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CVE-2026-74410

HIGHCVSS 8.1/10EPSS 0.18%

Last modified

CVE-2026-74410 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.1/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS Probability
0.18%

7.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= e3037485c68ec1a299ff41160d8fedbd4abc29b9, < 913bd7d3d3d842b5c1d2b908a0201efa8fc79793; >= e3037485c68ec1a299ff41160d8fedbd4abc29b9, < 45abc14ab3f15da7d689f1a8809c1a01240a94d9; >= e3037485c68ec1a299ff41160d8fedbd4abc29b9, < 08193e733e5d4790e6c937af86d78793b02709be; >= e3037485c68ec1a299ff41160d8fedbd4abc29b9, < 6a3c384393d3f0b41669ed5a2e88744aad9d87c8; >= e3037485c68ec1a299ff41160d8fedbd4abc29b9, < 26c183a86ea4dd1f2ff90c6f783649e7f5722a10; >= e3037485c68ec1a299ff41160d8fedbd4abc29b9, < 01155ded5d4dad61840a9a3c33ab56778ef1f100; >= e3037485c68ec1a299ff41160d8fedbd4abc29b9, < 1554fa522f16ec7c5c342ad33fe734eeb6eb2452; >= e3037485c68ec1a299ff41160d8fedbd4abc29b9, < 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6
LinuxLinux5.2

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74410?
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.
How severe is CVE-2026-74410?
CVE-2026-74410 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74410?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST