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CVE-2026-10678

The MCTP-over-I2C+GPIO target binding in Zephyr (subsys/pmci/mctp/mctp_i2c_gpio_target.c) processes pseudo-register writes from an I2C bus master byte-by-byte in mctp_i2c_gpio_target_write_received() without validating the order or the receive buffer. In the affected versions the MCTP_I2C_GPIO_RX_MSG_ADDR (data) handler dereferences and writes through b->rx_pkt without checking that the receive buffer was allocated: a controller that selects the data register and writes a byte without first send
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5538ff80288349c17b896dec5b21adda7c4a09a1f4c05a9d307c5191a21d6a72
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-476","description":"memory-safety","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3d00fb5d79cc9c90f0778ad7d00ece40d2164503145b4be9f2d5e8648cbcd61a · sha256:f45f68fb8727be5f… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-787","description":"memory-safety","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3d00fb5d79cc9c90f0778ad7d00ece40d2164503145b4be9f2d5e8648cbcd61a · sha256:f45f68fb8727be5f… · /containers/cna/problemTypes/0/descriptions/1

Affected products and versions

1 source assertion
{"collectionURL":"https://github.com/zephyrproject-rtos/zephyr","defaultStatus":"unaffected","packageName":"zephyr","product":"zephyr","programFiles":["include/zephyr/pmci/mctp/mctp_i2c_gpio_target.h","subsys/pmci/mctp/mctp_i2c_gpio_controller.c","subsys/pmci/mctp/mctp_i2c_gpio_target.c"],"vendor":"zephyrproject","versions":[{"lessThan":"4.5.0","status":"affected","version":"4.3.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3d00fb5d79cc9c90f0778ad7d00ece40d2164503145b4be9f2d5e8648cbcd61a · sha256:f45f68fb8727be5f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3d00fb5d79cc9c90f0778ad7d00ece40d2164503145b4be9f2d5e8648cbcd61a · sha256:f45f68fb8727be5f… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-476","description":"memory-safety","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3d00fb5d79cc9c90f0778ad7d00ece40d2164503145b4be9f2d5e8648cbcd61a · sha256:f45f68fb8727be5f… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-787","description":"memory-safety","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3d00fb5d79cc9c90f0778ad7d00ece40d2164503145b4be9f2d5e8648cbcd61a · sha256:f45f68fb8727be5f… · /containers/cna/problemTypes/0/descriptions/1

Source references

2 source assertions
{"name":"Fix commit","tags":["patch"],"url":"https://github.com/zephyrproject-rtos/zephyr/commit/9e23364261a2188c171d734d6947e02ee2a9510f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3d00fb5d79cc9c90f0778ad7d00ece40d2164503145b4be9f2d5e8648cbcd61a · sha256:f45f68fb8727be5f… · /containers/cna/references/0
{"name":"GHSA-pmwm-5rcm-39rr","url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-pmwm-5rcm-39rr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3d00fb5d79cc9c90f0778ad7d00ece40d2164503145b4be9f2d5e8648cbcd61a · sha256:f45f68fb8727be5f… · /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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