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CVE-2026-10644

The Microchip SERCOM-G1 UART driver (drivers/serial/uart_mchp_sercom_g1.c), used by the PIC32CM-JH SoC family, contains an out-of-bounds write in its asynchronous (DMA) receive path. When uart_rx_enable() is invoked with a one-byte receive buffer (len == 1) and CONFIG_UART_MCHP_ASYNC is enabled, the RX-complete ISR starts a single-beat DMA transfer while a received byte is already pending in the SERCOM DATA register. On this SoC the peripheral-triggered DMA start sequencing then writes one byte
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:aa4a69f284754596f5550916260071bf2c3ba26da2e03917cdf48de51086c7e2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"collectionURL":"https://github.com/zephyrproject-rtos/zephyr","defaultStatus":"unaffected","packageName":"zephyr","product":"zephyr","programFiles":["drivers/serial/uart_mchp_sercom_g1.c"],"vendor":"zephyrproject","versions":[{"lessThan":"4.5.0","status":"affected","version":"4.4.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b3d51a893735e8c88958f4f6e6de2ab91b15e559faf6d1fdd57a273c183e754e · sha256:7a0f681d9e6b4e8e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":4.2,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b3d51a893735e8c88958f4f6e6de2ab91b15e559faf6d1fdd57a273c183e754e · sha256:7a0f681d9e6b4e8e… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-787","description":"bounds","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b3d51a893735e8c88958f4f6e6de2ab91b15e559faf6d1fdd57a273c183e754e · sha256:7a0f681d9e6b4e8e… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"Fix commit","tags":["patch"],"url":"https://github.com/zephyrproject-rtos/zephyr/commit/5251d2bc0070be801769fb7ce7b9066fef5d9f81"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b3d51a893735e8c88958f4f6e6de2ab91b15e559faf6d1fdd57a273c183e754e · sha256:7a0f681d9e6b4e8e… · /containers/cna/references/0
{"name":"GHSA-xv2x-56j7-6wc3","url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-xv2x-56j7-6wc3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b3d51a893735e8c88958f4f6e6de2ab91b15e559faf6d1fdd57a273c183e754e · sha256:7a0f681d9e6b4e8e… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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