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Date: Thu, 4 Apr 2024 10:23:08 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-26791: btrfs: dev-replace: properly validate device names Description =========== In the Linux kernel, the following vulnerability has been resolved: btrfs: dev-replace: properly validate device names There's a syzbot report that device name buffers passed to device replace are not properly checked for string termination which could lead to a read out of bounds in getname_kernel(). Add a helper that validates both source and target device name buffers. For devid as the source initialize the buffer to empty string in case something tries to read it later. This was originally analyzed and fixed in a different way by Edward Adam Davis (see links). The Linux kernel CVE team has assigned CVE-2024-26791 to this issue. Affected and fixed versions =========================== Fixed in 4.19.309 with commit 11d7a2e429c0 Fixed in 5.4.271 with commit c6652e20d7d7 Fixed in 5.10.212 with commit 2886fe308a83 Fixed in 5.15.151 with commit ab2d68655d0f Fixed in 6.1.81 with commit f590040ce2b7 Fixed in 6.6.21 with commit b1690ced4d2d Fixed in 6.7.9 with commit 343eecb4ff49 Fixed in 6.8 with commit 9845664b9ee4 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-2024-26791 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: fs/btrfs/dev-replace.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/11d7a2e429c02d51e2dc90713823ea8b8d3d3a84 https://git.kernel.org/stable/c/c6652e20d7d783d060fe5f987eac7b5cabe31311 https://git.kernel.org/stable/c/2886fe308a83968dde252302884a1e63351cf16d https://git.kernel.org/stable/c/ab2d68655d0f04650bef09fee948ff80597c5fb9 https://git.kernel.org/stable/c/f590040ce2b712177306b03c2a63b16f7d48d3c8 https://git.kernel.org/stable/c/b1690ced4d2d8b28868811fb81cd33eee5aefee1 https://git.kernel.org/stable/c/343eecb4ff49a7b1cc1dfe86958a805cf2341cfb https://git.kernel.org/stable/c/9845664b9ee47ce7ee7ea93caf47d39a9d4552c4
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