CVE-2026-23256
Analyzed Analyzed - Analysis Complete

Off-by-One Error in Linux liquidio VF 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 VF 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. 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-2026-23256
EUVD
EUVD-2026-12887

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 4.10 (inc) to 5.10.250 (exc)

Helpful Resources

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 driver, specifically in the function setup_nic_devices().

During the initialization loop, if a failure occurs, the code jumps to a cleanup label. However, the cleanup loop incorrectly skips the failing index, which causes a memory leak.

The fix involves changing the cleanup loop to iterate correctly from the current index down to zero, ensuring all allocated resources are properly freed.

Impact Analysis

This vulnerability can lead to a memory leak in the Linux kernel's liquidio driver during network device initialization failures.

Memory leaks can degrade system performance over time and potentially lead to resource exhaustion, which might cause system instability or crashes.

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