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CVE-2026-98349— wifi: libipw: reject too-short beacon and probe responses

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.

在 Linux 内核中，已修复以下漏洞： wifi: libipw: 拒绝过短的 Beacon 和 Probe 响应帧 及其调用的 假设接收到的帧包含完整的 36 字节 Beacon 和 Probe 响应前缀。然而， 和 的接收路径仅确认管理帧携带了通用的 24 字节三地址头（three-address header）。 随后， 通过以下公式计算信息元素（Information Element）的长度： 其中， 是 类型，而 返回的类型为 。因此，该减法操作会按照 （无符号长整型）进行计算，导致发生回绕（wrap-

CVSS 7.1 · High EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux b453872c35cfcbdbf5a794737817f7d4e7b1b579< cee6f141b3bebe62eb0363fd147acb52023935f0 affected
b453872c35cfcbdbf5a794737817f7d4e7b1b579< 23afeb5d2bdfd34c8a0a661876291a4fa9978293 affected
b453872c35cfcbdbf5a794737817f7d4e7b1b579< 89959ff00a978f3172726d3d5f861ee6f1aae26d affected
b453872c35cfcbdbf5a794737817f7d4e7b1b579< 14ae269c1306053ddf1ccf37c4bd66e085a652d1 affected
b453872c35cfcbdbf5a794737817f7d4e7b1b579< ff756e6647722b7d225d882f7bdb186d8eee318e affected
b453872c35cfcbdbf5a794737817f7d4e7b1b579< 2c87bbc00dc93149d1dc4f803ad92d92e4ef3758 affected
b453872c35cfcbdbf5a794737817f7d4e7b1b579< 19959fb60228f6dccc40d55507f8b1a751c2dc89 affected
b453872c35cfcbdbf5a794737817f7d4e7b1b579< 5ce5721e8cbe3e80db8f43851cc2a2a92485ef4b affected
… +10 more rows
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I. Basic Information for CVE-2026-98349

Vulnerability Information
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Vulnerability Title
wifi: libipw: reject too-short beacon and probe responses
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b453872c35cfcbdbf5a794737817f7d4e7b1b579 ~ cee6f141b3bebe62eb0363fd147acb52023935f0 -
Linux Linux 2.6.14 -

II. Public POCs for CVE-2026-98349

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III. Intelligence Information for CVE-2026-98349

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Patches & Fixes for CVE-2026-98349 (7)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98281 7.8 HIGH futex: Also allocate private hash on vfork()
CVE-2026-98324 7.8 HIGH dmaengine: pxa: fix double counting of the hw descriptors
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()
CVE-2026-98256 7.8 HIGH signal: Prevent exec() race
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98349

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