CVE-2020-23904
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service...
CVE-2020-23904 is a medium vulnerability (CVSS 5.5) in Xiph Speex, published November 10, 2021. Its validity is disputed. EPSS puts the chance of exploitation in the next 30 days at 0.72%, the 53rd percentile.
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.
- Record
CVE-2020-23904- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.
- Record
CVE-2020-23904- Updated
- 2026-11-02
EUVDEUVD-2020-16641 No score
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.
- Record
EUVD-2020-16641- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3p3f-h63v-47c5
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service...
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file.
- Record
GHSA-3p3f-h63v-47c5- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.
- Record
CVE-2020-23904- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-23904
A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.
- Record
UBUNTU-CVE-2020-23904- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
speexUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 1.2~rc1.2-1ubuntu11.2~rc1.2-1ubuntu1+esm1 |
None known |
speexUbuntu:18.04:LTS |
All versions, plus listed versions 1.2~rc1.2-1ubuntu11.2~rc1.2-1ubuntu21.2~rc1.2-1ubuntu2.1 |
None known |
speexUbuntu:20.04:LTS |
All versions, plus listed versions 1.2~rc1.2-1ubuntu21.2~rc1.2-1.1ubuntu11.2~rc1.2-1.1ubuntu1.20.04.1 |
None known |
speexUbuntu:22.04:LTS |
All versions, plus listed versions 1.2~rc1.2-1.1ubuntu11.2~rc1.2-1.1ubuntu21.2~rc1.2-1.1ubuntu3 |
None known |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |