CVE-2025-39921 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer Dereference6 documents6 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 94.13%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
LinuxLinux KernelDebian Linux+3 more
Timeline
PublishedOct 1

Description

In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: stop checking viability of op->max_freq in supports_op callback In commit 13529647743d9 ("spi: microchip-core-qspi: Support per spi-mem operation frequency switches") the logic for checking the viability of op->max_freq in mchp_coreqspi_setup_clock() was copied into mchp_coreqspi_supports_op(). Unfortunately, op->max_freq is not valid when this function is called during probe but is instead zero. Acco…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages7 packages

▶NVDlinux/linux_kernel6.14 — 6.16.6+1
▶Debianlinux/linux_kernel< 6.16.6-1
▶CVEListV5linux/linux13529647743d906ed3cf991f1d77727e7ff1fb6f — ac8a13f35d5b8996582b3f97b924838a5c570c18+2
▶debiandebian/linux< linux 6.16.6-1 (forky)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-6595-xfjg-wffj: In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: stop checking viability of op->max_freq in supports_op↗2025-10-01
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OSV
CVE-2025-39921: In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: stop checking viability of op->max_freq in supports_op c↗2025-10-01
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📋Vendor Advisories

3
Red Hat
kernel: spi: microchip-core-qspi: stop checking viability of op->max_freq in supports_op callback↗2025-10-01
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Debian
CVE-2025-39921: linux - In the Linux kernel, the following vulnerability has been resolved: spi: microc...↗2025
▶
Microsoft
NULL pointer exception in the Modbus dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file↗2021-11-09
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