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CVE-2025-9809

31
FAUCET Score

CVE-2025-9809 is a critical out-of-bounds write vulnerability affecting libretro-common in libretro, allowing remote attackers to execute arbitrary code. This flaw occurs when processing a crafted .cue file with an overly long file path, leading to a buffer overflow via memcpy. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no active exploitation, public exploits, or significant community discussion have been observed, its high FAUCET Risk Score of 88/100 indicates a substantial potential threat.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:libretro:libretro-common:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

8.4HIGH

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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

Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 9th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

ubuntupatch availablevia ubuntu_usn
Product: retroarch (noble)Fixed in: 1.18.0+dfsg-1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: retroarch (questing)Fixed in: 1.20.0+dfsg-3ubuntu0.1

Vendor Advisories (1)

ubuntuUSN-8166-1

RetroArch vulnerability

Apr 12, 2026

References

github.com / libretro/libretro-common/blob/master/formats/cdfs/cdfs.c
Product
github.com / libretro/libretro-common/issues/222
Issue TrackingThird Party Advisory