CVE-2026-63209
CVE-2026-63209 · Integer Overflow or Wraparound and Out-of-bounds Write in compress
This page contains facts from public vulnerability sources. Check the original advisory before updating.
compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.
CVSS 7.5 · High · EPSS 0.6% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
compress
- Versions
- < 1.18.7: Affected
No fix published
golang-github-klauspost-compress Debian:13
- Versions
- 1.18.0+ds1-1
- 1.18.1+ds1-1
- 1.18.6+ds1-1
- 1.18.6+ds1-2
- 1.19.0+ds1-1
- 1.19.0+ds1-2
- 1.20.0+ds1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-klauspost-compress Debian:14
- Versions
- 1.18.0+ds1-1
- 1.18.1+ds1-1
- 1.18.6+ds1-1
- 1.18.6+ds1-2
- Affected ranges
- ECOSYSTEM: < 1.19.0+ds1-1
Update to 1.19.0+ds1-1
golang-github-klauspost-compress Ubuntu:16.04:LTS
- Versions
- 0.0~git20151221.0.2dd54ae-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-klauspost-compress Ubuntu:18.04:LTS
- Versions
- 1.2.1-1
- 1.2.1-2
- 1.2.1-4
- 1.2.1-5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-klauspost-compress Ubuntu:20.04:LTS
- Versions
- 1.2.1-5
- 1.7.6-2
- 1.9.5-1
- 1.9.5-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-klauspost-compress Ubuntu:22.04:LTS
- Versions
- 1.11.7-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-klauspost-compress Ubuntu:24.04:LTS
- Versions
- 1.15.12+ds1-3
- 1.17.7+ds1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-klauspost-compress Ubuntu:26.10
- Versions
- 1.18.1+ds1-1
- 1.19.0+ds1-1
- 1.20.0+ds1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-klauspost-compress Ubuntu:26.04:LTS
- Versions
- 1.18.0+ds1-1
- 1.18.1+ds1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published