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    CVE-2009-4633

    vorbis_dec.c in FFmpeg 0.5 uses an assignment operator when a comparison operator was intended, which might allow remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted file that modifies a loop counter and triggers a heap-based buffer overflow.

    Published:Feb 10, 2010
    Last Modified:Apr 11, 2025
    EPS:Feb 10, 2010
    EPSS Score:0.06787
    CVSS Score:10

    Affected Products

    Vendor
    Ffmpeg
    Product
    Ffmpeg

    Exploits

    https://roundup.ffmpeg.org/roundup/ffmpeg/issue1240https://roundup.ffmpeg.org/roundup/ffmpeg/issue1240

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-52295 (CVSS 6.2) — Buffer Overflow vulnerability in Ffmpeg v.7.0 and after allows an attacker to cause a denial of service via th…
    CVE-2026-18393 (CVSS 5.4) — A flaw was found in FFmpeg. The tdsc_load_cursor() function writes beyond the bounds of a heap-allocated buffe…
    CVE-2026-38346 (CVSS 7.5) — An integer overflow in the yuv2planeX_8_c() function (libswscale/output.c) of FFmpeg N-122528-gdd2976b9e1 allo…
    CVE-2026-38348 (CVSS 7.5) — An integer overflow in the libswscale/utils.c component of FFmpeg N-122528-gdd2976b9e1 allows attackers to cau…
    CVE-2026-38350 (CVSS 7.5) — An integer overflow in the target_sws_fuzzer() function (libswscale/output.c) of FFmpeg N-122528-gdd2976b9e1 a…
    CVE-2026-38345 (CVSS 6.5) — A Division-by-Zero vulnerability in the ff_sws_init_single_context function (/libswscale/utils.c) of FFmpeg N-…
    CVE-2026-38347 (CVSS 7.5) — A heap overflow in the ff_sws_alphablendaway function (libswscale/alphablend.c) of FFmpeg git-master commit 72…
    CVE-2026-38349 (CVSS 7.5) — An integer overflow in the hScale16To19_c() function (libswscale/output.c) of FFmpeg N-122528-gdd2976b9e1 allo…
    CVE-2026-38344 (CVSS 7.5) — A NULL pointer dereference in the get_min_buffer_size function (/libswscale/slice.c) of FFmpeg N-122528-gdd297…
    CVE-2026-38343 (CVSS 6.5) — An integer overflow in the libavfilter/vf_scale.c component of FFmpeg N-122528-gdd2976b9e1 allows attackers to…

    References

    http://scarybeastsecurity.blogspot.com/2009/09/patching-ffmpeg-into-shape.html
    http://secunia.com/advisories/36805
    http://secunia.com/advisories/38643
    http://secunia.com/advisories/39482
    http://www.debian.org/security/2010/dsa-2000
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:060
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:061
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:088
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:112
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:114
    http://www.securityfocus.com/bid/36465
    http://www.ubuntu.com/usn/USN-931-1
    http://www.vupen.com/english/advisories/2010/0935
    http://www.vupen.com/english/advisories/2011/1241
    https://roundup.ffmpeg.org/roundup/ffmpeg/issue1240
    http://scarybeastsecurity.blogspot.com/2009/09/patching-ffmpeg-into-shape.html
    http://secunia.com/advisories/36805
    http://secunia.com/advisories/38643
    http://secunia.com/advisories/39482
    http://www.debian.org/security/2010/dsa-2000
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:060
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:061
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:088
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:112
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:114
    http://www.securityfocus.com/bid/36465
    http://www.ubuntu.com/usn/USN-931-1
    http://www.vupen.com/english/advisories/2010/0935
    http://www.vupen.com/english/advisories/2011/1241
    https://roundup.ffmpeg.org/roundup/ffmpeg/issue1240

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High