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Message-ID: <2024022920-CVE-2021-47020-78d9@gregkh> Date: Thu, 29 Feb 2024 23:31:19 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2021-47020: soundwire: stream: fix memory leak in stream config error path Description =========== In the Linux kernel, the following vulnerability has been resolved: soundwire: stream: fix memory leak in stream config error path When stream config is failed, master runtime will release all slave runtime in the slave_rt_list, but slave runtime is not added to the list at this time. This patch frees slave runtime in the config error path to fix the memory leak. The Linux kernel CVE team has assigned CVE-2021-47020 to this issue. Affected and fixed versions =========================== Issue introduced in 4.18 with commit 89e590535f32 and fixed in 4.19.191 with commit 342260fe8210 Issue introduced in 4.18 with commit 89e590535f32 and fixed in 5.4.119 with commit 870533403ffa Issue introduced in 4.18 with commit 89e590535f32 and fixed in 5.10.37 with commit 7c468deae306 Issue introduced in 4.18 with commit 89e590535f32 and fixed in 5.11.21 with commit 2f17ac005b32 Issue introduced in 4.18 with commit 89e590535f32 and fixed in 5.12.4 with commit effd2bd62b41 Issue introduced in 4.18 with commit 89e590535f32 and fixed in 5.13 with commit 48f17f96a817 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-2021-47020 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/soundwire/stream.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/342260fe821047c3d515e3d28085d73fbdce3e80 https://git.kernel.org/stable/c/870533403ffa28ff63e173045fc5369365642002 https://git.kernel.org/stable/c/7c468deae306d0cbbd539408c26cfec04c66159a https://git.kernel.org/stable/c/2f17ac005b320c85d686088cfd4c2e7017912b88 https://git.kernel.org/stable/c/effd2bd62b416f6629e18e3ce077c60de14cfdea https://git.kernel.org/stable/c/48f17f96a81763c7c8bf5500460a359b9939359f
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