SB2026092303 - Fedora EPEL 10.4 update for aom, libheif
Published: September 23, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 15 vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2025-68431)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to gain access to potentially sensitive information or crash the application.
The vulnerability exists due to a boundary condition within the HeifPixelImage::overlay() function. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service attack.
2) Out-of-bounds read (CVE-ID: CVE-2026-41069)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in SampleAuxInfoReader::SampleAuxInfoReader in libheif/sequences/track.cc when parsing a malformed HEIF sequence file through heif_context_read_from_file. A remote attacker can supply a specially crafted file to cause a denial of service.
User interaction is required to open or process a crafted HEIF file.
3) Out-of-bounds read (CVE-ID: CVE-2026-49271)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in unc_decoder::get_compressed_image_data_uncompressed when parsing a crafted HEIF file with wrapped icef compressed-unit offsets and sizes. A remote attacker can supply a specially crafted HEIF file to cause a denial of service.
The issue is reached when the cmpC compressed unit type is not image_tile, and user interaction is required to decode the crafted media.
4) Out-of-bounds read (CVE-ID: CVE-2026-47251)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to out-of-bounds read in vvdec_push_data2 in libheif's VVC decoder plugin when parsing a crafted HEIF file with a VVC track. A remote attacker can supply a specially crafted HEIF file to cause a denial of service and disclose sensitive information.
User interaction is required to open or decode the crafted file. Only builds with VVC support enabled are vulnerable.
5) NULL pointer dereference (CVE-ID: CVE-2026-47709)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a null pointer dereference in heif_image_handle_get_image_tiling() when processing a malformed uncompressed HEIF image item missing the ispe property. A remote attacker can supply a specially crafted HEIF file to cause a denial of service.
The issue is reachable through the public C API and may trigger an assertion in debug builds.
6) Integer overflow (CVE-ID: CVE-2026-47714)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to integer overflow or wraparound in the inline mask parsing code in libheif/region.cc when parsing a crafted HEIF file. A remote attacker can trick the victim into opening a crafted file to cause a denial of service and disclose sensitive information.
The issue is reachable when applications raise the max_image_size_pixels limit or disable it via LIBHEIF_SECURITY_LIMITS=off.
7) Use of uninitialized resource (CVE-ID: CVE-2026-47247)
CWE-ID: CWE-908 - Use of Uninitialized Resource
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to use of uninitialized resource and incorrect calculation in libheif grid image decoding when parsing a crafted AVIF or HEIC grid image. A remote attacker can upload a specially crafted image for decoding and obtain heap memory contents from visible pixels in the decoded output to disclose sensitive information.
The leaked data may include heap contents such as library function pointers that can be used to defeat ASLR, and the issue is exposed when decoded output is made available to the attacker.
8) Out-of-bounds read (CVE-ID: CVE-2026-48029)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to out-of-bounds read in ImageItem_Grid::decode_grid_tile when parsing a crafted HEIF/HEIC file containing a grid-derived item with an irot rotation property. A remote attacker can send a specially crafted file to cause a denial of service and disclose sensitive information.
User interaction is required to open or decode the crafted file.
9) Out-of-bounds write (CVE-ID: CVE-2026-47178)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to out-of-bounds write in unc_decoder_component_interleave::decode_tile() when parsing a crafted HEIF file using the uncompressed unci codec with tiled, component-interleaved 4:2:0 content. A remote attacker can supply a specially crafted HEIF file to execute arbitrary code.
Only instances built with WITH_UNCOMPRESSED_CODEC=ON are vulnerable.
10) Out-of-bounds read (CVE-ID: CVE-2026-47254)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service or disclose sensitive information.
The vulnerability exists due to out-of-bounds read in Track::get_next_sample_raw_data() when parsing a crafted HEIC sequence file and retrieving raw sequence samples. A remote attacker can supply a specially crafted file to cause a denial of service or disclose sensitive information.
The issue is triggered when the number of chunks defined in the stco box is less than the number of samples in stsz, causing an invalid chunk index to be stored in the presentation timeline.
11) Out-of-bounds read (CVE-ID: CVE-2026-62292)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in unc_decoder::get_compressed_image_data_uncompressed() when decoding an advertised image tile from a crafted HEIF uncompressed image through heif_image_handle_decode_image_tile(). A remote attacker can supply a specially crafted HEIF file and trigger tile decoding to cause a denial of service.
The issue is not triggered by merely opening the file; the vulnerable path is reached when an application enumerates tiling metadata and decodes an advertised tile.
12) Integer underflow (CVE-ID: CVE-2026-62289)
CWE-ID: CWE-191 - Integer underflow
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer underflow in the Fraction constructor when processing a crafted HEIF/AVIF file through the tiling API with process_image_transformations=1. A remote attacker can supply a specially crafted file to cause a denial of service.
User interaction is required to open the crafted file, or the issue can be triggered server-side when uploaded content is processed automatically.
13) Reachable assertion (CVE-ID: CVE-2026-62377)
CWE-ID: CWE-617 - Reachable Assertion
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to reachable assertion in HeifContext::get_track() when processing a crafted HEIF sequence file that is accepted with no registered sequence tracks. A remote attacker can trick the victim into opening a crafted file to cause a denial of service.
User interaction is required to open or process the crafted HEIF file. In builds with assertions disabled, the issue may instead lead to undefined behavior due to dereferencing an empty track map.
14) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-50142)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in Box_stsz::parse() fixed-size mode when parsing a crafted HEIF sequence file through the public C API. A remote attacker can supply a crafted HEIF sequence file with an excessive sample_count value to cause a denial of service.
Only the file parser is exercised, and no decoder backend is required.
15) Out-of-bounds write (CVE-ID: CVE-2026-62291)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to out-of-bounds write in unc_encoder_component_interleave::encode_tile when re-encoding a decoded image with mismatched primary and auxiliary alpha plane dimensions. A remote attacker can trick the victim into opening a specially crafted HEIF sequence file and re-encoding the decoded frame to cause memory corruption.
User interaction is required to open a crafted file, and exploitation occurs through a decode and re-encode workflow using the public APIs.
Remediation
Install update from vendor's website.