CVE-2026-74410wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/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
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 913bd7d3d3d842b5c1d2b908a0201efa8fc79793; from e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 45abc14ab3f15da7d689f1a8809c1a01240a94d9; from e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 08193e733e5d4790e6c937af86d78793b02709be; from e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 6a3c384393d3f0b41669ed5a2e88744aad9d87c8; from e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 26c183a86ea4dd1f2ff90c6f783649e7f5722a10; from e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 01155ded5d4dad61840a9a3c33ab56778ef1f100; from e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 1554fa522f16ec7c5c342ad33fe734eeb6eb2452; from e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6 | CNA record |
References
- https://git.kernel.org/stable/c/913bd7d3d3d842b5c1d2b908a0201efa8fc79793
- https://git.kernel.org/stable/c/45abc14ab3f15da7d689f1a8809c1a01240a94d9
- https://git.kernel.org/stable/c/08193e733e5d4790e6c937af86d78793b02709be
- https://git.kernel.org/stable/c/6a3c384393d3f0b41669ed5a2e88744aad9d87c8
- https://git.kernel.org/stable/c/26c183a86ea4dd1f2ff90c6f783649e7f5722a10
- https://git.kernel.org/stable/c/01155ded5d4dad61840a9a3c33ab56778ef1f100
- https://git.kernel.org/stable/c/1554fa522f16ec7c5c342ad33fe734eeb6eb2452
- https://git.kernel.org/stable/c/6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6
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.