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Fencer Vulns
high 7.8

CVE-2018-18440 json

DENX U-Boot through 2018.09-rc1 has a locally exploitable buffer overflow via a crafted kernel image because filesystem loading is mishandl…

published 2018-11-20 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-10168

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

DENX U-Boot through 2018.09-rc1 has a locally exploitable buffer overflow via a crafted kernel image because filesystem loading is mishandled.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-19-344-03 updated cvss 7.8

Siemens RUGGEDCOM ROS (Update A)

  • Siemens RUGGEDCOM RMC8388 V4.X <with_U-Boot_V2016.05RS09
    affected: mitigation, no fix planned
  • Siemens RUGGEDCOM RMC8388 V5.X <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RMC8388NC V4.X <with_U-Boot_V2016.05RS09
    affected: mitigation, no fix available
  • Siemens RUGGEDCOM RMC8388NC V5.X <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSG907R <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSG908C <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSG909R <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSG910C <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSG920P V4.X <with_U-Boot_V2016.05RS09
    +1 more products
    Siemens RUGGEDCOM RSG920P V5.X <with_U-Boot_V2016.05RS09
    affected: mitigation, no fix planned
  • Siemens RUGGEDCOM RSG920PNC V4.X <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSG920PNC V5.X <with_U-Boot_V2016.05RS09
    affected: mitigation, no fix available
  • Siemens RUGGEDCOM RSG2488 V4.X <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSG2488 V5.X <with_U-Boot_V2016.05RS09
    affected: mitigation, no fix planned
  • Siemens RUGGEDCOM RSG2488NC V4.X <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSG2488NC V5.X <with_U-Boot_V2016.05RS09
    affected: mitigation, no fix available
  • Siemens RUGGEDCOM RSL910 <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RSL910NC <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RST916C <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RST916P <with_U-Boot_V2016.05RS09 Siemens RUGGEDCOM RST2228 <with_U-Boot_V2016.05RS09
    affected: mitigation, no fix planned
  • Siemens RUGGEDCOM RST2228P <with_U-Boot_V2016.05RS09
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2018/11/02/2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.