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Message-ID: <2024022750-CVE-2021-46932-3a36@gregkh> Date: Tue, 27 Feb 2024 10:48:53 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2021-46932: Input: appletouch - initialize work before device registration Description =========== In the Linux kernel, the following vulnerability has been resolved: Input: appletouch - initialize work before device registration Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device The Linux kernel CVE team has assigned CVE-2021-46932 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.23 with commit 5a6eb676d3bc and fixed in 4.4.298 with commit d2cb2bf39a6d Issue introduced in 2.6.23 with commit 5a6eb676d3bc and fixed in 4.9.296 with commit d1962f263a17 Issue introduced in 2.6.23 with commit 5a6eb676d3bc and fixed in 4.14.261 with commit 292d2ac61fb0 Issue introduced in 2.6.23 with commit 5a6eb676d3bc and fixed in 4.19.224 with commit a02e1404e278 Issue introduced in 2.6.23 with commit 5a6eb676d3bc and fixed in 5.4.170 with commit 975774ea7528 Issue introduced in 2.6.23 with commit 5a6eb676d3bc and fixed in 5.10.90 with commit 9f329d0d6c91 Issue introduced in 2.6.23 with commit 5a6eb676d3bc and fixed in 5.15.13 with commit e79ff8c68acb Issue introduced in 2.6.23 with commit 5a6eb676d3bc and fixed in 5.16 with commit 9f3ccdc3f6ef Please see https://www.kernel.org or 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-2021-46932 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/input/mouse/appletouch.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/d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 https://git.kernel.org/stable/c/d1962f263a176f493400b8f91bfbf2bfedce951e https://git.kernel.org/stable/c/292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f https://git.kernel.org/stable/c/a02e1404e27855089d2b0a0acc4652c2ce65fe46 https://git.kernel.org/stable/c/975774ea7528b489930b76a77ffc4d5379b95ff2 https://git.kernel.org/stable/c/9f329d0d6c91142cf0ad08d23c72dd195db2633c https://git.kernel.org/stable/c/e79ff8c68acb1eddf709d3ac84716868f2a91012 https://git.kernel.org/stable/c/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0
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