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Message-ID: <2025091558-CVE-2022-50301-c26c@gregkh> Date: Mon, 15 Sep 2025 16:46:03 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2022-50301: iommu/omap: Fix buffer overflow in debugfs From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: iommu/omap: Fix buffer overflow in debugfs There are two issues here: 1) The "len" variable needs to be checked before the very first write. Otherwise if omap2_iommu_dump_ctx() with "bytes" less than 32 it is a buffer overflow. 2) The snprintf() function returns the number of bytes that *would* have been copied if there were enough space. But we want to know the number of bytes which were *actually* copied so use scnprintf() instead. The Linux kernel CVE team has assigned CVE-2022-50301 to this issue. Affected and fixed versions =========================== Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 4.9.331 with commit 706e359cf046c142db290244c3f4938b20fbe805 Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 4.14.296 with commit ec53b99b6b9da8b501f001595a6260c03b42d5b7 Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 4.19.262 with commit 648472df221f2bbffb433b964bcb87baccc586d8 Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 5.4.220 with commit 4010a1afaae1c0fb9c2cac5de703bed29b1f1782 Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 5.10.150 with commit 2fee0dbfaeaaa4bda04279ce772c4572b1429d04 Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 5.15.75 with commit 0c7043a5b5c3b35f5dc8875757f71e7f491d64d4 Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 5.19.17 with commit bd0438f534b2e31b12f0b39b355c5dc2bbdaf854 Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 6.0.3 with commit 9814cc350e0765ce69244bf55ae4c8b29facd27e Issue introduced in 3.19 with commit bd4396f09a4a9e77423e92ec9448217ab46f6edf and fixed in 6.1 with commit 184233a5202786b20220acd2d04ddf909ef18f29 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-2022-50301 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/iommu/omap-iommu-debug.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/706e359cf046c142db290244c3f4938b20fbe805 https://git.kernel.org/stable/c/ec53b99b6b9da8b501f001595a6260c03b42d5b7 https://git.kernel.org/stable/c/648472df221f2bbffb433b964bcb87baccc586d8 https://git.kernel.org/stable/c/4010a1afaae1c0fb9c2cac5de703bed29b1f1782 https://git.kernel.org/stable/c/2fee0dbfaeaaa4bda04279ce772c4572b1429d04 https://git.kernel.org/stable/c/0c7043a5b5c3b35f5dc8875757f71e7f491d64d4 https://git.kernel.org/stable/c/bd0438f534b2e31b12f0b39b355c5dc2bbdaf854 https://git.kernel.org/stable/c/9814cc350e0765ce69244bf55ae4c8b29facd27e https://git.kernel.org/stable/c/184233a5202786b20220acd2d04ddf909ef18f29
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