Updated: 2024-08-13 02:00:07.11801
Description:
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix missing hugetlb_lock for resv uncharge There is a recent report on UFFDIO_COPY over hugetlb: https://lore.kernel.org/all/000000000000ee06de0616177560@google.com/ 350:lockdep_assert_held(&hugetlb_lock); Should be an issue in hugetlb but triggered in an userfault context, where it goes into the unlikely path where two threads modifying the resv map together. Mike has a fix in that path for resv uncharge but it looks like the locking criteria was overlooked: hugetlb_cgroup_uncharge_folio_rsvd() will update the cgroup pointer, so it requires to be called with the lock held.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | NONE | 0 |
| CVSS Version 3.x | MEDIUM | 5.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated |
|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | kernel | 5.14.0 | 5.5 | MEDIUM | Needs Triage | 2024-08-26 14:27:08 | |
| AlmaLinux 9.2 FIPS | kernel | 5.14.0 | 5.5 | MEDIUM | Ignored | 2024-08-13 14:25:13 | |
| CentOS 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2024-08-13 14:25:13 | |
| CentOS 7 ELS | kernel | 3.10.0 | 5.5 | MEDIUM | Ignored | 2024-08-13 14:25:12 | |
| CentOS 8.4 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Ignored | 2024-08-20 05:26:08 | |
| CentOS 8.5 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Ignored | 2024-08-20 05:26:09 | |
| CentOS Stream 8 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Ignored | 2024-08-20 05:26:08 | |
| CloudLinux 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2024-08-13 14:25:13 | |
| CloudLinux 7 ELS | kernel | 3.10.0 | 5.5 | MEDIUM | Ignored | 2024-08-13 14:25:12 | |
| Oracle Linux 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2024-08-13 14:25:12 |