CVE-2018-18281 — Incomplete Cleanup in Kernel

CWE-459 — Incomplete CleanupCWE-672 — Operation on a Resource after Expiration or Release27 documents10 sources
Severity
7.8HIGHNVD
OSV6.5OSV5.5
EPSS
0.4%
top 37.88%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Linux KernelDebian LinuxCanonical Ubuntu Linux+2 more
Timeline
PublishedOct 30
Latest updateFeb 20

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.

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages5 packages

▶NVDlinux/linux_kernel3.2 — 4.9.135+3
▶Debianlinux/linux_kernel< 4.18.20-1+3
▶Ubuntulinux/linux_kernel< 3.13.0-165.215+2
▶debiandebian/linux< linux 4.18.20-1 (bookworm)

Also affects: Debian Linux 8.0, Ubuntu Linux 12.04, 14.04, 16.04, 18.04, 18.10

Patches

Patch: packetstormsecurity.com ↗Patch: www.openwall.com ↗Patch: bugs.chromium.org ↗

🔴Vulnerability Details

10
GHSA
GHSA-gffw-ppmc-p7r6: Since Linux kernel version 3↗2022-05-13
▶
OSV
qtbase-opensource-src vulnerabilities↗2020-02-10
▶
OSV
linux-azure vulnerabilities↗2019-02-07
▶
OSV
linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities↗2019-02-04
▶
OSV
linux-hwe, linux-aws-hwe, linux-gcp vulnerabilities↗2019-02-04
▶

📋Vendor Advisories

12
Ubuntu
Linux kernel (Azure) vulnerabilities↗2019-02-07
▶
Ubuntu
Linux kernel (Trusty HWE) vulnerabilities↗2019-02-04
▶
Ubuntu
Linux kernel (AWS, GCP, KVM, OEM, Raspberry Pi 2) vulnerabilities↗2019-02-04
▶
Ubuntu
Linux kernel vulnerabilities↗2019-02-04
▶
Ubuntu
Linux kernel (HWE) vulnerabilities↗2019-02-04
▶

📄Research Papers

2
arXiv
Programmable System Call Security with eBPF↗2023-02-20
▶
arXiv
Timeloops: Automatic System Call Policy Learning for Containerized Microservices↗2022-09-26
▶

💬Community

2
Bugzilla
CVE-2018-18281 kernel: TLB flush happens too late on mremap [fedora-all]↗2018-11-09
▶
Bugzilla
CVE-2018-18281 kernel: TLB flush happens too late on mremap↗2018-11-01
▶