CVE-2024-50259: netdevsim: Add trailing zero to terminate the string in nsim_nexthop_bucket_activity_write()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-09 · updated 2026-06-17
Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: netdevsim: Add trailing zero to terminate the string in nsim_nexthop_bucket_activity_write() This was found by a static analyzer. We should not forget the trailing zero after copy_from_user() if we will further do some string operations, sscanf() in this case. Adding a trailing zero will ensure that the function performs properly.

Affected products

Linux kernel: from 5.13 before 5.15.171; from 5.16 before 6.1.116; from 6.2 before 6.6.60; from 6.7 before 6.11.7; 6.12-rc1, 6.12-rc2, 6.12-rc3, 6.12-rc4, 6.12-rc5 — fixed in 5.15.171, 6.1.116, 6.11.7, 6.6.60

How to fix

Upgrade to a fixed version: Linux kernel 5.15.171, 6.1.116, 6.11.7, 6.6.60. Check the vendor advisory for mitigations.

References

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