| 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-2024-42258: mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines |
| |
| Yves-Alexis Perez reported commit 4ef9ad19e176 ("mm: huge_memory: don't |
| force huge page alignment on 32 bit") didn't work for x86_32 [1]. It is |
| because x86_32 uses CONFIG_X86_32 instead of CONFIG_32BIT. |
| |
| !CONFIG_64BIT should cover all 32 bit machines. |
| |
| [1] https://lore.kernel.org/linux-mm/CAHbLzkr1LwH3pcTgM+aGQ31ip2bKqiqEQ8=FQB+t2c3dhNKNHA@mail.gmail.com/ |
| |
| The Linux kernel CVE team has assigned CVE-2024-42258 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1.81 with commit 87632bc9ecff5ded93433bc0fca428019bdd1cfe and fixed in 6.1.105 with commit 89f2914dd4b47d2fad3deef0d700f9526d98d11f |
| Issue introduced in 6.8 with commit 4ef9ad19e17676b9ef071309bc62020e2373705d and fixed in 6.10.3 with commit 7e1f4efb8d6140b2ec79bf760c43e1fc186e8dfc |
| Issue introduced in 6.8 with commit 4ef9ad19e17676b9ef071309bc62020e2373705d and fixed in 6.11 with commit d9592025000b3cf26c742f3505da7b83aedc26d5 |
| Issue introduced in 6.7.6 with commit 7432376c913381c5f24d373a87ff629bbde94b47 |
| |
| 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-2024-42258 |
| 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: |
| mm/huge_memory.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/89f2914dd4b47d2fad3deef0d700f9526d98d11f |
| https://git.kernel.org/stable/c/a5c399fe433a115e9d3693169b5f357f3194af0a |
| https://git.kernel.org/stable/c/7e1f4efb8d6140b2ec79bf760c43e1fc186e8dfc |
| https://git.kernel.org/stable/c/d9592025000b3cf26c742f3505da7b83aedc26d5 |
