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CVE-2026-10648

mcumgr_serial_process_frag() in subsys/mgmt/mcumgr/transport/src/serial_util.c calls net_buf_reset() on the result of smp_packet_alloc() before checking it for NULL. smp_packet_alloc() uses net_buf_alloc(K_NO_WAIT) against the shared MCUmgr packet pool (CONFIG_MCUMGR_TRANSPORT_NETBUF_COUNT, default 4), which returns NULL when the pool is exhausted. In default builds the __ASSERT_NO_MSG in net_buf_reset is a no-op, so net_buf_simple_reset writes through the NULL pointer (buf->len = 0; buf->data =
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6f067729fe2233e281f3ab7059d4195968183fdd0c017b4fb002dc731d2a14c5
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":["subsys/mgmt/mcumgr/transport/src/serial_util.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:v2:39787e568cc3cb4bb2b9fa7c0137e5b6f1932b1e3b71dd1d019cf1600aad09f2 · sha256:cbb0d235a58b1a92… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":6.2,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:39787e568cc3cb4bb2b9fa7c0137e5b6f1932b1e3b71dd1d019cf1600aad09f2 · sha256:cbb0d235a58b1a92… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-476","description":"memory-safety","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:39787e568cc3cb4bb2b9fa7c0137e5b6f1932b1e3b71dd1d019cf1600aad09f2 · sha256:cbb0d235a58b1a92… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"Fix commit","tags":["patch"],"url":"https://github.com/zephyrproject-rtos/zephyr/commit/6f363ec6f7fd6ae9ed7ca2ae66fd9c82dce31c59"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:39787e568cc3cb4bb2b9fa7c0137e5b6f1932b1e3b71dd1d019cf1600aad09f2 · sha256:cbb0d235a58b1a92… · /containers/cna/references/0
{"name":"GHSA-j64f-h3ww-f32c","url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-j64f-h3ww-f32c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:39787e568cc3cb4bb2b9fa7c0137e5b6f1932b1e3b71dd1d019cf1600aad09f2 · sha256:cbb0d235a58b1a92… · /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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