CVE-2026-23257
Analyzed Analyzed - Analysis Complete

Off-by-One Error in Linux net/liquidio Causes Memory Leak

Publication date: 2026-03-18

Last updated on: 2026-05-21

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: liquidio: Fix off-by-one error in PF setup_nic_devices() cleanup In setup_nic_devices(), the initialization loop jumps to the label setup_nic_dev_free on failure. The current cleanup loop while(i--) skip the failing index i, causing a memory leak. Fix this by changing the loop to iterate from the current index i down to 0. Also, decrement i in the devlink_alloc failure path to point to the last successfully allocated index. Compile tested only. Issue found using code review.

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Meta Information

Published
2026-03-18
Last Modified
2026-05-21
Generated
2026-07-06
AI Q&A
2026-03-18
EPSS Evaluated
2026-07-05
NVD
CVE-2026-23257
EUVD
EUVD-2026-12888

Affected Vendors & Products

Showing 14 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 5.16 (inc) to 6.1.163 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.70 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.124 (exc)
linux linux_kernel 6.19
linux linux_kernel From 6.13 (inc) to 6.18.10 (exc)
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 5.11 (inc) to 5.15.200 (exc)
linux linux_kernel From 4.2 (inc) to 5.10.250 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-193 A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

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Executive Summary

This vulnerability is an off-by-one error in the Linux kernel's liquidio network driver, specifically in the setup_nic_devices() function. When initializing network interface cards (NICs), if an error occurs, the cleanup loop skips the failing device index, which causes a memory leak. The fix involves changing the cleanup loop to correctly iterate from the current index down to zero, ensuring all allocated resources are properly freed.

Impact Analysis

The vulnerability can lead to a memory leak in the Linux kernel when the liquidio driver fails to properly clean up after a device initialization error. Over time, this memory leak could degrade system performance or stability, potentially causing resource exhaustion or crashes in systems using the affected driver.

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