VulnSocial

CVE-2025-70101Disclosure(gkostka / lwext4)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

gkostka CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Other references
Weakness type (CWE)
CWE-125

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • lwext4

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-06-03); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
gkostka
Products
lwext4

1 version affected across 1 product

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-06-03: 1Mentions · 2026-07-01: 1Technical Details · 2026-06-03: 1Technical Details · 2026-07-01: 106-0307-01
Signal classification1 categories
Disclosure
2100.0%
Referenced assets5 URLs
Full discourse2 posts
  • Open Source Security mailing list@oss_security
    Disclosure

    lwext4: ext2/ext3/ext4 filesystem library for microcontrollers CVE-2025-70099: NULL pointer dereference https://www.openwall.com/lists/oss-security/2026/06/29/4 CVE-2025-70100: Divide-by-zero https://www.openwall.com/lists/oss-security/2026/06/29/5 CVE-2025-70101: Out-of-bounds read https://www.openwall.com/lists/oss-security/2026/06/29/6

    Post summary

    The post announces three new CVEs in the lwext4 filesystem library, detailing their vulnerability types but providing no exploitation, patch, or PoC information.

    00052573
    4.7K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2025-70101 Out-of-Bounds Read in lwext4 1.0.0 ext4_ext_binsearch_idx Denial ... https://vulmon.com/vulnerabilitydetails?qid=CVE-2025-70101 Customizable Vulnerability Alerts: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=4

    Post summary

    The tweet announces CVE‑2025‑70101, an out‑of‑bounds read vulnerability in lwext4 1.0.0, without providing PoC, exploit code, patch details, or evidence of active exploitation.

    0000033
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appgkostkalwext41.0.0--

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