What’s Vulnerable › Vulnerabilities

CVE-2020-15436

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-23 · updated 2026-06-17
• Weakness: CWE-416

Description

Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.

Affected products

• Broadcom Brocade Fabric Operating System Firmware: all versions
• Linux kernel: from 2.6.38 before 4.4.229; from 4.5 before 4.9.229; from 4.10 before 4.14.186; from 4.15 before 4.19.130; from 4.20 before 5.4.49; from 5.5 before 5.7.6 — fixed in 4.14.186, 4.19.130, 4.4.229, 4.9.229, 5.4.49, 5.7.6
• NetApp A250 Firmware: all versions
• NetApp A700S Firmware: all versions
• NetApp Aff 500F Firmware: all versions
• NetApp Aff 8300 Firmware: all versions
• NetApp Aff 8700 Firmware: all versions
• NetApp Aff A400 Firmware: all versions
• NetApp Cloud Backup: all versions
• NetApp Fabric-Attached Storage A400 Firmware: all versions
• NetApp Fas 500F Firmware: all versions
• NetApp Fas 8300 Firmware: all versions
• NetApp Fas 8700 Firmware: all versions
• NetApp H410C Firmware: all versions
• NetApp H610C Firmware: all versions
• NetApp H610S Firmware: all versions
• NetApp H615C Firmware: all versions
• NetApp Solidfire & Hci Management Node: all versions
• NetApp Solidfire Baseboard Management Controller Firmware: all versions

How to fix

Upgrade to a fixed version: Linux kernel 4.14.186, 4.19.130, 4.4.229, 4.9.229. Check the vendor advisory for mitigations.

References

• https://lkml.org/lkml/2020/6/7/379
• https://security.netapp.com/advisory/ntap-20201218-0002/
• https://lkml.org/lkml/2020/6/7/379
• https://security.netapp.com/advisory/ntap-20201218-0002/

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