 9.8 CRITICAL dlm: fix add msg handle in send_queue ordered
CVE-2026-72084 9.8 CRITICAL scsi: target: Bound PR-OUT TransportID parsing to the received buffer
CVE-2026-72083 9.8 CRITICAL scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE
CVE-2026-74315 9.8 CRITICAL lockd: Avoid hashing uninitialized bytes in nlm4svc_lookup_file()
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-74493 9.8 CRITICAL net/smc: fix socket use-after-free during link group termination
CVE-2026-74345 9.8 CRITICAL RDMA/siw: Fix endpoint/socket association handling
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72248 9.8 CRITICAL netfilter: flowtable: support IPIP tunnel with direct xmit
CVE-2026-74495 9.8 CRITICAL igbvf: Fix leak in TX DMA error cleanup

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74410

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