What’s Vulnerable › Vulnerabilities

CVE-2021-47048: spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op

• 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: 2024-02-28 · updated 2026-08-04
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op When handling op->addr, it is using the buffer "tmpbuf" which has been freed. This will trigger a use-after-free KASAN warning. Let's use temporary variables to store op->addr.val and op->cmd.opcode to fix this issue.

Affected products

• Linux kernel: from 5.10 before 5.10.37; from 5.11 before 5.11.21; from 5.12 before 5.12.4 — fixed in 5.10.37, 5.11.21, 5.12.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.37, 5.11.21, 5.12.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1231279389b5e638bc3b66b9741c94077aed4b5a
• https://git.kernel.org/stable/c/23269ac9f123eca3aea7682d3345c02e71ed696c
• https://git.kernel.org/stable/c/a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58
• https://git.kernel.org/stable/c/d67e0d6bd92ebbb0294e7062bbf5cdc773764e62
• https://git.kernel.org/stable/c/1231279389b5e638bc3b66b9741c94077aed4b5a
• https://git.kernel.org/stable/c/23269ac9f123eca3aea7682d3345c02e71ed696c
• https://git.kernel.org/stable/c/a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58
• https://git.kernel.org/stable/c/d67e0d6bd92ebbb0294e7062bbf5cdc773764e62

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