| 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-2024-50139: KVM: arm64: Fix shift-out-of-bounds bug |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| KVM: arm64: Fix shift-out-of-bounds bug |
| |
| Fix a shift-out-of-bounds bug reported by UBSAN when running |
| VM with MTE enabled host kernel. |
| |
| UBSAN: shift-out-of-bounds in arch/arm64/kvm/sys_regs.c:1988:14 |
| shift exponent 33 is too large for 32-bit type 'int' |
| CPU: 26 UID: 0 PID: 7629 Comm: qemu-kvm Not tainted 6.12.0-rc2 #34 |
| Hardware name: IEI NF5280R7/Mitchell MB, BIOS 00.00. 2024-10-12 09:28:54 10/14/2024 |
| Call trace: |
| dump_backtrace+0xa0/0x128 |
| show_stack+0x20/0x38 |
| dump_stack_lvl+0x74/0x90 |
| dump_stack+0x18/0x28 |
| __ubsan_handle_shift_out_of_bounds+0xf8/0x1e0 |
| reset_clidr+0x10c/0x1c8 |
| kvm_reset_sys_regs+0x50/0x1c8 |
| kvm_reset_vcpu+0xec/0x2b0 |
| __kvm_vcpu_set_target+0x84/0x158 |
| kvm_vcpu_set_target+0x138/0x168 |
| kvm_arch_vcpu_ioctl_vcpu_init+0x40/0x2b0 |
| kvm_arch_vcpu_ioctl+0x28c/0x4b8 |
| kvm_vcpu_ioctl+0x4bc/0x7a8 |
| __arm64_sys_ioctl+0xb4/0x100 |
| invoke_syscall+0x70/0x100 |
| el0_svc_common.constprop.0+0x48/0xf0 |
| do_el0_svc+0x24/0x38 |
| el0_svc+0x3c/0x158 |
| el0t_64_sync_handler+0x120/0x130 |
| el0t_64_sync+0x194/0x198 |
| |
| The Linux kernel CVE team has assigned CVE-2024-50139 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.3 with commit 7af0c2534f4c57b16e92dfca8c5f40fa90fbb3f3 and fixed in 6.6.59 with commit 04ed2ba07ce73f323052475fbd33d647aca3ff2e |
| Issue introduced in 6.3 with commit 7af0c2534f4c57b16e92dfca8c5f40fa90fbb3f3 and fixed in 6.11.6 with commit 4b9e11794d910aa55300debbac5f0adcc42c491a |
| Issue introduced in 6.3 with commit 7af0c2534f4c57b16e92dfca8c5f40fa90fbb3f3 and fixed in 6.12 with commit c6c167afa090ea0451f91814e1318755a8fb8bb9 |
| |
| 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-2024-50139 |
| 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/arm64/kvm/sys_regs.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/04ed2ba07ce73f323052475fbd33d647aca3ff2e |
| https://git.kernel.org/stable/c/4b9e11794d910aa55300debbac5f0adcc42c491a |
| https://git.kernel.org/stable/c/c6c167afa090ea0451f91814e1318755a8fb8bb9 |
