CVE-2023-29935
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements...
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
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
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
CVE-2023-29935- 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-617
- Updated
- 2026-11-02
CVE List
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
CVE-2023-29935- 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-617
- Updated
- 2026-11-02
EUVDEUVD-2023-33465
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
EUVD-2023-33465- 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
- 2026-11-03
GitHub AdvisoriesGHSA-2wrh-j8p9-w4c5
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements...
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
GHSA-2wrh-j8p9-w4c5- 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-617
- Updated
- 2026-11-02
OSVAZL-26687
CVE-2023-29935 affecting package clang16 for versions less than 16.0.0-2
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
AZL-26687- 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
OSVAZL-26693
CVE-2023-29935 affecting package rust for versions less than 1.72.0-1
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
AZL-26693- 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
Show 4 moreShow less
OSVBELL-CVE-2023-29935
CVE-2023-29935 does not affect BellSoft software
- Record
BELL-CVE-2023-29935- 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
OSV
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
CVE-2023-29935- 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
OSVDEBIAN-CVE-2023-29935
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
DEBIAN-CVE-2023-29935- 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-2023-29935
llvm-project commit a0138390 was discovered to contain an assertion failure at !replacements.count(op) && "operation was already replaced.
- Record
UBUNTU-CVE-2023-29935- 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 |
|---|---|---|
clang16Azure Linux:2 |
before 16.0.0-2 | 16.0.0-2 |
rustAzure Linux:2 |
before 1.72.0-1 | 1.72.0-1 |
llvm-toolchain-13Debian:12 |
All versions, plus listed versions 1:13.0.1-111:13.0.1-121:13.0.1-13 |
None known |
llvm-toolchain-14Debian:12 |
All versions, plus listed versions 1:14.0.6-121:14.0.6-12+powerpc1:14.0.6-131:14.0.6-141:14.0.6-16 Show 6 moreShow less1:14.0.6-16.11:14.0.6-16.1~exp11:14.0.6-171:14.0.6-181:14.0.6-191:14.0.6-20 |
None known |
llvm-toolchain-15Debian:12 |
All versions, plus listed versions 1:15.0.6-41:15.0.6-5~exp11:15.0.6-5~exp21:15.0.6-5~exp31:15.0.7-1 Show 19 moreShow less1:15.0.7-1+hurd.11:15.0.7-101:15.0.7-10.1~exp11:15.0.7-111:15.0.7-11.11:15.0.7-121:15.0.7-131:15.0.7-141:15.0.7-151:15.0.7-15+hurd.11:15.0.7-21:15.0.7-31:15.0.7-41:15.0.7-51:15.0.7-5~exp11:15.0.7-61:15.0.7-71:15.0.7-81:15.0.7-9 |
None known |
llvm-toolchain-13Ubuntu:22.04:LTS |
All versions, plus listed versions 1:13.0.0-21:13.0.0-91:13.0.1-2ubuntu11:13.0.1-2ubuntu21:13.0.1-2ubuntu2.11:13.0.1-2ubuntu2.2 |
None known |
llvm-toolchain-14Ubuntu:22.04:LTS |
All versions, plus listed versions 1:14.0.0~+rc1-11:14.0.0~+rc1-1ubuntu41:14.0.0~+rc4-1ubuntu11:14.0.0-1ubuntu11:14.0.0-1ubuntu1.1 |
None known |
llvm-toolchain-15Ubuntu:22.04:LTS |
All versions, plus listed versions 1:15.0.6-3~ubuntu0.22.04.21:15.0.7-0ubuntu0.22.04.11:15.0.7-0ubuntu0.22.04.21:15.0.7-0ubuntu0.22.04.3 |
None known |
llvm-toolchain-14Ubuntu:24.04:LTS |
All versions, plus listed versions 1:14.0.6-161:14.0.6-16build11:14.0.6-16build21:14.0.6-19build21:14.0.6-19build4 |
None known |
llvm-toolchain-15Ubuntu:24.04:LTS |
All versions, plus listed versions 1:15.0.7-101:15.0.7-10build11:15.0.7-10build21:15.0.7-10ubuntu11:15.0.7-111:15.0.7-14build11:15.0.7-14build3 |
None known |
llvm-toolchain-14Ubuntu:25.10 |
All versions, plus listed versions 1:14.0.6-20ubuntu11:14.0.6-20ubuntu3 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-29935 is a medium vulnerability (CVSS 5.5) in Llvm, published May 5, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 12th percentile. Fixed in clang16 16.0.0-2.