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CVE-2025-39716 In the Linux kernel, the following vulnerability has been resolved: parisc: Revise __get_user() to probe user read…
Description
In the Linux kernel, the following vulnerability has been resolved: parisc: Revise __get_user() 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 __get_user() 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 __gu_err 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.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Linux 6.17 | premières → < 6.17 | 6.17 |
| Linux 6.16 | premières → < 6.16.4 | 6.16.4 |
| Linux 6.12 | premières → < 6.12.44 | 6.12.44 |
| Linux 6.6 | premières → < 6.6.103 | 6.6.103 |
| Linux 6.1 | premières → < 6.1.149 | 6.1.149 |
| Linux | 2.6.12 | Pas de correctif indiqué |
| SIMATIC CN 4100 5.0 | premières → < 5.0 | 5.0 |
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