CVE-2020-25285: Race Condition
First published: Sun Sep 13 2020(Updated: )
A flaw was found in the Linux kernels sysctl handling code for hugepages management. When multiple root level processes would write to modify the /proc/sys/vm/nr_hugepages file it could create a race on internal variables leading to a system crash or memory corruption.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-305.rt7.72.el8 | 0:4.18.0-305.rt7.72.el8 |
| redhat/kernel | <0:4.18.0-305.el8 | 0:4.18.0-305.el8 |
| Linux Linux kernel | <5.8.8 | |
| Debian Debian Linux | =9.0 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =20.04 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-25285 https://nvd.nist.gov/vuln/detail/CVE-2020-25285
- https://bugzilla.redhat.com/show_bug.cgi?id=1882591
- https://access.redhat.com/errata/RHSA-2021:1739
- https://access.redhat.com/errata/RHSA-2021:1578
- https://access.redhat.com/security/cve/cve-2020-25285
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.8
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17743798d81238ab13050e8e2833699b54e15467
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://security.netapp.com/advisory/ntap-20201009-0002/
- https://twitter.com/grsecurity/status/1303749848898904067
- https://usn.ubuntu.com/4576-1/
- https://usn.ubuntu.com/4579-1/
- https://launchpad.net/bugs/cve/CVE-2020-25285
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1882592
- https://git.kernel.org/linus/17743798d81238ab13050e8e2833699b54e15467
- https://security-tracker.debian.org/tracker/CVE-2020-25285
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25285
- https://nvd.nist.gov/vuln/detail/CVE-2020-25285
- https://ubuntu.com/security/CVE-2020-25285
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