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Message-ID: <2025120946-CVE-2022-50670-feb4@gregkh> Date: Tue, 9 Dec 2025 10:30:55 +0900 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2022-50670: mmc: omap_hsmmc: 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: omap_hsmmc: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, it will lead two issues: 1. The memory that allocated in mmc_alloc_host() is leaked. 2. In the remove() path, mmc_remove_host() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in device_del(). Fix this by checking the return value and goto error path wihch will call mmc_free_host(). The Linux kernel CVE team has assigned CVE-2022-50670 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.29 with commit a45c6cb816474cefe56059fce422a9bdcd77e0dc and fixed in 5.4.229 with commit f153c9e15f8961bdf38707853e15b42ea7c691d9 Issue introduced in 2.6.29 with commit a45c6cb816474cefe56059fce422a9bdcd77e0dc and fixed in 5.10.163 with commit fb3d596267a98813a7a8206097d8d46c98505a0d Issue introduced in 2.6.29 with commit a45c6cb816474cefe56059fce422a9bdcd77e0dc and fixed in 5.15.86 with commit 62005dfcc396424db3337a1dc3ab49623537f5e5 Issue introduced in 2.6.29 with commit a45c6cb816474cefe56059fce422a9bdcd77e0dc and fixed in 6.0.16 with commit a5f8a4583280a76e50329b910e91ef1dea1e6c79 Issue introduced in 2.6.29 with commit a45c6cb816474cefe56059fce422a9bdcd77e0dc and fixed in 6.1.2 with commit 4e1dc24bcfc8257f24c0663badec7e4f3ae80558 Issue introduced in 2.6.29 with commit a45c6cb816474cefe56059fce422a9bdcd77e0dc and fixed in 6.2 with commit a525cad241c339ca00bf7ebf03c5180f2a9b767c 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-2022-50670 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/omap_hsmmc.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/f153c9e15f8961bdf38707853e15b42ea7c691d9 https://git.kernel.org/stable/c/fb3d596267a98813a7a8206097d8d46c98505a0d https://git.kernel.org/stable/c/62005dfcc396424db3337a1dc3ab49623537f5e5 https://git.kernel.org/stable/c/a5f8a4583280a76e50329b910e91ef1dea1e6c79 https://git.kernel.org/stable/c/4e1dc24bcfc8257f24c0663badec7e4f3ae80558 https://git.kernel.org/stable/c/a525cad241c339ca00bf7ebf03c5180f2a9b767c
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