CVE-2021-47087
Medium
Elevated severity or exploit probability.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.2%
14.9th percentile
CISA KEV
Not listed
Weakness / dates
CWE-763
Published 2024-03-04 · modified 2026-08-04
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2024-03-04 — Published (NVD)
- 2026-08-04 — Last modified (NVD)
Description
In the Linux kernel, the following vulnerability has been resolved: tee: optee: Fix incorrect page free bug Pointer to the allocated pages (struct page *page) has already progressed towards the end of allocation. It is incorrect to perform __free_pages(page, order) using this pointer as we would free any arbitrary pages. Fix this by stop modifying the page pointer.
Affected
References
- https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5
- https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a
- https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29
- https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad
- https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5
- https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a
- https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29
- https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad