Out-of-bounds Read in Libsidplayfp
CVE-2026-111148
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/libsidplayfp-psid-dataoffset-underflow-oob-read (technical-description, exploit)
- github.com/libsidplayfp/libsidplayfp/blob/732fa8ec8131fc75aafc2eaea583ddcdeea2a… (technical-description)
- github.com/libsidplayfp/libsidplayfp/blob/732fa8ec8131fc75aafc2eaea583ddcdeea2a… (technical-description)
- github.com/libsidplayfp/libsidplayfp (product)
- www.vulncheck.com/advisories/libsidplayfp-through-3.1.1-heap-out-of-bounds-read… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111148?
- CVE-2026-111148 is a medium-severity vulnerability in Libsidplayfp, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-10-15.
- How severe is CVE-2026-111148?
- Medium severity. CVSS v3 base score is 5.5 out of 10.