{"id":"DEBIAN-CVE-2024-26785","details":"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-\u003eioas to NULL during its process, so the lock might be gone in a concurrent racing context.  Fix this by doing the same access-\u003eioas sanity as iommufd_access_rw() and iommufd_access_pin_pages() functions do.","modified":"2026-10-01T11:03:27.555422015Z","published":"2024-04-04T09:15:08.187Z","upstream":["CVE-2024-26785"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-26785"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.9-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26785.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.9-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26785.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}