CVE-2026-23019
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-31

Last updated on: 2026-03-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix NULL dereference on devlink_alloc() failure devlink_alloc() may return NULL on allocation failure, but prestera_devlink_alloc() unconditionally calls devlink_priv() on the returned pointer. This leads to a NULL pointer dereference if devlink allocation fails. Add a check for a NULL devlink pointer and return NULL early to avoid the crash.
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Meta Information
Published
2026-01-31
Last Modified
2026-03-25
Generated
2026-06-16
AI Q&A
2026-02-01
EPSS Evaluated
2026-06-15
NVD
CVE-2026-23019
EUVD
EUVD-2026-5075
Affected Vendors & Products
Showing 14 associated CPEs
Vendor Product Version / Range
linux linux_kernel 5.10
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 6.13 (inc) to 6.18.6 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.121 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.66 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.161 (exc)
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 5.10.1 (inc) to 5.15.198 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version where the prestera driver includes the fix for the NULL pointer dereference in devlink_alloc(). This involves applying the patch that adds a NULL check for the devlink pointer in prestera_devlink_alloc() and returns early to avoid the crash.

Executive Summary

This vulnerability occurs in the Linux kernel's Marvell Prestera driver where a function called devlink_alloc() may fail and return NULL. However, the code does not check for this NULL return value and proceeds to use it, leading to a NULL pointer dereference and a potential crash. The fix involves adding a check for the NULL pointer and returning early to prevent the crash.

Impact Analysis

This vulnerability can cause the system to crash due to a NULL pointer dereference when the devlink allocation fails. This can lead to denial of service or instability in systems using the affected Marvell Prestera driver in the Linux kernel.

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