An update for ffmpeg is now available for openEuler-20.03-LTS-SP4 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-3640 Final 1.0 1.0 2026-09-05 Initial 2026-09-05 2026-09-05 openEuler SA Tool V1.0 2026-09-05 ffmpeg security update An update for ffmpeg is now available for openEuler-20.03-LTS-SP4 FFmpeg is a complete and free Internet live audio and video broadcasting solution for Linux/Unix. It also includes a digital VCR. It can encode in real time in many formats including MPEG1 audio and video, MPEG4, h263, ac3, asf, avi, real, mjpeg, and flash. Security Fix(es): FFmpeg versions 2.7 through 8.1.2 contain an out-of-bounds write vulnerability in the TDSC video decoder that allows remote attackers to cause heap corruption by supplying a crafted AVI file that changes frame dimensions across TDSF frames. The tdsc_parse_tdsf() function fails to unreference the existing reference frame before calling av_frame_get_buffer(), causing tdsc_blit() and tdsc_yuv2rgb() to write attacker-controlled pixel data beyond the end of the undersized reference frame buffer, resulting in a process crash and potential code execution.(CVE-2026-65703) FFmpeg versions 3.4 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_floodfill video filter that allows attackers to corrupt heap memory by supplying a dynamically sized video stream with filtergraph reinitialization disabled via -reinit_filter 0. When config_input() allocates the points traversal stack based on initial frame dimensions and a subsequent larger frame is processed, filter_frame() performs flood-fill neighbor pushes beyond the original allocation boundary, resulting in heap corruption and process crash with potential for code execution depending on heap layout and process hardening.(CVE-2026-65705) FFmpeg versions from 0.5 up to, but not including, 9.0 contain a signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsub_parser.c that allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow causes the bounds-check guard expression to wrap to INT_MIN, bypassing the PARSE_BUF_SIZE comparison and invoking memcpy() with attacker-controlled data into a heap buffer, resulting in an out-of-bounds heap write and potential memory corruption or code execution.(CVE-2026-70628) FFmpeg versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode a crafted TIFF file can supply a valid Deflate-compressed strip that terminates successfully after producing fewer bytes than the declared strip requires. The tiff_unpack_zlib() function allocates a heap buffer sized for the full declared strip but copies all declared rows via memcpy() regardless of how many bytes zlib actually decompressed, causing unwritten bytes that can contain stale data from prior heap allocations to be incorporated into decoded image output and potentially exposing sensitive data in persistent services.(CVE-2026-70631) An update for ffmpeg is now available for openEuler-20.03-LTS-SP4. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High ffmpeg https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3640 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-65703 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-65705 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-70628 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-70631 https://nvd.nist.gov/vuln/detail/CVE-2026-65703 https://nvd.nist.gov/vuln/detail/CVE-2026-65705 https://nvd.nist.gov/vuln/detail/CVE-2026-70628 https://nvd.nist.gov/vuln/detail/CVE-2026-70631 openEuler-20.03-LTS-SP4 ffmpeg-4.2.4-54.oe2003sp4.aarch64.rpm ffmpeg-debuginfo-4.2.4-54.oe2003sp4.aarch64.rpm ffmpeg-debugsource-4.2.4-54.oe2003sp4.aarch64.rpm ffmpeg-devel-4.2.4-54.oe2003sp4.aarch64.rpm ffmpeg-libs-4.2.4-54.oe2003sp4.aarch64.rpm libavdevice-4.2.4-54.oe2003sp4.aarch64.rpm ffmpeg-4.2.4-54.oe2003sp4.src.rpm ffmpeg-4.2.4-54.oe2003sp4.x86_64.rpm ffmpeg-debuginfo-4.2.4-54.oe2003sp4.x86_64.rpm ffmpeg-debugsource-4.2.4-54.oe2003sp4.x86_64.rpm ffmpeg-devel-4.2.4-54.oe2003sp4.x86_64.rpm ffmpeg-libs-4.2.4-54.oe2003sp4.x86_64.rpm libavdevice-4.2.4-54.oe2003sp4.x86_64.rpm FFmpeg versions 2.7 through 8.1.2 contain an out-of-bounds write vulnerability in the TDSC video decoder that allows remote attackers to cause heap corruption by supplying a crafted AVI file that changes frame dimensions across TDSF frames. The tdsc_parse_tdsf() function fails to unreference the existing reference frame before calling av_frame_get_buffer(), causing tdsc_blit() and tdsc_yuv2rgb() to write attacker-controlled pixel data beyond the end of the undersized reference frame buffer, resulting in a process crash and potential code execution. 2026-09-05 CVE-2026-65703 openEuler-20.03-LTS-SP4 High 7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H ffmpeg security update 2026-09-05 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3640 FFmpeg versions 3.4 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_floodfill video filter that allows attackers to corrupt heap memory by supplying a dynamically sized video stream with filtergraph reinitialization disabled via -reinit_filter 0. When config_input() allocates the points traversal stack based on initial frame dimensions and a subsequent larger frame is processed, filter_frame() performs flood-fill neighbor pushes beyond the original allocation boundary, resulting in heap corruption and process crash with potential for code execution depending on heap layout and process hardening. 2026-09-05 CVE-2026-65705 openEuler-20.03-LTS-SP4 High 7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H ffmpeg security update 2026-09-05 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3640 FFmpeg versions from 0.5 up to, but not including, 9.0 contain a signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsub_parser.c that allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow causes the bounds-check guard expression to wrap to INT_MIN, bypassing the PARSE_BUF_SIZE comparison and invoking memcpy() with attacker-controlled data into a heap buffer, resulting in an out-of-bounds heap write and potential memory corruption or code execution. 2026-09-05 CVE-2026-70628 openEuler-20.03-LTS-SP4 High 7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H ffmpeg security update 2026-09-05 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3640 FFmpeg versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode a crafted TIFF file can supply a valid Deflate-compressed strip that terminates successfully after producing fewer bytes than the declared strip requires. The tiff_unpack_zlib() function allocates a heap buffer sized for the full declared strip but copies all declared rows via memcpy() regardless of how many bytes zlib actually decompressed, causing unwritten bytes that can contain stale data from prior heap allocations to be incorporated into decoded image output and potentially exposing sensitive data in persistent services. 2026-09-05 CVE-2026-70631 openEuler-20.03-LTS-SP4 Medium 5.5 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N ffmpeg security update 2026-09-05 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3640