CVE-2026-107891
High
Description
musl libc before 1.2.7, when an untrusted regular expression is used with regcomp, has multiple integer overflows, possibly leading to incorrect allocation sizes and out-of-bounds heap writes.
SeverityHigh
CVSS8.1
Exploit probability—
ProductMusl
PublishedNov 5, 2026
First seenNov 5, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- musl -libc musl1.2.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| musl -libc musl | 0.5.0 ≤ v < 1.2.7 | 1.2.7 |
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