CVE-2010-4051

Status: ModifiedMedium (5)—💥 Exploit
The regcomp implementation in the GNU C Library (aka glibc or libc6) through 2.11.3, and 2.12.x through 2.12.2, allows context-dependent attackers to cause a denial of service (application crash) via a regular expression containing adjacent bounded repetitions that bypass the intended RE_DUP_MAX limitation, as demonstrated by a {10,}{10,}{10,}{10,}{10,} sequence in the proftpd.gnu.c exploit for ProFTPD, related to a "RE_DUP_MAX overflow."
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Base score: 5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 40%
Percentile among all scored CVEs: 99
Score date: 10/7/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.
Published on Exploit-DB · GNU libc/regcomp(3) - Multiple Vulnerabilities (1/7/2011)
Affected technologies (1)

GNU — Glibc
CWEs

NVD-CWE-noinfo
References

Raw JSON (NVD)

Show
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