An update for ffmpeg is now available for openEuler-24.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-3638 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-24.03-LTS-SP1 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 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) FFmpeg versions from 4.4 up to, but not including, 9.0 contain an out-of-bounds heap write vulnerability in the native GoPro CineForm HD (CFHD) decoder that allows remote attackers to corrupt heap memory by supplying a crafted AVI file during stream probing. The cfhd_decode() function fails to enforce the non-Bayer logical output-width invariant in the transform-type-2 reconstruction path, causing horiz_filter_clip() to write oversized 16-bit sample rows far beyond the allocated output frame buffer, which can be escalated to arbitrary code execution via overwrite of a live cleanup callback pointer.(CVE-2026-70632) An update for ffmpeg is now available for openEuler-24.03-LTS-SP1. 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-2026-3638 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://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-70632 https://nvd.nist.gov/vuln/detail/CVE-2026-70628 https://nvd.nist.gov/vuln/detail/CVE-2026-70631 https://nvd.nist.gov/vuln/detail/CVE-2026-70632 openEuler-24.03-LTS-SP1 ffmpeg-6.1.1-48.oe2403sp1.x86_64.rpm ffmpeg-debuginfo-6.1.1-48.oe2403sp1.x86_64.rpm ffmpeg-debugsource-6.1.1-48.oe2403sp1.x86_64.rpm ffmpeg-devel-6.1.1-48.oe2403sp1.x86_64.rpm ffmpeg-libs-6.1.1-48.oe2403sp1.x86_64.rpm libavdevice-6.1.1-48.oe2403sp1.x86_64.rpm ffmpeg-6.1.1-48.oe2403sp1.aarch64.rpm ffmpeg-debuginfo-6.1.1-48.oe2403sp1.aarch64.rpm ffmpeg-debugsource-6.1.1-48.oe2403sp1.aarch64.rpm ffmpeg-devel-6.1.1-48.oe2403sp1.aarch64.rpm ffmpeg-libs-6.1.1-48.oe2403sp1.aarch64.rpm libavdevice-6.1.1-48.oe2403sp1.aarch64.rpm ffmpeg-6.1.1-48.oe2403sp1.src.rpm 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-24.03-LTS-SP1 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-2026-3638 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-24.03-LTS-SP1 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-2026-3638 FFmpeg versions from 4.4 up to, but not including, 9.0 contain an out-of-bounds heap write vulnerability in the native GoPro CineForm HD (CFHD) decoder that allows remote attackers to corrupt heap memory by supplying a crafted AVI file during stream probing. The cfhd_decode() function fails to enforce the non-Bayer logical output-width invariant in the transform-type-2 reconstruction path, causing horiz_filter_clip() to write oversized 16-bit sample rows far beyond the allocated output frame buffer, which can be escalated to arbitrary code execution via overwrite of a live cleanup callback pointer. 2026-09-05 CVE-2026-70632 openEuler-24.03-LTS-SP1 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-2026-3638