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Fencer Intel
low 3.3

CVE-2025-8746 json

GNU libopts __strstr_sse2 memory corruption

published last yr. modified 4mo ago also EUVD-2025-24045

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 15%
public exploits
0
none known

Summary

A vulnerability, which was classified as problematic, was found in GNU libopts up to 27.6. Affected is the function __strstr_sse2. The manipulation leads to memory corruption. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. This issue was initially reported to the tcpreplay project, but the code maintainer explains, that this "bug appears to be in libopts which is an external library." This vulnerability only affects products that are no longer supported by the maintainer.

Patch / fix

  • autogen Debian 14 1:5.18.16-8

debian advisories DEBIAN-CVE-2025-8746

  • autogen SLES for SAP applications 16.0, SLES 16.0 5.18.16-160000.3.1

suse advisories SUSE-SU-2026:20590-1

  • autogen openSUSE Leap 16.0 5.18.16-160000.3.1
  • tcpreplay openSUSE Leap 16.0 4.5.2-bp160.1.1
  • tcpreplay openSUSE Tumbleweed 4.5.1-2.1
  • autogen openSUSE Tumbleweed 5.18.16-8.1

opensuse advisories openSUSE-SU-2026:20270-1openSUSE-SU-2025:20119-1openSUSE-SU-2025:15570-1openSUSE-SU-2025:15557-1

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Vendor advisories

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

red hat product security vex CVE-2025-8746 updated cvss 3.3

libopts: Libopts Memory Corruption Vulnerability

  • Red Hat Enterprise Linux 7 sharutils Red Hat Enterprise Linux 8 sharutils Red Hat Enterprise Linux 9 sharutils Red Hat Enterprise Linux 10 sharutils
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/appneta/tcpreplay/issues/957 referenced PoC, tagged "exploit" by a source, unverified
  • drive.google.com https://drive.google.com/file/d/1yjKOHxvL_9xExy4QUb5x43dxci1x59ts/view?usp=sharing referenced PoC, tagged "exploit" by a source, unverified
  • vuldb.com https://vuldb.com/?submit.623632 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/appneta/tcpreplay/issues/957#issuecomment-3124774393 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:N/VI:N/VA:L/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:N/I:N/A:L/E:P/RL:X/RC:R
CNA 3.0 3.3 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
CNA 2.0 1.7 AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR
CNA 4.0 1.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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:N/I:N/A:L
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 2.0 1.7 AV:L/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • GNU libopts

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787 Out-of-bounds Write

References

Sources

Fencer Intel 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.