CVE-2018-18281
- State
- Published
- Severity
- Not scored
- Published
- Oct 30, 2018
- Updated
- Aug 5, 2024
- Reserved
- Oct 12, 2018
Description
Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html
- USN-3835-1vendor-advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16
- USN-3880-1vendor-advisory
- USN-3871-5vendor-advisory
- USN-3871-4vendor-advisory
- [oss-security] 20181029 Linux kernel: TLB flush happens too late on mremap (CVE-2018-18281; fixed in 4.9.135, 4.14.78, 4.18.16, 4.19)mailing-list
- USN-3880-2vendor-advisory
- USN-3832-1vendor-advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821
- 105761vdb-entry
- USN-3871-1vendor-advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78
- 106503vdb-entry
- USN-3871-3vendor-advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1695
- [debian-lts-announce] 20190315 [SECURITY] [DLA 1715-1] linux-4.9 security updatemailing-list
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135
- [debian-lts-announce] 20190327 [SECURITY] [DLA 1731-1] linux security updatemailing-list
- [debian-lts-announce] 20190401 [SECURITY] [DLA 1731-2] linux regression updatemailing-list
- RHSA-2019:0831vendor-advisory
- RHSA-2019:2043vendor-advisory
- RHSA-2019:2029vendor-advisory
- RHSA-2020:0036vendor-advisory
- RHSA-2020:0100vendor-advisory
- RHSA-2020:0103vendor-advisory
- RHSA-2020:0179vendor-advisory
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