{"cve":"CVE-2023-53327","nvd":{"published":"2025-09-16T17:15:38.910","modified":"2026-06-17T06:44:54.067","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd/selftest: Catch overflow of uptr and length\n\nsyzkaller hits a WARN_ON when trying to have a uptr close to UINTPTR_MAX:\n\n  WARNING: CPU: 1 PID: 393 at drivers/iommu/iommufd/selftest.c:403 iommufd_test+0xb19/0x16f0\n  Modules linked in:\n  CPU: 1 PID: 393 Comm: repro Not tainted 6.2.0-c9c3395d5e3d #1\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n  RIP: 0010:iommufd_test+0xb19/0x16f0\n  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 <0f> 0b 41 be 8\n  RSP: 0018:ffffc90000eabdc0 EFLAGS: 00010246\n  RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8214c487\n  RDX: 0000000000000000 RSI: ffff88800f5c8000 RDI: 0000000000000002\n  RBP: ffffc90000eabe48 R08: 0000000000000000 R09: 0000000000000001\n  R10: 0000000000000001 R11: 0000000000000000 R12: 00000000cd2b0000\n  R13: 00000000cd2af000 R14: 0000000000000000 R15: ffffc90000eabe68\n  FS:  00007f94d76d5740(0000) GS:ffff88807dd00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000000020000043 CR3: 0000000006880006 CR4: 0000000000770ee0\n  PKRU: 55555554\n  Call Trace:\n   <TASK>\n   ? write_comp_data+0x2f/0x90\n   iommufd_fops_ioctl+0x1ef/0x310\n   __x64_sys_ioctl+0x10e/0x160\n   ? __pfx_iommufd_fops_ioctl+0x10/0x10\n   do_syscall_64+0x3b/0x90\n   entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nCheck that the user memory range doesn't overflow.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/3fb3505636d033bbf7a0851dac63d01732c51d62","https://git.kernel.org/stable/c/adac6508c235a092b91ed9c0110ecf140e9e9441","https://git.kernel.org/stable/c/fd8c1a4aee973e87d890a5861e106625a33b2c4e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:10:08.713834912+00:00"},"epss":{"cve":"CVE-2023-53327","score":0.00146,"percentile":0.03864,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}