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Fencer Vulns
critical 9.3

CVE-2007-6277 json

Multiple buffer overflows in Free Lossless Audio Codec (FLAC) libFLAC before 1.2.1 allow user-assisted remote attackers to execute arbitrar…

published 2007-12-07 18 y ago modified 2026-06-16 4 mo ago also EUVD-2007-6245

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.7%
EPSS 6.7% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Multiple buffer overflows in Free Lossless Audio Codec (FLAC) libFLAC before 1.2.1 allow user-assisted remote attackers to execute arbitrary code via large (1) Metadata Block Size, (2) VORBIS Comment String Size, (3) Picture Metadata MIME-TYPE Size, (4) Picture Description Size, (5) Picture Data Length, (6) Padding Length, and (7) PICTURE Metadata width and height values in a .FLAC file, which result in a heap-based overflow; and large (8) VORBIS Comment String Size Length, (9) Picture MIME-Type, (10) Picture MIME-Type URL, and (11) Picture Description Length values in a .FLAC file, which result in a stack-based overflow. NOTE: some of these issues may overlap CVE-2007-4619.

Patch / fix

  • flac Debian 14, Debian 13, Debian 12 1.2.1-1

debian advisories DEBIAN-CVE-2007-6277

  • flac RHEL 4 1.1.0-7.el4_5.2
  • flac RHEL 5 1.1.2-28.el5_0.1
  • xmms-flac RHEL 4 1.1.0-7.el4_5.2

red hat advisories RHSA-2007:0975

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-2007-6277 updated

libflac: Multiple security issues fixed in 1.2.1

  • Red Hat Enterprise Linux (v. 5 server) flac 1.1.2-28.el5_0.1 Red Hat Enterprise Linux AS version 4 flac 1.1.0-7.el4_5.2, xmms-flac 1.1.0-7.el4_5.2 Red Hat Enterprise Linux Desktop (v. 5 client) flac 1.1.2-28.el5_0.1 Red Hat Enterprise Linux Desktop version 4 flac 1.1.0-7.el4_5.2, xmms-flac 1.1.0-7.el4_5.2 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) flac 1.1.2-28.el5_0.1 Red Hat Enterprise Linux ES version 4 flac 1.1.0-7.el4_5.2, xmms-flac 1.1.0-7.el4_5.2
    +1 more products
    Red Hat Enterprise Linux WS version 4 flac 1.1.0-7.el4_5.2, xmms-flac 1.1.0-7.el4_5.2
    fixed: vendor fix RHSA-2007:0975

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

6.74% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

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

References

Sources

Fencer Vulns 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.