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 494B057EDA6 for ; Wed, 9 Sep 2026 16:13:35 +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=1788970416; cv=none; b=WrXgrs0D2v0RQKRUFWXCavCXcvUZnDwM0lODv4L5CkhALyrCRlAq1PlRg7K3GsurLMMXYTuDncrq43lRfkcwTzl4jnA/fG8b7pz5oyUIQ8i5Ti6yPDWRWJM7wzad/lgrP6RjJehvHx8XuGXwL4A1Gah802fn+vL5Y9vPJZOvOgA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788970416; c=relaxed/simple; bh=SwW4F2evwO4tZnw18rH+0Co4i1DZgiI97OSxGJc0bZk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=oVvzPrLYTvWVMkJbvydVShYEPEx1pr6oe4UfNn+N/bJEyGPBrO0ebz1tnIeHVMeITQ2JI60einASqTcXIZ7ACNsMYFJoosocDhmyuhqhljlxlnnqcDRWE42Si4PMQnVA4Um/0Kc0NTHAJXI/aCfJw+poxklqM4bzqR2AeIe8Zw4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=SQWa0CAM; 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="SQWa0CAM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D04C1F00A3A; Wed, 9 Sep 2026 16:13:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788970415; bh=MhAbWBjVoHQTAboaOOVdjQ2/fcZTjBdnYHbwSM7oHbo=; h=From:To:Cc:Subject:Date:Reply-To; b=SQWa0CAMmgWIKfQ4uJLDVdz8P99UWByq6gn3K/4PTklABvf2mhlrxjpdw5LZe/LKM KqLvopHx83qYSWHzmYwGCJZsfwSevTN0pysvgpkC8uqKkaVb8WxdSI6Uzv0HEyCO1n 0ZTnrkg3RxzrQX8pUNWjC9K4XRXmuh709ao1x0Uo= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-80918: HID: core: fix number/pointer type confusion on long items Date: Wed, 9 Sep 2026 18:13:18 +0200 Message-ID: <2026090915-CVE-2026-80918-41ce@gregkh> X-Mailer: git-send-email 2.55.0 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=4458; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=jR2GB2IUpQcGjZBWfyybVPjM4zZde3NOEkVvvsvR8dM=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkLW2dPFvfcvD9ln/j3R4sepZms2eE6c/4irov3Fkqdd 375be91ho5YFgZBJgZZMUWWL9t4ju6vOKToZWh7GmYOKxPIEAYuTgGYyKM/DPOjRAy507JYM68o zfJ77KBrW1bPE8AwV7DXcdHnF2/dErg+HW9qXWFiePmHMgA= 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: HID: core: fix number/pointer type confusion on long items When fetch_item() is called by hid_scan_report() on an item with HID_ITEM_TAG_LONG, it stores a pointer to the item data in item->data.longdata instead of storing a value directly in item->data.{u8/u16/u32}. When item_udata() or item_sdata() encounters such an item, it incorrectly assumes that the item is in short format, and therefore returns the lower part of a kernel pointer reinterpreted as a number. When a HID device is connected whose descriptor contains a HID_GLOBAL_ITEM_TAG_REPORT_SIZE encoded in long format with size=4, this causes the lower half of a kernel pointer to be printed into dmesg as a number, like this: hid (null): invalid report_size 107953555 To fix it, let item_udata() and item_sdata() verify that the item is in short format. Note that this bug only affects hid_scan_report(), while the main parsing pass hid_parse_collections() will always bail out when encountering a long item. Sidenote: There are currently no users of data.longdata; maybe we should just remove any parsing of long-format descriptors as a follow-up. The Linux kernel CVE team has assigned CVE-2026-80918 to this issue. Affected and fixed versions =========================== Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 5.10.267 with commit bed7fe3a936b6bdd84671385951397ca673cf6e7 Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 5.15.218 with commit aec2c2ec87d4ec1f098979f68cd81b29f031c8cb Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 6.1.185 with commit 634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996 Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 6.6.154 with commit abec577de5fc16cd5caae42f97cdcd0983c06d66 Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 6.12.106 with commit dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 6.18.47 with commit 1fa1591efd417e39e5e164bebea8ca7a3837c469 Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 7.1.11 with commit e60159f5ea60254a5c3de4ea4f2f939f0171031b Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 7.2.1 with commit e542edada3f79387c0ac2a528cebf01f4ef47df8 Issue introduced in 3.12 with commit 3dc8fc083dbfeede7b63a0c07581192e97711365 and fixed in 7.3-rc1 with commit 28abce951343fcec26e397610868efa4e1395c3f 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-2026-80918 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: drivers/hid/hid-core.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/bed7fe3a936b6bdd84671385951397ca673cf6e7 https://git.kernel.org/stable/c/aec2c2ec87d4ec1f098979f68cd81b29f031c8cb https://git.kernel.org/stable/c/634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996 https://git.kernel.org/stable/c/abec577de5fc16cd5caae42f97cdcd0983c06d66 https://git.kernel.org/stable/c/dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e https://git.kernel.org/stable/c/1fa1591efd417e39e5e164bebea8ca7a3837c469 https://git.kernel.org/stable/c/e60159f5ea60254a5c3de4ea4f2f939f0171031b https://git.kernel.org/stable/c/e542edada3f79387c0ac2a528cebf01f4ef47df8 https://git.kernel.org/stable/c/28abce951343fcec26e397610868efa4e1395c3f