How severe is CVE-2023-45676?

CVE-2023-45676 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-45676 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-45676?

CVE-2023-45676 affects Nothings Stb Vorbis.c. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-45676?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-45676 published?

CVE-2023-45676 was published on 2023-10-21 and last updated on 2026-06-17.

CVE-2023-45676

CVE-2023-45676 is a high-severity vulnerability in Nothings Stb Vorbis.c with a CVSS 3.x base score of 7.3. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Nothings Stb Vorbis.c
Published: 2023-10-21
Last modified: 2026-06-17

Description

stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of bounds write in `f->vendor[i] = get8_packet(f);`. The root cause is an integer overflow in `setup_malloc`. A sufficiently large value in the variable `sz` overflows with `sz+7` in and the negative value passes the maximum available memory buffer check. This issue may lead to code execution.

Frequently asked questions

What is CVE-2023-45676?: stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of bounds write in `f->vendor[i] = get8_packet(f);`. The root cause is an integer overflow in `setup_malloc`. A sufficiently large value in the variable `sz` overflows with `sz+7` in and the negative value passes the maximum available memory buffer check. This issue may lead to code execution.
How severe is CVE-2023-45676?: CVE-2023-45676 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-45676 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-45676?: CVE-2023-45676 affects Nothings Stb Vorbis.c. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-45676?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-45676 published?: CVE-2023-45676 was published on 2023-10-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nothings:stb_vorbis.c:1.22:*:*:*:*:*:*:*

More vulnerabilities in Nothings Stb Vorbis.c

CVE-2023-47212 — Critical (CVSS 9.8): A heap-based buffer overflow vulnerability exists in the comment functionality of stb _vorbis.c v1.22. A specially…
CVE-2023-45681 — High (CVSS 7.3): stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger memory…
CVE-2023-45679 — High (CVSS 7.3): stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger memory…
CVE-2023-45677 — High (CVSS 7.3): stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of…
CVE-2023-45678 — Medium (CVSS 6.5): stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of…
CVE-2023-45675 — Medium (CVSS 6.5): stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of…

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