| 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-2024-46684: binfmt_elf_fdpic: fix AUXV size calculation when ELF_HWCAP2 is defined |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| binfmt_elf_fdpic: fix AUXV size calculation when ELF_HWCAP2 is defined |
| |
| create_elf_fdpic_tables() does not correctly account the space for the |
| AUX vector when an architecture has ELF_HWCAP2 defined. Prior to the |
| commit 10e29251be0e ("binfmt_elf_fdpic: fix /proc/<pid>/auxv") it |
| resulted in the last entry of the AUX vector being set to zero, but with |
| that change it results in a kernel BUG. |
| |
| Fix that by adding one to the number of AUXV entries (nitems) when |
| ELF_HWCAP2 is defined. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46684 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.10 with commit 10e29251be0e9f774910c1baaa89355859491769 and fixed in 6.10.8 with commit c507da85e4f80c630deb9e98222ccf4118cbe6f8 |
| Issue introduced in 6.10 with commit 10e29251be0e9f774910c1baaa89355859491769 and fixed in 6.11 with commit c6a09e342f8e6d3cac7f7c5c14085236aca284b9 |
| |
| 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-2024-46684 |
| 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/binfmt_elf_fdpic.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/c507da85e4f80c630deb9e98222ccf4118cbe6f8 |
| https://git.kernel.org/stable/c/c6a09e342f8e6d3cac7f7c5c14085236aca284b9 |
