What’s Vulnerable › Vulnerabilities

CVE-2024-49852: scsi: elx: libefc: Fix potential use after free in efc_nport_vport_del()

• Severity: high (CVSS 7.8 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: 2024-10-21 · updated 2026-06-17
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: elx: libefc: Fix potential use after free in efc_nport_vport_del() The kref_put() function will call nport->release if the refcount drops to zero. The nport->release release function is _efc_nport_free() which frees "nport". But then we dereference "nport" on the next line which is a use after free. Re-order these lines to avoid the use after free.

Affected products

• Linux kernel: from 5.14 before 5.15.168; from 5.16 before 6.1.113; from 6.2 before 6.6.54; from 6.7 before 6.10.13; from 6.11 before 6.11.2 — fixed in 5.15.168, 6.1.113, 6.10.13, 6.11.2, 6.6.54

How to fix

Upgrade to a fixed version: Linux kernel 5.15.168, 6.1.113, 6.10.13, 6.11.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/16a570f07d870a285b0c0b0d1ca4dff79e8aa5ff
• https://git.kernel.org/stable/c/2e4b02fad094976763af08fec2c620f4f8edd9ae
• https://git.kernel.org/stable/c/7c2908985e4ae0ea1b526b3916de9e5351650908
• https://git.kernel.org/stable/c/98752fcd076a8cbc978016eae7125b4971be1eec
• https://git.kernel.org/stable/c/abc71e89170ed32ecf0a5a29f31aa711e143e941
• https://git.kernel.org/stable/c/baeb8628ab7f4577740f00e439d3fdf7c876b0ff
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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