From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77B3A3CBE8F for ; Sun, 18 Oct 2026 16:20:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792340448; cv=none; b=HhWvWxZvl6cWm4wdoBreBFusn8E5+jQN35L6lk1iLztr/4XeeAVIcJb3C9SiJCtZK4LuBU1KxxC8ln15GWDIOXeFtb2jYWmJbrxwqez9lcPcTClVsrXSE5IBtMw5w5emGx5CHl5VLJ8yWYK9aSZHKj300mTzFytr6th18097+5E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792340448; c=relaxed/simple; bh=2gnw17AOPVZGDDp93qV9oRMjEkt33RyU2PWEUsQposI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=sQq7RcrKlzl2pDLhbTwRRSIq39LoDGANLRLVtzwzQ2APoEcDQy8I4Algc8nHOi7Q2X1yRVaS6ZmAwcIZ7QfOYfG47vArho6lpA15WzR/Hft4/1oQLZIcLCgZeSAxzzjnm5CFCzEUvladEevUssDmpQeTqdbI2m9aCA/v1HXWrws= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WlWiklYu; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="WlWiklYu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C8D7A1F000C4; Sun, 18 Oct 2026 16:20:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792340447; bh=MZVJhCfaFynZi27oVbWn4Sk/itCSw4hPNGYoDx8dSK4=; h=From:To:Cc:Subject:Date:Reply-To; b=WlWiklYuVtV//RzWeXHCngZshI+yQbQDuaggYGTcsuYFwmn5r+gzvKuD4BJ5Uxy0a UerCxb02DNpnlJw0T8hkKc5iWfTTzodBEvmSyUOu5kN330TyUe5QjKU/BlSFe701KC 9II6NN/fPcB4gPBTH22es4Ul/qRi8xlfkHh+5KMs= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-98823: wifi: cfg80211: preserve hidden-group beacon IE ownership Date: Sun, 18 Oct 2026 17:46:38 +0200 Message-ID: <2026101829-CVE-2026-98823-d2fa@gregkh> X-Mailer: git-send-email 2.56.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2917; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=kLdlt7UOuSJO7U6xo/Mj/mYkHW23JirA8auSttiWsu4=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlXXsbmV4e1arSJP70zdW2rYNTzoPOxDtOa3h877Ws3R /FvWp5eRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAEyk0Z1hvv8a5YUhc61Tkr7b hj4/eOfNht336xjmF1q/ThcS1paerFete6i85qXQqRl1AA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: preserve hidden-group beacon IE ownership A hidden-group probe-response entry borrows its beacon IEs from the group's beacon entry. cfg80211_update_assoc_bss_entry() can pass such an entry to cfg80211_update_known_bss() when merging scan entries after a channel switch. Copying the borrowed beacon_ies into the associated entry gives the same allocation two owners. Releasing the group's beacon entry can then leave the associated entry pointing to freed IEs, which are freed again when that entry is released. Skip beacon IE replacement when the source entry belongs to a hidden group. Preserve probe-response processing, the subsequent metadata updates, and the existing rejection path for conflicting hidden beacon updates. The Linux kernel CVE team has assigned CVE-2026-98823 to this issue. Affected and fixed versions =========================== Issue introduced in 5.4 with commit 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and fixed in 6.12.113 with commit 49b66110a08e4f926f6393e938f226de2750a08b Issue introduced in 5.4 with commit 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and fixed in 6.18.56 with commit dd7973a4130b0862be38d7e08cc0e874b3d99967 Issue introduced in 5.4 with commit 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and fixed in 7.2.10 with commit 5f27581c176f84b52ec0ab9be7b500c10667ef60 Issue introduced in 5.4 with commit 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and fixed in 7.3-rc6 with commit cc45f313d85533d647ce619326302aad6f797c14 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-98823 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/wireless/scan.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/49b66110a08e4f926f6393e938f226de2750a08b https://git.kernel.org/stable/c/dd7973a4130b0862be38d7e08cc0e874b3d99967 https://git.kernel.org/stable/c/5f27581c176f84b52ec0ab9be7b500c10667ef60 https://git.kernel.org/stable/c/cc45f313d85533d647ce619326302aad6f797c14