From bippy-d175d3acf727 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman To: Reply-to: , Subject: CVE-2024-26946: kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address Description =========== In the Linux kernel, the following vulnerability has been resolved: kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address Read from an unsafe address with copy_from_kernel_nofault() in arch_adjust_kprobe_addr() because this function is used before checking the address is in text or not. Syzcaller bot found a bug and reported the case if user specifies inaccessible data area, arch_adjust_kprobe_addr() will cause a kernel panic. [ mingo: Clarified the comment. ] The Linux kernel CVE team has assigned CVE-2024-26946 to this issue. Affected and fixed versions =========================== Issue introduced in 5.18 with commit cc66bb914578 and fixed in 6.1.84 with commit 641768431508 Issue introduced in 5.18 with commit cc66bb914578 and fixed in 6.6.24 with commit f13edd1871d4 Issue introduced in 5.18 with commit cc66bb914578 and fixed in 6.7.12 with commit 20fdb21eabae Issue introduced in 5.18 with commit cc66bb914578 and fixed in 6.8.3 with commit b69f577308f1 Issue introduced in 5.18 with commit cc66bb914578 and fixed in 6.9 with commit 4e51653d5d87 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-2024-26946 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: arch/x86/kernel/kprobes/core.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/6417684315087904fffe8966d27ca74398c57dd6 https://git.kernel.org/stable/c/f13edd1871d4fb4ab829aff629d47914e251bae3 https://git.kernel.org/stable/c/20fdb21eabaeb8f78f8f701f56d14ea0836ec861 https://git.kernel.org/stable/c/b69f577308f1070004cafac106dd1a44099e5483 https://git.kernel.org/stable/c/4e51653d5d871f40f1bd5cf95cc7f2d8b33d063b