Integer Overflow or Wraparound Affecting glibc package, versions [2.30,2.43)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-GLIBC-14945632
- published15 Jan 2026
- disclosed14 Jan 2026
- creditIgor Morgenstern, Aisle Research
Introduced: 14 Jan 2026
CVE-2026-0861 (opens in a new tab)How to fix?
Upgrade glibc to version 2.43 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound via the _int_memalign function. An attacker can induce heap corruption by supplying an overly large alignment value, which may result in memory corruption or application crashes.
PoC
#include <stdlib.h>
#include <stdint.h>
int main(void) {
void *p;
posix_memalign(&p, 1ULL << 63, PTRDIFF_MAX - 0x30);
return 0;
}