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

wifi: cfg80211: check IP header size in cfg80211_classify8021d()

A frame that looks like IP can be transmitted, but be too short, so
the DS field is read incorrectly:

BUG: KMSAN: uninit-value in cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027
cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027
ieee80211_select_queue+0x37a/0x9e0 net/mac80211/wme.c:180
__ieee80211_subif_start_xmit+0x60f/0x1d90 net/mac80211/tx.c:4304
ieee80211_subif_start_xmit+0xa8/0x6d0 net/mac80211/tx.c:4538
...
packet_sendmsg+0x9173/0xa2a0 net/packet/af_packet.c:3108

Use skb_header_pointer() like the MPLS case.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00184.

Key SSVC decision points have not yet been added.

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/12c0abd4d1c1b04a7663d04ba85268bc9ad9c017 cve-icon cve-icon
https://git.kernel.org/stable/c/18d5547327c202cda33ad2bbd203220c2c62c8a7 cve-icon cve-icon
https://git.kernel.org/stable/c/3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734 cve-icon cve-icon
https://git.kernel.org/stable/c/48b2c5c628b09cf36cbeca53e0432fc2a7518be7 cve-icon cve-icon
https://git.kernel.org/stable/c/65893c8d28f239c7ddad5a83683be193a9133e9b cve-icon cve-icon
https://git.kernel.org/stable/c/a2cdb4a675ca04c4ac8cc962848082d8ce065008 cve-icon cve-icon
https://git.kernel.org/stable/c/c4fbcf1e614ef0755fcc751fdfca21b0bf4e0ef7 cve-icon cve-icon
https://git.kernel.org/stable/c/f33ad4e2f846e55cf4637419268f093ac9f1a765 cve-icon cve-icon
History

Tue, 06 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-457

Tue, 06 Oct 2026 09:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: check IP header size in cfg80211_classify8021d() A frame that looks like IP can be transmitted, but be too short, so the DS field is read incorrectly: BUG: KMSAN: uninit-value in cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027 cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027 ieee80211_select_queue+0x37a/0x9e0 net/mac80211/wme.c:180 __ieee80211_subif_start_xmit+0x60f/0x1d90 net/mac80211/tx.c:4304 ieee80211_subif_start_xmit+0xa8/0x6d0 net/mac80211/tx.c:4538 ... packet_sendmsg+0x9173/0xa2a0 net/packet/af_packet.c:3108 Use skb_header_pointer() like the MPLS case.
Title wifi: cfg80211: check IP header size in cfg80211_classify8021d()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-10-06T08:46:34.719Z

Reserved: 2026-09-25T10:25:14.343Z

Link: CVE-2026-98345

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-06T09:18:27.480

Modified: 2026-10-06T09:18:27.480

Link: CVE-2026-98345

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-06T15:15:14Z

Weaknesses