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Message-ID: <20240318101458.2835626-9-lee@kernel.org> Date: Mon, 18 Mar 2024 10:14:59 +0000 From: Lee Jones <lee@...nel.org> To: linux-cve-announce@...r.kernel.org Cc: Lee Jones <lee@...nel.org> Subject: CVE-2023-52614: PM / devfreq: Fix buffer overflow in trans_stat_show Description =========== In the Linux kernel, the following vulnerability has been resolved: PM / devfreq: Fix buffer overflow in trans_stat_show Fix buffer overflow in trans_stat_show(). Convert simple snprintf to the more secure scnprintf with size of PAGE_SIZE. Add condition checking if we are exceeding PAGE_SIZE and exit early from loop. Also add at the end a warning that we exceeded PAGE_SIZE and that stats is disabled. Return -EFBIG in the case where we don't have enough space to write the full transition table. Also document in the ABI that this function can return -EFBIG error. The Linux kernel CVE team has assigned CVE-2023-52614 to this issue. Affected and fixed versions =========================== Issue introduced in 3.8 with commit e552bbaf5b98 and fixed in 5.15.149 with commit 796d3fad8c35 Issue introduced in 3.8 with commit e552bbaf5b98 and fixed in 6.1.76 with commit 8a7729cda2dd Issue introduced in 3.8 with commit e552bbaf5b98 and fixed in 6.6.15 with commit a979f56aa4b9 Issue introduced in 3.8 with commit e552bbaf5b98 and fixed in 6.7.3 with commit eaef4650fa20 Issue introduced in 3.8 with commit e552bbaf5b98 and fixed in 6.8 with commit 08e23d05fa6d 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-2023-52614 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: Documentation/ABI/testing/sysfs-class-devfreq drivers/devfreq/devfreq.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/796d3fad8c35ee9df9027899fb90ceaeb41b958f https://git.kernel.org/stable/c/8a7729cda2dd276d7a3994638038fb89035b6f2c https://git.kernel.org/stable/c/a979f56aa4b93579cf0e4265ae04d7e9300fd3e8 https://git.kernel.org/stable/c/eaef4650fa2050147ca25fd7ee43bc0082e03c87 https://git.kernel.org/stable/c/08e23d05fa6dc4fc13da0ccf09defdd4bbc92ff4
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