CVE-2026-98190: Linux Vulnerability

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix out-of-bounds read in P2P public action frames wilc_wfi_p2p_rx() and mgmt_tx() start parsing a frame once ieee80211_is_public_action() returns true. That helper only verifies the frame is long enough for the action category field, that is offsetofend(struct ieee80211_mgmt, u.action.category), 25 bytes. Both functions then read the P2P public action header up to oui_subtype at offset 30 and pass "size - ie_offset" to cfg80211_find_vendor_ie(), where ie_offset is offsetof(struct ieee80211_mgmt, u) + sizeof(*d), i.e. 32. A public action frame of 25 to 31 bytes passes the check but is shorter than that 32 byte header, so oui_subtype can be read out of bounds, and because the length is unsigned, "size - ie_offset" underflows to a value close to 4 GiB. cfg80211_find_vendor_ie() takes an unsigned int length, so even the size_t subtraction in mgmt_tx() is truncated to the same value. It then walks far past the buffer searching for a vendor element until it reaches unmapped memory. In the receive path the frame arrives over the air and needs no association, so a nearby unauthenticated device can crash the host while it is in P2P listen. Reject frames shorter than the P2P public action header in both paths before dereferencing it.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

Vendor	Product	Versions
Linux	Linux	>= 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, < e98ad9f4c59f2e836f8d971b57763a4277680422; >= 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, < f0c46f8111a479b97b8ab17747c528cade6257f1; >= 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, < a5b827dad8a3037cef04d0240d1c2acb1557101e; >= 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, < 491df93b10d76aebaf6aa4bb05a6ba897f4fccfb; >= 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, < cc2ee642ebeac8699b671ddb6d5955a785e5ff43; >= 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, < 68b786691ce24c5c94e28811db243e573c50f9c1; >= 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, < 6fbe76eb2796d2aee45cc6a2dd16e85d3cc96304; >= 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, < ba6cb7c0868a412c2eb68e8efd5aa38bfb258a14
Linux	Linux	5.7

References

Timeline

Published: Oct 6, 2026
Last Modified: Oct 6, 2026
Status: Received

Frequently Asked Questions

What is CVE-2026-98190?

In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix out-of-bounds read in P2P public action frames wilc_wfi_p2p_rx() and mgmt_tx() start parsing a frame once ieee80211_is_public_action() returns true. That helper only verifies the frame is long enough for the action category field, that is offsetofend(struct ieee80211_mgmt, u.action.category), 25 bytes. Both functions then read the P2P public action header up to oui_subtype at offset 30 and pass "size - ie_offset" to cfg80211_find_vendor_ie(), where ie_offset is offsetof(struct ieee80211_mgmt, u) + sizeof(*d), i.e. 32. A public action frame of 25 to 31 bytes passes the check but is shorter than that 32 byte header, so oui_subtype can be read out of bounds, and because the length is unsigned, "size - ie_offset" underflows to a value close to 4 GiB. cfg80211_find_vendor_ie() takes an unsigned int length, so even the size_t subtraction in mgmt_tx() is truncated to the same value. It then walks far past the buffer searching for a vendor element until it reaches unmapped memory. In the receive path the frame arrives over the air and needs no association, so a nearby unauthenticated device can crash the host while it is in P2P listen. Reject frames shorter than the P2P public action header in both paths before dereferencing it.

How severe is CVE-2026-98190?

Severity scoring for CVE-2026-98190 is pending analysis.

How do I fix CVE-2026-98190?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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