CVE Explorer

CVE-2026-10645

The Zephyr ext2 filesystem driver (subsys/fs/ext2) trusted the on-disk directory entry fields de_rec_len and de_name_len when walking a directory block. ext2_fetch_direntry() guarded only with de_name_len > EXT2_MAX_FILE_NAME, but de_name_len is a uint8_t and EXT2_MAX_FILE_NAME is 255, so the check is always false; the function then memcpy'd up to 255 name bytes and the lookup/readdir paths advanced traversal by an unvalidated de_rec_len. Each directory block is read into a block_size-sized slab

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3768e9407c65e0ae30fc810e17ed5f8bede732a0c85089cb48a8597d9ebec477

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"collectionURL":"https://github.com/zephyrproject-rtos/zephyr","defaultStatus":"unaffected","packageName":"zephyr","product":"zephyr","programFiles":["subsys/fs/ext2/ext2_diskops.c","subsys/fs/ext2/ext2_diskops.h","subsys/fs/ext2/ext2_impl.c"],"vendor":"zephyrproject","versions":[{"lessThan":"4.5.0","status":"affected","version":"3.5.0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:553826842facbc96129c5769b42db4b3237063d95f94b19d99f3f9c07678d7a7 · sha256:13a98fde98b119c5… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":4.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:553826842facbc96129c5769b42db4b3237063d95f94b19d99f3f9c07678d7a7 · sha256:13a98fde98b119c5… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-125","description":"bounds","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:553826842facbc96129c5769b42db4b3237063d95f94b19d99f3f9c07678d7a7 · sha256:13a98fde98b119c5… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"Fix commit","tags":["patch"],"url":"https://github.com/zephyrproject-rtos/zephyr/commit/7cdb534a3c3daeaec18f656953857dcafa33a2bf"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:553826842facbc96129c5769b42db4b3237063d95f94b19d99f3f9c07678d7a7 · sha256:13a98fde98b119c5… · /containers/cna/references/0

{"name":"GHSA-hwrh-9h3x-vccm","url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hwrh-9h3x-vccm"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:553826842facbc96129c5769b42db4b3237063d95f94b19d99f3f9c07678d7a7 · sha256:13a98fde98b119c5… · /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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