CVE-2025-70101

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Summary

CVECVE-2025-70101
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-03 14:16:31 UTC
Updated2026-06-05 21:10:09 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS: 0.000270000 probability, percentile 0.081940000 (date 2026-06-05)

Problem Types: CWE-125 | n/a | CWE-125 CWE-125 Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gkostka Lwext4 1.0.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
github.com/gkostka/lwext4/issues/91 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Exploit, Issue Tracking, Patch
infosec.exchange/@sigdevel/116668958927817708 [email protected] infosec.exchange Exploit, Patch, Third Party Advisory
github.com/sigdevel/pocs/blob/main/res/lwext4/3/sig11_lwext4_ext4_extent... [email protected] github.com Exploit
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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