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CVE-2025-70101

An out-of-bounds read in the ext4_ext_binsearch_idx function in src/ext4_extent.c of the lwext4 1.0.0 library allows attackers to cause a denial of service by supplying a specially crafted ext4 filesystem image. The vulnerability occurs due to insufficient validation of extent header fields before performing a binary search over extent index entries, which can result in invalid pointer calculations and an out-of-bounds memory read during extent tree traversal.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b0bc76f6899749d721106d127fbb4e26c46d29cb4c1a199ea8427e559f90ed8a
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-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/adp/0/problemTypes/0/descriptions/0
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/06/29/6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/adp/1/references/0
{"tags":["exploit"],"url":"https://github.com/gkostka/lwext4/issues/91"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/adp/0/references/0
{"url":"https://github.com/gkostka/lwext4/issues/91"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/cna/references/0
{"url":"https://github.com/sigdevel/pocs/blob/main/res/lwext4/3/sig11_lwext4_ext4_extent_815"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/cna/references/1
{"url":"https://infosec.exchange/@sigdevel/116668958927817708"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f6d966e54f5d7bf5d532cbce50a557b069fe8b0ab9809a5f119b645b1ad2a9 · sha256:485bbfa80b720eb5… · /containers/cna/references/2

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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