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CVE-2023-53327— iommufd/selftest: Catch overflow of uptr and length

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理uptr和length的溢出，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Hard EPSS 0.15% · P4

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux f4b20bb34c83dceade5470288f48f94ce3598ada< adac6508c235a092b91ed9c0110ecf140e9e9441 affected
f4b20bb34c83dceade5470288f48f94ce3598ada< 3fb3505636d033bbf7a0851dac63d01732c51d62 affected
f4b20bb34c83dceade5470288f48f94ce3598ada< fd8c1a4aee973e87d890a5861e106625a33b2c4e affected
6.2 affected
< 6.2 unaffected
6.2.15≤ 6.2.* unaffected
6.3.2≤ 6.3.* unaffected
6.4≤ * unaffected
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I. Basic Information for CVE-2023-53327

Vulnerability Information
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Vulnerability Title
iommufd/selftest: Catch overflow of uptr and length
Source: CVE Program / CVE List V5
Vulnerability Description
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 <0f> 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: <TASK> ? 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理uptr和length的溢出，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux f4b20bb34c83dceade5470288f48f94ce3598ada ~ adac6508c235a092b91ed9c0110ecf140e9e9441 -
Linux Linux 6.2 -

II. Public POCs for CVE-2023-53327

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III. Intelligence Information for CVE-2023-53327

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Same Patch Batch · Linux · 2025-09-16 · 115 CVEs total

CVE-2022-50350 9.8 CRITICAL scsi: target: iscsi: Fix a race condition between login_work and the login thread
CVE-2023-53297 8.8 HIGH Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
CVE-2025-39806 8.8 HIGH HID: multitouch: fix slab out-of-bounds access in mt_report_fixup()
CVE-2025-39827 8.8 HIGH net: rose: include node references in rose_neigh refcount
CVE-2025-39826 8.8 HIGH net: rose: convert 'use' field to refcount_t
CVE-2023-53322 8.8 HIGH scsi: qla2xxx: Wait for io return on terminate rport
CVE-2023-53305 8.8 HIGH Bluetooth: L2CAP: Fix use-after-free
CVE-2023-53315 8.8 HIGH wifi: ath11k: Fix SKB corruption in REO destination ring
CVE-2025-39809 8.4 HIGH HID: intel-thc-hid: intel-quicki2c: Fix ACPI dsd ICRS/ISUB length
CVE-2023-53333 8.2 HIGH netfilter: conntrack: dccp: copy entire header to stack buffer, not just basic one
CVE-2025-39821 7.8 HIGH perf: Avoid undefined behavior from stopping/starting inactive events
CVE-2025-39810 7.8 HIGH bnxt_en: Fix memory corruption when FW resources change during ifdown
CVE-2022-50341 7.8 HIGH cifs: fix oops during encryption
CVE-2023-53311 7.8 HIGH nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput
CVE-2025-39815 7.8 HIGH RISC-V: KVM: fix stack overrun when loading vlenb
CVE-2023-53314 7.8 HIGH fbdev/ep93xx-fb: Do not assign to struct fb_info.dev
CVE-2023-53286 7.8 HIGH RDMA/mlx5: Return the firmware result upon destroying QP/RQ
CVE-2025-39818 7.8 HIGH HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save
CVE-2025-39825 7.8 HIGH smb: client: fix race with concurrent opens in rename(2)
CVE-2023-53274 7.8 HIGH clk: mediatek: mt8183: Add back SSPM related clocks

Showing top 20 of 115 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53327

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