CVE-2026-10679
- 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
- 2026-07-21T21:30:55.714Z
- Modified
- 2026-07-23T08:25:09.438632Z
- 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/spidw.c) computed the SPI BAUDR clock divider as info->clockfrequency / config->frequency without validating config->frequency.
spi_transceive is a Zephyr __syscall and its verify handler (drivers/spi/spihandlers.c) copies the caller-supplied spiconfig 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 spidwconfigure().
On Cortex-M Mainline (SCB->CCR.DIV0TRP is set in zarmfault_init()) and on ARC (a dedicated __evdivzero vector) this raises a CPU exception, resulting in a kernel fault and local denial of service.
The fix rejects zero frequency and frequencies above clockfrequency / 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 CONFIGUSERSPACE=y and an unprivileged thread already granted SPI driver permission. There is no memory-corruption or information-disclosure impact.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10679.json", "cna_assigner": "zephyr", "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "1.8.0" }, { "fixed": "4.5.0" } ] } ], "cwe_ids": [ "CWE-369" ] }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10679.json
- https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3qcm-qwh2-v4hq
- https://nvd.nist.gov/vuln/detail/CVE-2026-10679
- https://github.com/zephyrproject-rtos/zephyr/commit/65935885622b0e4a5dbe5b82504c30097eb75ce0
- https://github.com/zephyrproject-rtos/zephyr
Affected packages
Git / github.com/zephyrproject-rtos/zephyr
Affected versions
v1.*
v2.*
v3.*
v4.*
zephyr-v1.*
zephyr-v2.*
zephyr-v3.*
Database specific
vanir_signatures
[
{
"digest": {
"threshold": 0.9,
"line_hashes": [
"82776265846683227006542027459325250091",
"146856296094369967311468552804903037937",
"177797596829250425287737839546708089675"
]
},
"signature_version": "v1",
"source": "https://github.com/zephyrproject-rtos/zephyr/commit/65935885622b0e4a5dbe5b82504c30097eb75ce0",
"signature_type": "Line",
"target": {
"file": "drivers/spi/spi_dw.c"
},
"id": "CVE-2026-10679-6f8ece94",
"deprecated": false
},
{
"digest": {
"length": 2591.0,
"function_hash": "49403922862781008198449116658616648094"
},
"signature_version": "v1",
"source": "https://github.com/zephyrproject-rtos/zephyr/commit/65935885622b0e4a5dbe5b82504c30097eb75ce0",
"signature_type": "Function",
"target": {
"function": "spi_dw_configure",
"file": "drivers/spi/spi_dw.c"
},
"id": "CVE-2026-10679-7ee18cf1",
"deprecated": false
}
]
vanir_signatures_modified
"2026-07-23T08:25:09Z"
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10679.json"