CVE-2026-98887 - Vulnerability Details

- wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO

Description

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO

hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload
to a struct hwsim_tx_rate * and unconditionally reads
IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds
the attribute from above (NLA_BINARY .len is a maximum) and the op sets
GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is
accepted and the loop reads past the payload.

Require the exact length in the policy, so a malformed attribute is
rejected before the handler runs.

Published: 2026-10-23

Score: n/a

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 3a96bb65b4b820d8b41fa155781ec1c29e3479d4
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 59e1f2a0242232b4a3af144ae317d3913fc09046
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 1ae85bb34fe3510659b86d6a5f8036dd498233f8
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< b5b1234bbfa25537fb9a5c0d62c328ed4547f721
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 3dc723ac78a6e4fa0fd49e27e487ed319da40a9f
`0`	affected	< 5.10.271
`0`	affected	< 5.15.222
`0`	affected	< 6.1.189
`0`	affected	< 6.6.158
`0`	affected	< 6.12.111
`0`	affected	< 6.18.53

Linux

affected

Version	Status	Constraints
`5.10.271`	unaffected	≤ 5.10.*
`5.15.222`	unaffected	≤ 5.15.*
`6.1.189`	unaffected	≤ 6.1.*
`6.6.158`	unaffected	≤ 6.6.*
`6.12.111`	unaffected	≤ 6.12.*
`6.18.53`	unaffected	≤ 6.18.*
`7.2`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

100%

Version	Status	Scheme	Platform
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3a96bb65b4b820d8b41fa155781ec1c29e3479d4)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,59e1f2a0242232b4a3af144ae317d3913fc09046)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1ae85bb34fe3510659b86d6a5f8036dd498233f8)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b5b1234bbfa25537fb9a5c0d62c328ed4547f721)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3dc723ac78a6e4fa0fd49e27e487ed319da40a9f)`	affected	code_commit	—
`[0,5.10.271)`	affected	semver	—
`[0,5.15.222)`	affected	semver	—
`[0,6.1.189)`	affected	semver	—
`[0,6.6.158)`	affected	semver	—
`[0,6.12.111)`	affected	semver	—
`[0,6.18.53)`	affected	semver	—

Linux

100%

Version	Status	Scheme	Platform
`[5.10.271,5.10.*]`	unaffected	generic	—
`[5.15.222,5.15.*]`	unaffected	generic	—
`[6.1.189,6.1.*]`	unaffected	generic	—
`[6.6.158,6.6.*]`	unaffected	generic	—
`[6.12.111,6.12.*]`	unaffected	generic	—
`[6.18.53,6.18.*]`	unaffected	generic	—
`[7.2,*]`	unaffected	generic	—

Linux

Linux Kernel

100%

Version	Status	Scheme	Platform
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3a96bb65b4b820d8b41fa155781ec1c29e3479d4)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,59e1f2a0242232b4a3af144ae317d3913fc09046)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1ae85bb34fe3510659b86d6a5f8036dd498233f8)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b5b1234bbfa25537fb9a5c0d62c328ed4547f721)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3dc723ac78a6e4fa0fd49e27e487ed319da40a9f)`	affected	code_commit	—
`[0,5.10.271)`	affected	semver	—
`[0,5.15.222)`	affected	semver	—
`[0,6.1.189)`	affected	semver	—
`[0,6.6.158)`	affected	semver	—
`[0,6.12.111)`	affected	semver	—
`[0,6.18.53)`	affected	semver	—

Linux

Linux Kernel

100%

Version	Status	Scheme	Platform
`[5.10.271,5.10.*]`	unaffected	generic	—
`[5.15.222,5.15.*]`	unaffected	generic	—
`[6.1.189,6.1.*]`	unaffected	generic	—
`[6.6.158,6.6.*]`	unaffected	generic	—
`[6.12.111,6.12.*]`	unaffected	generic	—
`[6.18.53,6.18.*]`	unaffected	generic	—
`[7.2,*]`	unaffected	generic	—

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Remediation

No remediation available yet.

Tracking

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Advisories

No advisories yet.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7
https://git.kernel.org/stable/c/1ae85bb34fe3510659b86d6a5f8036dd498233f8
https://git.kernel.org/stable/c/3a96bb65b4b820d8b41fa155781ec1c29e3479d4
https://git.kernel.org/stable/c/3dc723ac78a6e4fa0fd49e27e487ed319da40a9f
https://git.kernel.org/stable/c/59e1f2a0242232b4a3af144ae317d3913fc09046
https://git.kernel.org/stable/c/6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695
https://git.kernel.org/stable/c/b5b1234bbfa25537fb9a5c0d62c328ed4547f721

History

Fri, 23 Oct 2026 14:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Linux linux
Vendors & Products		Linux linux

Fri, 23 Oct 2026 12:00:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload to a struct hwsim_tx_rate * and unconditionally reads IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds the attribute from above (NLA_BINARY .len is a maximum) and the op sets GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is accepted and the loop reads past the payload. Require the exact length in the policy, so a malformed attribute is rejected before the handler runs.
Title		wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7 https://git.kernel.org/stable/c/1ae85bb34fe3510659b86d6a5f8036dd498233f8 https://git.kernel.org/stable/c/3a96bb65b4b820d8b41fa155781ec1c29e3479d4 https://git.kernel.org/stable/c/3dc723ac78a6e4fa0fd49e27e487ed319da40a9f https://git.kernel.org/stable/c/59e1f2a0242232b4a3af144ae317d3913fc09046 https://git.kernel.org/stable/c/6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695 https://git.kernel.org/stable/c/b5b1234bbfa25537fb9a5c0d62c328ed4547f721

Subscriptions

Linux Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-10-23T11:37:44.605Z

Updated: 2026-10-23T11:37:44.605Z

Reserved: 2026-09-25T10:25:14.378Z

Link: CVE-2026-98887

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-10-23T12:18:22.460

Modified: 2026-10-23T12:18:22.460

Link: CVE-2026-98887

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-10-23T14:15:06Z

Weaknesses

No weakness.

Tracking

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