Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 28a9b71671fb4a2993ef85b8ef6f117ea63894fe; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4c981077255acc2ed5b3df6e8dd0125c81b626a9; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f410ef9a032caf98117256b22139c31342d7bb06; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 741b163e440683195b8fd4fc8495fcd0105c6ab7; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 89f686a0fb6e473a876a9a60a13aec67a62b9a7e |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 6.1.149 through 6.1.*; unaffected 6.6.103 through 6.6.*; unaffected 6.12.44 through 6.12.*; unaffected 6.16.4 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/28a9b71671fb4a2993ef85b8ef6f117ea63894fe
- https://git.kernel.org/stable/c/4c981077255acc2ed5b3df6e8dd0125c81b626a9
- https://git.kernel.org/stable/c/f410ef9a032caf98117256b22139c31342d7bb06
- https://git.kernel.org/stable/c/741b163e440683195b8fd4fc8495fcd0105c6ab7
- https://git.kernel.org/stable/c/89f686a0fb6e473a876a9a60a13aec67a62b9a7e
ADP enrichment
No English description supplied.
No English description supplied.