CVE-2026-98349 is a vulnerability in Linux Kernel
Published on October 6, 2026
wifi: libipw: reject too-short beacon and probe responses
In the Linux kernel, the following vulnerability has been resolved:
wifi: libipw: reject too-short beacon and probe responses
libipw_process_probe_response() and the libipw_network_init() call it
makes assume the frame contains the full 36-byte beacon and probe
response prefix, but the ipw2100 and ipw2200 receive paths only
establish that a management frame carries the generic 24-byte
three-address header.
libipw_network_init() then computes the information element length as
stats->len - sizeof(*beacon)
stats->len is a u16 and sizeof() has type size_t, so the subtraction is
evaluated as size_t and wraps instead of going negative. Truncating
that to the u16 length parameter of libipw_parse_info_param() yields
65524 for a 24-byte beacon, and the parser then walks the receive
buffer as if it held almost 64 KiB of information elements, reading
past the allocation.
Reject the frame before any fixed field is touched.
Found by an AI-assisted review of length arithmetic in management frame
parsers. Verified with a KUnit case under Generic KASAN on arm64 under
QEMU; I do not have the hardware, so it is not tested on a real device.
Products Associated with CVE-2026-98349
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Affected Versions
Linux:- Version b453872c35cfcbdbf5a794737817f7d4e7b1b579 and below cee6f141b3bebe62eb0363fd147acb52023935f0 is affected.
- Version b453872c35cfcbdbf5a794737817f7d4e7b1b579 and below 23afeb5d2bdfd34c8a0a661876291a4fa9978293 is affected.
- Version b453872c35cfcbdbf5a794737817f7d4e7b1b579 and below 89959ff00a978f3172726d3d5f861ee6f1aae26d is affected.
- Version b453872c35cfcbdbf5a794737817f7d4e7b1b579 and below 14ae269c1306053ddf1ccf37c4bd66e085a652d1 is affected.
- Version b453872c35cfcbdbf5a794737817f7d4e7b1b579 and below ff756e6647722b7d225d882f7bdb186d8eee318e is affected.
- Version b453872c35cfcbdbf5a794737817f7d4e7b1b579 and below 2c87bbc00dc93149d1dc4f803ad92d92e4ef3758 is affected.
- Version b453872c35cfcbdbf5a794737817f7d4e7b1b579 and below 19959fb60228f6dccc40d55507f8b1a751c2dc89 is affected.
- Version b453872c35cfcbdbf5a794737817f7d4e7b1b579 and below 5ce5721e8cbe3e80db8f43851cc2a2a92485ef4b is affected.
- Version 2.6.14 is affected.
- Before 2.6.14 is unaffected.
- Version 5.10.271, <= 5.10.* is unaffected.
- Version 5.15.222, <= 5.15.* is unaffected.
- Version 6.1.189, <= 6.1.* is unaffected.
- Version 6.6.158, <= 6.6.* is unaffected.
- Version 6.12.112, <= 6.12.* is unaffected.
- Version 6.18.54, <= 6.18.* is unaffected.
- Version 7.2.8, <= 7.2.* is unaffected.
- Version 7.3-rc4, <= * is unaffected.