AZL-67013
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-67013.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-67013
- Upstream
- Published
- 2025-09-05T18:15:49Z
- Modified
- 2026-04-01T05:21:06.511611Z
- Summary
- CVE-2025-39716 affecting package kernel for versions less than 6.6.104.2-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
parisc: Revise _getuser() to probe user read access
Because of the way read access support is implemented, read access interruptions are only triggered at privilege levels 2 and 3. The kernel executes at privilege level 0, so _getuser() never triggers a read access interruption (code 26). Thus, it is currently possible for user code to access a read protected address via a system call.
Fix this by probing read access rights at privilege level 3 (PRIV_USER) and setting _guerr to -EFAULT (-14) if access isn't allowed.
Note the cmpiclr instruction does a 32-bit compare because COND macro doesn't work inside asm.
- References