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medium 5.0

CVE-2010-4051 json

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 at…

published 15y ago modified 4mo ago also EUVD-2010-4027

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
40.0%
EPSS 40.0% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

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."

Patch / fix

  • glibc Debian 14, Debian 13, Debian 12 2.19-4

debian advisories DEBIAN-CVE-2010-4051

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-4051 updated cvss 2.1

glibc: De-recursivise regular expression engine

  • Red Hat Enterprise Linux 4 glibc Red Hat Enterprise Linux 5 glibc Red Hat Enterprise Linux 6 nscd, glibc, glibc-utils, glibc-common
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-15935)
  2. Published

Exploit prediction

40.00% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-15935 GNU libc/regcomp(3) - Multiple Vulnerabilities dos, 2011-01-07
  • seclists.org http://seclists.org/fulldisclosure/2011/Jan/78 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/45233 referenced PoC, tagged "exploit" by a source, unverified
  • securityreason.com http://securityreason.com/securityalert/8003 referenced PoC, tagged "exploit" by a source, unverified
  • securityreason.com http://securityreason.com/achievement_securityalert/93 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=645859 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.