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CVE-2023-45666— Possible double-free or memory leak in stbi__load_gif_main in stb_image

Quick assessment

Affected
nothings stb
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

stb是一款用于C/C ++的单文件公共域库。 stb_image 存在安全漏洞，该漏洞源于可能导致内存泄漏和双重释放。

CVSS 7.3 · High EPSS 0.96% · P61

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth
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I. Basic Information for CVE-2023-45666

Vulnerability Information
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Vulnerability Title
Possible double-free or memory leak in stbi__load_gif_main in stb_image
Source: CVE Program / CVE List V5
Vulnerability Description
stb_image is a single file MIT licensed library for processing images. It may look like `stbi__load_gif_main` doesn’t give guarantees about the content of output value `*delays` upon failure. Although it sets `*delays` to zero at the beginning, it doesn’t do it in case the image is not recognized as GIF and a call to `stbi__load_gif_main_outofmem` only frees possibly allocated memory in `*delays` without resetting it to zero. Thus it would be fair to say the caller of `stbi__load_gif_main` is responsible to free the allocated memory in `*delays` only if `stbi__load_gif_main` returns a non null value. However at the same time the function may return null value, but fail to free the memory in `*delays` if internally `stbi__convert_format` is called and fails. Thus the issue may lead to a memory leak if the caller chooses to free `delays` only when `stbi__load_gif_main` didn’t fail or to a double-free if the `delays` is always freed
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Vulnerability Title
stb_image 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
stb是一款用于C/C ++的单文件公共域库。 stb_image 存在安全漏洞，该漏洞源于可能导致内存泄漏和双重释放。
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
nothings stb <= 2.28 -

II. Public POCs for CVE-2023-45666

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9135 chars
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III. Intelligence Information for CVE-2023-45666

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Mailing List Discussions for CVE-2023-45666 (3)

Other References for CVE-2023-45666 (3)

Same Patch Batch · nothings · 2023-10-20 · 14 CVEs total

CVE-2023-45681 7.3 HIGH Out of bounds heap buffer write in stb_vorbis
CVE-2023-45679 7.3 HIGH Attempt to free an uninitialized memory pointer in vorbis_deinit in stb_vorbis
CVE-2023-45677 7.3 HIGH Heap buffer out of bounds write in start_decoder in stb_vorbis
CVE-2023-45676 7.3 HIGH Multi-byte write heap buffer overflow in start_decoder in stb_vorbis
CVE-2023-45664 7.3 HIGH Double-free in stbi__load_gif_main_outofmem in stb_image
CVE-2023-45678 6.5 MEDIUM Off-by-one heap buffer write in start_decoder in stb_vorbis
CVE-2023-45675 6.5 MEDIUM 0 byte write heap buffer overflow in start_decoder in stb_vorbis
CVE-2023-45662 6.5 MEDIUM Multi-byte read heap buffer overflow in stbi__vertical_flip in stb_image
CVE-2023-45661 6.5 MEDIUM Wild address read in stbi__gif_load_next in stb_image
CVE-2023-45682 5.3 MEDIUM Wild address read in vorbis_decode_packet_rest in stb_vorbis
CVE-2023-45680 5.3 MEDIUM Null pointer dereference in vorbis_deinit in stb_vorbis
CVE-2023-45667 5.3 MEDIUM Null pointer dereference because of an uninitialized variable in stb_image
CVE-2023-45663 5.3 MEDIUM Disclosure of uninitialized memory in stbi__tga_load in stb_image

IV. Related Vulnerabilities

Same product: stb
Same vendor: nothings
Same weakness: CWE-415

V. Comments for CVE-2023-45666

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