by Kastro
Paper/Archive/CVE-2026-27143

CVE-2026-27143

Go toolchain cmd/compile — Missing bound checks can lead to memory corruption in safe Go in cmd/compile

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
38
CVSS 9.8 (ADP, NVD agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 45.2.452 × 209.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Arithmetic over induction variables in loops were not correctly checked for underflow or overflow. As a result, the compiler would allow for invalid indexing to occur at runtime, potentially leading to memory corruption.

Affected

ProductAffectedFixed inSource
cmd/compile< 1.25.91.25.9CNA
cmd/compile1.26.0-0 – < 1.26.21.26.2CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgo.dev/cl/763765refgo.dev/issue/78333refgroups.google.com/g/golang-announce/c/0uYbvbPZRWUrefpkg.go.dev/vuln/GO-2026-4868