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Fencer Vulns
low 3.3

CVE-2026-9504 json

GNU LibreDWG Dwggrep Utility dwggrep.c bit_convert_TU out-of-bounds

published 2026-05-25 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-31745

cvss
3.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

A weakness has been identified in GNU LibreDWG up to 0.14. Affected is the function bit_convert_TU of the file programs/dwggrep.c of the component Dwggrep Utility. This manipulation causes out-of-bounds read. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. Patch name: be996bf2178a40e98720f18c2414815d244413db. Applying a patch is the recommended action to fix this issue.

Patch / fix

  • libredwg openSUSE Leap 16.0 0.14.8413-bp160.1.1
  • libredwg openSUSE Tumbleweed 0.13.4.8200-1.1

opensuse advisories openSUSE-SU-2026:21346-1openSUSE-SU-2026:10879-1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/LibreDWG/libredwg/issues/1246 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/HackC0der/CVE-Repos/blob/main/libredwg/libredwg_6d6a339_heap_overflow_bit_convert_TU.dwg referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
CNA 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
CNA 3.0 3.3 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
CNA 2.0 1.7 AV:L/AC:L/Au:S/C:P/I:N/A:N/E:POC/RL:OF/RC:C
CNA 4.0 1.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA 2.0 1.7 AV:L/AC:L/Au:S/C:P/I:N/A:N

Affected products

  • GNU LibreDWG

Classification

Weakness
  • CWE-125 Out-of-bounds Read
  • 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.