CVE-2018-12633
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2018-12633
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-12633.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2018-12633
- Related
- Published
- 2018-06-22T00:29:00Z
- Modified
- 2024-11-21T03:45:34Z
- Severity
-
- 6.3 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
An issue was discovered in the Linux kernel through 4.17.2. vbgmiscdeviceioctl() in drivers/virt/vboxguest/vboxguestlinux.c reads the same user data twice with copyfromuser. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.sizein and hdr.sizeout) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage.
- References
-
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bd23a7269834dc7c1f93e83535d16ebc44b75eba
- https://bugzilla.kernel.org/show_bug.cgi?id=200131
- https://github.com/torvalds/linux/commit/bd23a7269834dc7c1f93e83535d16ebc44b75eba
- https://security-tracker.debian.org/tracker/CVE-2018-12633
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source