CVE-2026-74410
wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer
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.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 15, 2026, 6:22 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74410
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Add bounds checking for RX descriptor length.
- Ensure new_len does not exceed DMA buffer size.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74410.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74410 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74410
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74410 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74410 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'e3037485c68ec1a299ff41160d8fedbd4abc29b9', 'lessThan': '913bd7d3d3d842b5c1d2b908a0201efa8fc79793', 'versionType': 'git'}, {'status': 'affected', 'version': 'e3037485c68ec1a299ff41160d8fedbd4abc29b9', 'lessThan': '45abc14ab3f15da7d689f1a8809c1a01240a94d9', 'versionType': 'git'}, {'status': 'affected', 'version': 'e3037485c68ec1a299ff41160d8fedbd4abc29b9', 'lessThan': '08193e733e5d4790e6c937af86d78793b02709be', 'versionType': 'git'}, {'status': 'affected', 'version': 'e3037485c68ec1a299ff41160d8fedbd4abc29b9', 'lessThan': '6a3c384393d3f0b41669ed5a2e88744aad9d87c8', 'versionType': 'git'}, {'status': 'affected', 'version': 'e3037485c68ec1a299ff41160d8fedbd4abc29b9', 'lessThan': '26c183a86ea4dd1f2ff90c6f783649e7f5722a10', 'versionType': 'git'}, {'status': 'affected', 'version': 'e3037485c68ec1a299ff41160d8fedbd4abc29b9', 'lessThan': '01155ded5d4dad61840a9a3c33ab56778ef1f100', 'versionType': 'git'}, {'status': 'affected', 'version': 'e3037485c68ec1a299ff41160d8fedbd4abc29b9', 'lessThan': '1554fa522f16ec7c5c342ad33fe734eeb6eb2452', 'versionType': 'git'}, {'status': 'affected', 'version': 'e3037485c68ec1a299ff41160d8fedbd4abc29b9', 'lessThan': '6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6', 'versionType': 'git'}], 'programFiles': ['drivers/net/wireless/realtek/rtw88/pci.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/realtek/rtw88/pci.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/01155ded5d4dad61840a9a3c33ab56778ef1f100 Added Reference https://git.kernel.org/stable/c/08193e733e5d4790e6c937af86d78793b02709be Added Reference https://git.kernel.org/stable/c/1554fa522f16ec7c5c342ad33fe734eeb6eb2452 Added Reference https://git.kernel.org/stable/c/26c183a86ea4dd1f2ff90c6f783649e7f5722a10 Added Reference https://git.kernel.org/stable/c/45abc14ab3f15da7d689f1a8809c1a01240a94d9 Added Reference https://git.kernel.org/stable/c/6a3c384393d3f0b41669ed5a2e88744aad9d87c8 Added Reference https://git.kernel.org/stable/c/6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6 Added Reference https://git.kernel.org/stable/c/913bd7d3d3d842b5c1d2b908a0201efa8fc79793