libsidplayfp through 3.1.1 Heap Out-of-Bounds Read via SidTuneBase::acceptSidTune

published 2026-10-15 24 d ago modified 2026-10-16 23 d ago also EUVD-2026-102275

cvss: 5.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits: 0; none known

libsidplayfp through 3.1.1 contains a heap out-of-bounds read vulnerability that allows attackers to crash applications by supplying a PSID/RSID file with an unchecked data offset. Attackers can set the header data offset beyond the file size, wrapping the length calculation so resolveAddrs() reads up to 64 KiB past the heap buffer.

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-2026-111148 updated 2026-10-16 cvss 5.5

libsidplayfp: libsidplayfp: Denial of Service via out-of-bounds read in crafted audio file

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

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: 24 d ago (2026-10-15)

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

hackmd.io https://hackmd.io/@haind-pwn/libsidplayfp-psid-dataoffset-underflow-oob-read referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.8	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA	4.0	6.8	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/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

Affected products

libsidplayfp libsidplayfp

Classification

Weakness

CWE-125 Out-of-bounds Read

References

hackmd.io /@haind-pwn/libsidplayfp-psid-dataoffset-underflow-oob-read
technical-description, exploit
github.com /libsidplayfp/libsidplayfp/blob/732fa8ec8131fc75aafc2eaea583ddcdeea2a3cc/src/sidtune/SidTuneBase.cpp#L295-L300
technical-description
github.com /libsidplayfp/libsidplayfp/blob/732fa8ec8131fc75aafc2eaea583ddcdeea2a3cc/src/sidtune/SidTuneBase.cpp#L488-L500
technical-description
github.com /libsidplayfp/libsidplayfp
product
vulncheck.com /advisories/libsidplayfp-through-3.1.1-heap-out-of-bounds-read-via-sidtunebase-acceptsidtune
third-party-advisory

Sources

CVE List CVE-2026-111148
NVD CVE-2026-111148

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.

Summary