In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix protection fault in iommufd_test_syz_conv_iova Syzkaller reported the following bug: general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7] Call Trace: lock_acquire lock_acquire+0x1ce/0x4f0 down_read+0x93/0x4a0 iommufd_test_syz_conv_iova+0x56/0x1f0 iommufd_test_access_rw.isra.0+0x2ec/0x390 iommufd_test+0x1058/0x1e30 iommufd_fops_ioctl+0x381/0x510 vfs_ioctl __do_sys_ioctl __se_sys_ioctl __x64_sys_ioctl+0x170/0x1e0 do_syscall_x64 do_syscall_64+0x71/0x140 This is because the new iommufd_access_change_ioas() sets access->ioas to NULL during its process, so the lock might be gone in a concurrent racing context. Fix this by doing the same access->ioas sanity as iommufd_access_rw() and iommufd_access_pin_pages() functions do.
History

Wed, 13 Nov 2024 02:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux

Thu, 07 Nov 2024 19:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-120

Thu, 10 Oct 2024 11:45:00 +0000


Thu, 19 Sep 2024 10:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-04-04T08:20:18.467Z

Updated: 2024-11-07T18:54:48.729Z

Reserved: 2024-02-19T14:20:24.178Z

Link: CVE-2024-26785

cve-icon Vulnrichment

Updated: 2024-08-02T00:14:13.352Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-04-04T09:15:08.187

Modified: 2024-11-21T09:03:03.967

Link: CVE-2024-26785

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-04-04T00:00:00Z

Links: CVE-2024-26785 - Bugzilla