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Message-ID: <2025091549-CVE-2022-50251-c216@gregkh> Date: Mon, 15 Sep 2025 16:01:59 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2022-50251: mmc: vub300: fix return value check of mmc_add_host() From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: mmc: vub300: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, the memory that allocated in mmc_alloc_host() will be leaked and it will lead a kernel crash because of deleting not added device in the remove path. So fix this by checking the return value and goto error path which will call mmc_free_host(), besides, the timer added before mmc_add_host() needs be del. And this patch fixes another missing call mmc_free_host() if usb_control_msg() fails. The Linux kernel CVE team has assigned CVE-2022-50251 to this issue. Affected and fixed versions =========================== Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 4.9.337 with commit 41ed46bdbd2878cd6567abe0974a445f8b1b8ec8 Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 4.14.303 with commit 25f05d762ca5e1c685002a53dd44f68e78ca3feb Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 4.19.270 with commit a46e681151bbdacdf6b89ee8c4e5bad0555142bb Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 5.4.229 with commit 3b29f8769d32016b2d89183db4d80c7a71b7e35e Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 5.10.163 with commit 3049a3b927a40d89d4582ff1033cd7953be773c7 Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 5.15.86 with commit afc898019e7bf18c5eb7a0ac19852fcb1b341b3c Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 6.0.16 with commit c9e85979b59cb86f0a15defa8199d740e2b36b90 Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 6.1.2 with commit 2044b2ea77945f372ef161d1bbf814e471767ff2 Issue introduced in 3.0 with commit 88095e7b473a3d9ec3b9c60429576e9cbd327c89 and fixed in 6.2 with commit 0613ad2401f88bdeae5594c30afe318e93b14676 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-2022-50251 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/mmc/host/vub300.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/41ed46bdbd2878cd6567abe0974a445f8b1b8ec8 https://git.kernel.org/stable/c/25f05d762ca5e1c685002a53dd44f68e78ca3feb https://git.kernel.org/stable/c/a46e681151bbdacdf6b89ee8c4e5bad0555142bb https://git.kernel.org/stable/c/3b29f8769d32016b2d89183db4d80c7a71b7e35e https://git.kernel.org/stable/c/3049a3b927a40d89d4582ff1033cd7953be773c7 https://git.kernel.org/stable/c/afc898019e7bf18c5eb7a0ac19852fcb1b341b3c https://git.kernel.org/stable/c/c9e85979b59cb86f0a15defa8199d740e2b36b90 https://git.kernel.org/stable/c/2044b2ea77945f372ef161d1bbf814e471767ff2 https://git.kernel.org/stable/c/0613ad2401f88bdeae5594c30afe318e93b14676
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