Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111148libsidplayfp through 3.1.1 Heap Out-of-Bounds Read via SidTuneBase::acceptSidTune
Medium 5.5
In plain English
A medium-severity out-of-bounds read in libsidplayfp from libsidplayfp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 97.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libsidplayfp | no fix listed | DEBIAN-CVE-2026-111148 |
| Debian:13 | libsidplayfp | no fix listed | DEBIAN-CVE-2026-111148 |
| Debian:14 | libsidplayfp | no fix listed | DEBIAN-CVE-2026-111148 |
| Ubuntu:22.04:LTS | libsidplayfp | no fix listed | UBUNTU-CVE-2026-111148 |
| Ubuntu:24.04:LTS | libsidplayfp | no fix listed | UBUNTU-CVE-2026-111148 |
| Ubuntu:26.04:LTS | libsidplayfp | no fix listed | UBUNTU-CVE-2026-111148 |
| Ubuntu:26.10 | libsidplayfp | no fix listed | UBUNTU-CVE-2026-111148 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| libsidplayfp | libsidplayfp | 0 – through 3.1.1 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://hackmd.io/@haind-pwn/libsidplayfp-psid-dataoffset-underflow-oob-read technical-description, exploit
- https://github.com/libsidplayfp/libsidplayfp/blob/732fa8ec8131fc75aafc2eaea583ddcdeea2a3cc/src/sidtune/SidTuneBase.cpp#L295-L300 technical-description
- https://github.com/libsidplayfp/libsidplayfp/blob/732fa8ec8131fc75aafc2eaea583ddcdeea2a3cc/src/sidtune/SidTuneBase.cpp#L488-L500 technical-description
- https://github.com/libsidplayfp/libsidplayfp product
- VulnCheck Advisory: libsidplayfp through 3.1.1 Heap Out-of-Bounds Read via SidTuneBase::acceptSidTune third-party-advisory