CVE-2026-10679

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Source
https://cve.org/CVERecord?id=CVE-2026-10679
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10679.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-10679
Aliases
  • GHSA-3qcm-qwh2-v4hq
Published
2026-07-21T21:30:55Z
Modified
2026-10-17T02:30:45Z
Severity
  • 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
Divide-by-zero in DesignWare SPI driver reachable from spi_transceive syscall (local DoS)
Details

The DesignWare SPI driver (drivers/spi/spi_dw.c) computed the SPI BAUDR clock divider as info->clock_frequency / config->frequency without validating config->frequency.

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().

On Cortex-M Mainline (SCB->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.

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.

Database specific 
{
    "cna_assigner":  "zephyr",
    "cwe_ids":  [
        "CWE-369"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10679.json"
}
References

Affected packages

Git / github.com/zephyrproject-rtos/zephyr

Affected ranges

Type
GIT
Repo
https://github.com/zephyrproject-rtos/zephyr
Events
Introduced
fcb9144dca68f98d24caf39532595555355c3c1d
Fixed
75f67d766726351b30199f9a2bf55803d717a3be
Introduced
684c9e8f32e4373a21098559f748f06915f950c9
Fixed
dccb09599635bdff17633fa7e9dab014b91dce90
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "1.8.0"
        },
        {
            "fixed":  "4.3.1"
        },
        {
            "introduced":  "4.4.0"
        },
        {
            "fixed":  "4.4.2"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v4.*
v4.4.0
v4.4.1
v4.4.1-rc1
v4.4.2-rc1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10679.json"