wifi: libipw: reject too-short beacon and probe responses

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98349
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:28 UTC
Updated2026-10-07 07:17:09 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001720000 probability, percentile 0.059930000 (date 2026-10-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b453872c35cfcbdbf5a794737817f7d4e7b1b579 cee6f141b3bebe62eb0363fd147acb52023935f0 git Not specified
CNA Linux Linux affected b453872c35cfcbdbf5a794737817f7d4e7b1b579 23afeb5d2bdfd34c8a0a661876291a4fa9978293 git Not specified
CNA Linux Linux affected b453872c35cfcbdbf5a794737817f7d4e7b1b579 89959ff00a978f3172726d3d5f861ee6f1aae26d git Not specified
CNA Linux Linux affected b453872c35cfcbdbf5a794737817f7d4e7b1b579 14ae269c1306053ddf1ccf37c4bd66e085a652d1 git Not specified
CNA Linux Linux affected b453872c35cfcbdbf5a794737817f7d4e7b1b579 ff756e6647722b7d225d882f7bdb186d8eee318e git Not specified
CNA Linux Linux affected b453872c35cfcbdbf5a794737817f7d4e7b1b579 2c87bbc00dc93149d1dc4f803ad92d92e4ef3758 git Not specified
CNA Linux Linux affected b453872c35cfcbdbf5a794737817f7d4e7b1b579 19959fb60228f6dccc40d55507f8b1a751c2dc89 git Not specified
CNA Linux Linux affected b453872c35cfcbdbf5a794737817f7d4e7b1b579 5ce5721e8cbe3e80db8f43851cc2a2a92485ef4b git Not specified
CNA Linux Linux affected 2.6.14 Not specified
CNA Linux Linux unaffected 2.6.14 semver Not specified
CNA Linux Linux unaffected 5.10.271 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.222 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.189 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2c87bbc00dc93149d1dc4f803ad92d92e4ef3758 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cee6f141b3bebe62eb0363fd147acb52023935f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5ce5721e8cbe3e80db8f43851cc2a2a92485ef4b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/23afeb5d2bdfd34c8a0a661876291a4fa9978293 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/89959ff00a978f3172726d3d5f861ee6f1aae26d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/19959fb60228f6dccc40d55507f8b1a751c2dc89 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/14ae269c1306053ddf1ccf37c4bd66e085a652d1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ff756e6647722b7d225d882f7bdb186d8eee318e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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