Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-110875AdPlug through 2.4 Heap Buffer Overflow via CksmPlayer::update in ksm.cpp
Medium 6.1
In plain English
A medium-severity out-of-bounds write in adplug from adplug. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.1%top 96.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
AdPlug through 2.4 contains a heap-based buffer overflow in CksmPlayer::update() in src/ksm.cpp that writes past the fixed databuf[2048] array without bounds checking. Attackers can supply a crafted .ksm module whose notes share one time slot to overflow the heap player object, causing memory corruption and denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | adplug | no fix listed | DEBIAN-CVE-2026-110875 |
| Debian:13 | adplug | no fix listed | DEBIAN-CVE-2026-110875 |
| Debian:14 | adplug | no fix listed | DEBIAN-CVE-2026-110875 |
| Ubuntu:22.04:LTS | adplug | no fix listed | UBUNTU-CVE-2026-110875 |
| Ubuntu:24.04:LTS | adplug | no fix listed | UBUNTU-CVE-2026-110875 |
| Ubuntu:26.04:LTS | adplug | no fix listed | UBUNTU-CVE-2026-110875 |
| Ubuntu:26.10 | adplug | no fix listed | UBUNTU-CVE-2026-110875 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
References
- https://hackmd.io/@haind-pwn/adplug-ksm-note-loop-databuf-oob-write technical-description
- https://github.com/adplug/adplug/blob/e491e382479ed2246f124c96c70d94561dce59b9/src/ksm.cpp#L99-L229 technical-description
- https://github.com/adplug/adplug/issues/292 issue-tracking
- https://github.com/adplug/adplug/pull/295 issue-tracking, patch
- https://github.com/adplug/adplug product
- VulnCheck Advisory: AdPlug through 2.4 Heap Buffer Overflow via CksmPlayer::update in ksm.cpp third-party-advisory