| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-35936: btrfs: handle chunk tree lookup error in btrfs_relocate_sys_chunks() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| btrfs: handle chunk tree lookup error in btrfs_relocate_sys_chunks() |
| |
| The unhandled case in btrfs_relocate_sys_chunks() loop is a corruption, |
| as it could be caused only by two impossible conditions: |
| |
| - at first the search key is set up to look for a chunk tree item, with |
| offset -1, this is an inexact search and the key->offset will contain |
| the correct offset upon a successful search, a valid chunk tree item |
| cannot have an offset -1 |
| |
| - after first successful search, the found_key corresponds to a chunk |
| item, the offset is decremented by 1 before the next loop, it's |
| impossible to find a chunk item there due to alignment and size |
| constraints |
| |
| The Linux kernel CVE team has assigned CVE-2024-35936 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.312 with commit bebd9e0ff90034875c5dfe4bd514fd7055fc7a89 |
| Fixed in 5.4.274 with commit 576164bd01bd795f8b09fb194b493103506b33c9 |
| Fixed in 5.10.215 with commit 87299cdaae757f3f41212146cfb5b3af416b8385 |
| Fixed in 5.15.155 with commit d1ffa4ae2d591fdd40471074e79954ec45f147f7 |
| Fixed in 6.1.86 with commit 36c2a2863bc3896243eb724dc3fd4cf9aea633f2 |
| Fixed in 6.6.27 with commit 0d23b34c68c46cd225b55868bc8a269e3134816d |
| Fixed in 6.8.6 with commit 1f9212cdbd005bc55f2b7422e7b560d9c02bd1da |
| Fixed in 6.9 with commit 7411055db5ce64f836aaffd422396af0075fdc99 |
| |
| 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-2024-35936 |
| 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/volumes.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/bebd9e0ff90034875c5dfe4bd514fd7055fc7a89 |
| https://git.kernel.org/stable/c/576164bd01bd795f8b09fb194b493103506b33c9 |
| https://git.kernel.org/stable/c/87299cdaae757f3f41212146cfb5b3af416b8385 |
| https://git.kernel.org/stable/c/d1ffa4ae2d591fdd40471074e79954ec45f147f7 |
| https://git.kernel.org/stable/c/36c2a2863bc3896243eb724dc3fd4cf9aea633f2 |
| https://git.kernel.org/stable/c/0d23b34c68c46cd225b55868bc8a269e3134816d |
| https://git.kernel.org/stable/c/1f9212cdbd005bc55f2b7422e7b560d9c02bd1da |
| https://git.kernel.org/stable/c/7411055db5ce64f836aaffd422396af0075fdc99 |
