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CVE-2023-53108

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net/iucv: Fix size of interrupt data iucv_irq_data needs to be 4 bytes larger.

Published May 2, 2025EPSS 0.20%

Overview

CVE-2023-53108 is a medium-severity vulnerability. It was published on May 2, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

net/iucv: Fix size of interrupt data

iucv_irq_data needs to be 4 bytes larger.

These bytes are not used by the iucv module, but written by

the z/VM hypervisor in case a CPU is deconfigured.

Reported as:

BUG dma-kmalloc-64 (Not tainted): kmalloc Redzone overwritten

-----------------------------------------------------------------------------

0x0000000000400564-0x0000000000400567 @offset=1380. First byte 0x80 instead of 0xcc

Allocated in iucv_cpu_prepare+0x44/0xd0 age=167839 cpu=2 pid=1

__kmem_cache_alloc_node+0x166/0x450

kmalloc_node_trace+0x3a/0x70

iucv_cpu_prepare+0x44/0xd0

cpuhp_invoke_callback+0x156/0x2f0

cpuhp_issue_call+0xf0/0x298

__cpuhp_setup_state_cpuslocked+0x136/0x338

__cpuhp_setup_state+0xf4/0x288

iucv_init+0xf4/0x280

do_one_initcall+0x78/0x390

do_initcalls+0x11a/0x140

kernel_init_freeable+0x25e/0x2a0

kernel_init+0x2e/0x170

__ret_from_fork+0x3c/0x58

ret_from_fork+0xa/0x40

Freed in iucv_init+0x92/0x280 age

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/3cfdefdaaa4b2a77e84d0db5e0a47a7aa3bb615aRefgit.kernel.org/stable/c/3d87debb8ed2649608ff432699e7c961c0c6f03bRefgit.kernel.org/stable/c/71da5991b6438ad6da13ceb25465ee2760a1c52fRefgit.kernel.org/stable/c/93a970494881004c348d8feb38463ee72496e99aRefgit.kernel.org/stable/c/a908eae0f71811afee86be7088692f1aa5855c3bRefgit.kernel.org/stable/c/b0d2bb5e31a693ebc8888eb407f8a257a3680efaRefgit.kernel.org/stable/c/bd2e78462ae18484e55ae4d285df2c86b86bdd12Refgit.kernel.org/stable/c/c78f1345db4e4b3b78f9b768f4074ebd60abe966

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53108?

CVE-2023-53108 is a medium-severity vulnerability. It was published on May 2, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53108?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-53108?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-53108?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53108 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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