https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 06 Oct 2026 12:34:26 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-339732 EUVD-2026-339732 https://cve.radiocsirt.org/vuln/euvd-2026-339732 https://cve.radiocsirt.org/vuln/fkie_cve-2026-10679 <p>The DesignWare SPI driver (drivers/spi/spi_dw.c) computed the SPI BAUDR clock divider as info-&gt;clock_frequency / config-&gt;frequency without validating config-&gt;frequency.</p> <p>spi_transceive is a Zephyr __syscall and its verify handler (drivers/spi/spi_handlers.c) copies the caller-supplied spi_config from userspace without checking the frequency field, so a userspace thread that has been granted access to a DesignWare SPI device kernel object can pass frequency = 0 and trigger an unsigned integer divide-by-zero in spi_dw_configure().</p> <p>On Cortex-M Mainline (SCB-&gt;CCR.DIV_0_TRP is set in z_arm_fault_init()) and on ARC (a dedicated __ev_div_zero vector) this raises a CPU exception, resulting in a kernel fault and local denial of service.</p> <p>The fix rejects zero frequency and frequencies above clock_frequency / 2 (the DesignWare SSI databook minimum SCKDIV of 2) with -EINVAL. The defect affects all Zephyr releases up to and including v4.4.0; exploitation requires CONFIG_USERSPACE=y and an unprivileged thread already granted SPI driver permission. There is no memory-corruption or information-disclosure impact.</p> <p>The DesignWare SPI driver (drivers/spi/spi_dw.c) computed the SPI BAUDR clock divider as info-&gt;clock_frequency / config-&gt;frequency without validating config-&gt;frequency.</p> <p>spi_transceive is a Zephyr __syscall and its verify handler (drivers/spi/spi_handlers.c) copies the caller-supplied spi_config from userspace without checking the frequency field, so a userspace thread that has been granted access to a DesignWare SPI device kernel object can pass frequency = 0 and trigger an unsigned integer divide-by-zero in spi_dw_configure().</p> <p>On Cortex-M Mainline (SCB-&gt;CCR.DIV_0_TRP is set in z_arm_fault_init()) and on ARC (a dedicated __ev_div_zero vector) this raises a CPU exception, resulting in a kernel fault and local denial of service.</p> <p>The fix rejects zero frequency and frequencies above clock_frequency / 2 (the DesignWare SSI databook minimum SCKDIV of 2) with -EINVAL. The defect affects all Zephyr releases up to and including v4.4.0; exploitation requires CONFIG_USERSPACE=y and an unprivileged thread already granted SPI driver permission. There is no memory-corruption or information-disclosure impact.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-10679