How severe is CVE-2023-45667?

CVE-2023-45667 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2023-45667 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-45667?

CVE-2023-45667 affects Nothings Stb Image.h. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-45667?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-45667 published?

CVE-2023-45667 was published on 2023-10-21 and last updated on 2026-06-17.

CVE-2023-45667

CVE-2023-45667 is a medium-severity vulnerability in Nothings Stb Image.h with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Nothings Stb Image.h
Published: 2023-10-21
Last modified: 2026-06-17

Description

stb_image is a single file MIT licensed library for processing images. If `stbi__load_gif_main` in `stbi_load_gif_from_memory` fails it returns a null pointer and may keep the `z` variable uninitialized. In case the caller also sets the flip vertically flag, it continues and calls `stbi__vertical_flip_slices` with the null pointer result value and the uninitialized `z` value. This may result in a program crash.

Frequently asked questions

What is CVE-2023-45667?: stb_image is a single file MIT licensed library for processing images. If `stbi__load_gif_main` in `stbi_load_gif_from_memory` fails it returns a null pointer and may keep the `z` variable uninitialized. In case the caller also sets the flip vertically flag, it continues and calls `stbi__vertical_flip_slices` with the null pointer result value and the uninitialized `z` value. This may result in a program crash.
How severe is CVE-2023-45667?: CVE-2023-45667 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2023-45667 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-45667?: CVE-2023-45667 affects Nothings Stb Image.h. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-45667?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-45667 published?: CVE-2023-45667 was published on 2023-10-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nothings:stb_image.h:2.28:*:*:*:*:*:*:*

More vulnerabilities in Nothings Stb Image.h

CVE-2022-28042 — High (CVSS 8.8): stb_image.h v2.27 was discovered to contain an heap-based use-after-free via the function stbi__jpeg_huff_decode.
CVE-2019-19777 — High (CVSS 8.8): stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has a heap-based buffer over-read…
CVE-2018-16981 — High (CVSS 8.8): stb stb_image.h 2.19, as used in catimg, Emscripten, and other products, has a heap-based buffer overflow in the…
CVE-2023-45666 — High (CVSS 7.3): stb_image is a single file MIT licensed library for processing images. It may look like `stbi__load_gif_main`…
CVE-2023-45664 — High (CVSS 7.3): stb_image is a single file MIT licensed library for processing images. A crafted image file can trigger…
CVE-2021-42716 — High (CVSS 7.1): An issue was discovered in stb stb_image.h 2.27. The PNM loader incorrectly interpreted 16-bit PGM files as 8-bit when…

All CVEs affecting Nothings Stb Image.h →

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

CVE-2022-36648 — Critical (CVSS 10.0): The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier,…
CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…

Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →