Stack-based buffer overflow in utp.cpp in libutp, as used in Transmission before 2.74 and possibly other products, allows remote attackers…

published 2013-04-03 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-5996

cvss: 7.5; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 5.1%; EPSS 5.1% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

Stack-based buffer overflow in utp.cpp in libutp, as used in Transmission before 2.74 and possibly other products, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted "micro transport protocol packets."

Patch / fix

distros 1 links 1

transmission Debian 14, Debian 13, Debian 12 2.52-3+nmu1

debian advisories DEBIAN-CVE-2012-6129

trac.transmissionbt.com/changeset/13646 patch

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-2012-6129 updated 2025-11-21 cvss 5.0

transmission: Stack-based buffer overflow (DoS) when processing acknowledgements

Red Hat All currently supported Red Hat products
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

Exploit prediction

5.10% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

trac.transmissionbt.com https://trac.transmissionbt.com/changeset/13646 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

trac.transmissionbt.com /changeset/13646
exploit, patch
lists.opensuse.org /opensuse-updates/2013-03/msg00064.html
vendor-advisory
ubuntu.com /usn/USN-1747-1
vendor-advisory
trac.transmissionbt.com /ticket/5002
bugzilla.redhat.com /show_bug.cgi?id=909934
openwall.com /lists/oss-security/2013/02/13/1
mailing-list

Sources

CVE List CVE-2012-6129
NVD CVE-2012-6129

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.

Summary