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CVE-2025-70099

A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:60954cb15711e3692d2a9deb90fd89237c8eab62e4b1e0b4f051098fb8fbb0e8
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

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-476","description":"CWE-476 NULL Pointer Dereference","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/adp/0/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:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/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:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-476","description":"CWE-476 NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

5 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/06/29/4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/adp/1/references/0
{"url":"https://github.com/gkostka/lwext4/issues/89"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/gkostka/lwext4/issues/89"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/adp/0/references/0
{"url":"https://github.com/sigdevel/pocs/blob/main/res/lwext4/1/sig11_2_1_lwext4_ext4_dir_h_126"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /containers/cna/references/1
{"url":"https://infosec.exchange/@sigdevel/116668939725424227"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:413b7b29cf19de3a052a0714b94936f93e596a1334cb326a012a953f1e77221e · sha256:7f2aa05248220a2d… · /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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