What is the CVSS score of CVE-2023-53327?

CVE-2023-53327 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Linux Kernel are affected by CVE-2023-53327?

CVE-2023-53327 presents moderate security risk rated CVSS 5.5. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2023-53327?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Linux Kernel CVE-2023-53327

MEDIUM

2025-09-16 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Buffer Overflow Linux Linux Kernel Red Hat Suse

5.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SUSE

MEDIUM

qualitative

Red Hat

7.0 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:12 vuln.today

Patch released

Mar 28, 2026 - 19:12 nvd

Patch available

CVE Published

Sep 16, 2025 - 17:15 nvd

MEDIUM 5.5

DescriptionCVE.org

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.

AnalysisAI

Technical ContextAI

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. Affected products include: Linux Linux Kernel.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Vendor StatusVendor

SUSE

Severity: Medium

Product	Status
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7	Fixed

CVE-2023-53327 vulnerability details – vuln.today

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Linux Kernel CVE-2023-53327

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

More in Linux Kernel

Same technique Buffer Overflow

Vendor StatusVendor

SUSE

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External POC / Exploit Code