{"id":"DEBIAN-CVE-2023-53327","details":"In the Linux kernel, the following vulnerability has been resolved:  iommufd/selftest: Catch overflow of uptr and length  syzkaller hits a WARN_ON when trying to have a uptr close to UINTPTR_MAX:    WARNING: CPU: 1 PID: 393 at drivers/iommu/iommufd/selftest.c:403 iommufd_test+0xb19/0x16f0   Modules linked in:   CPU: 1 PID: 393 Comm: repro Not tainted 6.2.0-c9c3395d5e3d #1   Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014   RIP: 0010:iommufd_test+0xb19/0x16f0   Code: 94 c4 31 ff 44 89 e6 e8 a5 54 17 ff 45 84 e4 0f 85 bb 0b 00 00 41 be fb ff ff ff e8 31 53 17 ff e9 a0 f7 ff ff e8 27 53 17 ff \u003c0f\u003e 0b 41 be 8   RSP: 0018:ffffc90000eabdc0 EFLAGS: 00010246   RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8214c487   RDX: 0000000000000000 RSI: ffff88800f5c8000 RDI: 0000000000000002   RBP: ffffc90000eabe48 R08: 0000000000000000 R09: 0000000000000001   R10: 0000000000000001 R11: 0000000000000000 R12: 00000000cd2b0000   R13: 00000000cd2af000 R14: 0000000000000000 R15: ffffc90000eabe68   FS:  00007f94d76d5740(0000) GS:ffff88807dd00000(0000) knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   CR2: 0000000020000043 CR3: 0000000006880006 CR4: 0000000000770ee0   PKRU: 55555554   Call Trace:    \u003cTASK\u003e    ? write_comp_data+0x2f/0x90    iommufd_fops_ioctl+0x1ef/0x310    __x64_sys_ioctl+0x10e/0x160    ? __pfx_iommufd_fops_ioctl+0x10/0x10    do_syscall_64+0x3b/0x90    entry_SYSCALL_64_after_hwframe+0x72/0xdc  Check that the user memory range doesn't overflow.","modified":"2026-09-15T09:02:53.997368306Z","published":"2025-09-16T17:15:38.910Z","upstream":["CVE-2023-53327"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53327"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53327.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53327.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"}]}