CVE-2025-6273
WebAssembly wabt binary-reader-objdump.cc LogOpcode assertion
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
WebAssembly wabt binary-reader-objdump.cc LogOpcode assertion
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
- Record
CVE-2025-6273- CVSS 4.0
- 4.8 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R - CVSS 3.0
- 3.3 Low
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R - CVSS 2.0
- 1.7
AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR - Weakness
- CWE-617
- Updated
- 2026-11-02
EUVDEUVD-2025-18694
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
- Record
EUVD-2025-18694- CVSS 4.0
- 4.8 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-frwp-9m3q-pjc8
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This...
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
- Record
GHSA-frwp-9m3q-pjc8- CVSS 4.0
- 1.9 Low
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-617
- Updated
- 2026-11-02
NVD
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
- Record
CVE-2025-6273- CVSS 4.0
- 1.9 Low
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - CVSS 2.0
- 1.7 Low
AV:L/AC:L/Au:S/C:N/I:N/A:P - Weakness
- CWE-617
- Updated
- 2026-11-02
OSV
WebAssembly wabt binary-reader-objdump.cc LogOpcode assertion
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
- Record
CVE-2025-6273- CVSS 4.0
- 1.9 Low
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P - Weakness
- CWE-617
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2025-6273
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
- Record
DEBIAN-CVE-2025-6273- CVSS 4.0
- 1.9 Low
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-6273
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
- Record
UBUNTU-CVE-2025-6273- CVSS 4.0
- 1.9 Low
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
wabtDebian:12 |
All versions, plus listed versions 1.0.32-11.0.33-11.0.34+dsfg+~cs1.0.32-11.0.34+dsfg2+~cs1.0.32-11.0.34+dsfg2+~cs1.0.32-2 Show 7 moreShow less1.0.34+dsfg2+~cs1.0.32-31.0.34+dsfg2+~cs1.0.32-41.0.34-11.0.36+dfsg+~cs1.0.36-11.0.36+dfsg+~cs1.0.36-21.0.41+dfsg+~cs1.0.39-11.0.41+dfsg+~cs1.0.39-2 |
None known |
wabtDebian:13 |
All versions, plus listed versions 1.0.36+dfsg+~cs1.0.36-21.0.41+dfsg+~cs1.0.39-11.0.41+dfsg+~cs1.0.39-2 |
None known |
wabtDebian:14 |
All versions, plus listed versions 1.0.36+dfsg+~cs1.0.36-21.0.41+dfsg+~cs1.0.39-11.0.41+dfsg+~cs1.0.39-2 |
None known |
wabtUbuntu:20.04:LTS |
All versions, plus listed versions 1.0.11-11.0.12-11.0.13-11.0.13-1build1 |
None known |
wabtUbuntu:22.04:LTS |
All versions, plus listed versions 1.0.20-11.0.24-11.0.24-21.0.25-11.0.26-11.0.27-1 |
None known |
wabtUbuntu:24.04:LTS |
All versions, plus listed versions 1.0.33-11.0.34-11.0.34+dsfg2+~cs1.0.32-1ubuntu11.0.34+dsfg2+~cs1.0.32-1ubuntu2 |
None known |
wabtUbuntu:25.10 |
All versions, plus listed versions 1.0.34+dsfg2+~cs1.0.32-1ubuntu21.0.36+dfsg+~cs1.0.36-2ubuntu1 |
None known |
wabtUbuntu:26.10 |
All versions, plus listed versions 1.0.36+dfsg+~cs1.0.36-2ubuntu11.0.36+dfsg+~cs1.0.36-2ubuntu4 |
None known |
wabtUbuntu:26.04:LTS |
All versions, plus listed versions 1.0.36+dfsg+~cs1.0.36-2ubuntu1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-6273 is a medium vulnerability (CVSS 4.8) in Webassembly Wabt, published June 19, 2025. Its validity is disputed. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 14th percentile.