CVE-2021-47087
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-763
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5Patch
- https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4aPatch
- https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29Patch
- https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9adPatch
- https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5Patch
- https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4aPatch
- https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29Patch
- https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9adPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.