CVE-2026-32739— libheif is Vulnerable to Infinite Loop DoS via stts Sample Duration Lookup
Possible ATT&CK Techniques 1AI
T1496 · Resource HijackingAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| strukturag | libheif | < 1.22.0 | affected |
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I. Basic Information for CVE-2026-32739
Vulnerability Information
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Vulnerability Title
libheif is Vulnerable to Infinite Loop DoS via stts Sample Duration Lookup
Source: NVD (National Vulnerability Database)
Vulnerability Description
libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This issue has been fixed in version 1.22.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: NVD (National Vulnerability Database)
Vulnerability Title
libheif 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libheif是struktur开源的一款 ISO/IEC 23008-12:2017 HEIF 文件格式解码器和编码器。 libheif 1.21.2及之前版本存在安全漏洞，该漏洞源于Box_stts::get_sample_duration()中无限循环，消耗100% CPU，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| strukturag | libheif | < 1.22.0 | - |
II. Public POCs for CVE-2026-32739
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-32739 (1)
Vendor Pages for CVE-2026-32739 (1)
Same Patch Batch · strukturag · 2026-05-19 · 6 CVEs total
| CVE-2026-32740 | 8.8 HIGH | libheif: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing |
| CVE-2026-32741 | 7.1 HIGH | libheif has a heap buffer overflow in decode_mask_image() |
| CVE-2026-32882 | 7.1 HIGH | libheif: Heap Buffer OOB Read in overlay compositing due to wrong alpha stride |
| CVE-2026-32738 | 6.5 MEDIUM | libheif has a Heap OOB Read/SEGV Crash via Zero samples_per_chunk |
| CVE-2026-32814 | 6.5 MEDIUM | libheif: Uninitialized Heap Memory Information Leak via Failed Grid Tiles |
IV. Related Vulnerabilities
Same product: libheif
- CVE-2026-41071
libheif: Heap buffer over-read in SampleAuxInfoReader via cr - CVE-2026-41069
libheif allows Out-of-bounds vector access leading to invali - CVE-2026-32882
libheif: Heap Buffer OOB Read in overlay compositing due to - CVE-2026-32741
libheif has a heap buffer overflow in decode_mask_image() - CVE-2026-32814
libheif: Uninitialized Heap Memory Information Leak via Fail
Same vendor: strukturag
- CVE-2026-41071
libheif: Heap buffer over-read in SampleAuxInfoReader via cr - CVE-2026-41069
libheif allows Out-of-bounds vector access leading to invali - CVE-2026-32882
libheif: Heap Buffer OOB Read in overlay compositing due to - CVE-2026-32741
libheif has a heap buffer overflow in decode_mask_image() - CVE-2026-32814
libheif: Uninitialized Heap Memory Information Leak via Fail
V. Comments for CVE-2026-32739
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