Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: arm64: errata: Add Cortex-A520 speculative unprivileged load workaround Implement the workaround for ARM Cortex-A520 erratum 2966298. On an affected Cortex-A520 core, a speculatively executed unprivileged load might leak data from a privileged load via a cache side channel. The issue only exists for loads within a translation regime with the same translation (e.g. same ASID and VMID). Therefore, the issue only affects the return to EL0. The workaround is to execute a TLBI before returning to EL0 after all loads of privileged data. A non-shareable TLBI to any address is sufficient. The workaround isn't necessary if page table isolation (KPTI) is enabled, but for simplicity it will be. Page table isolation should normally be disabled for Cortex-A520 as it supports the CSV3 feature and the E0PD feature (used when KASLR is enabled).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 60ffc30d5652810dd34ea2eec41504222f5d5791 before 6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c; affected 60ffc30d5652810dd34ea2eec41504222f5d5791 before 32b0a4ffcaea44a00a61e40c0d1bcc50362aee25; affected 60ffc30d5652810dd34ea2eec41504222f5d5791 before 471470bc7052d28ce125901877dd10e4c048e513 |
| Linux / Linux | affected 3.7; unaffected 0 before 3.7; unaffected 6.1.57 through 6.1.*; unaffected 6.5.7 through 6.5.*; unaffected 6.6 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c
- https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25
- https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.