CVE-2020-12826: Integer Overflow
First published: Wed Apr 08 2020(Updated: )
A flaw was found in the Linux kernel loose validation of child/parent process identification handling while filtering signal handlers. A local attacker is able to abuse this flaw to bypass checks to send any signal to a privileged process.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.rt56.1131.el7 | 0:3.10.0-1160.rt56.1131.el7 |
| redhat/kernel | <0:3.10.0-1160.el7 | 0:3.10.0-1160.el7 |
| redhat/kernel-rt | <0:4.18.0-240.rt7.54.el8 | 0:4.18.0-240.rt7.54.el8 |
| redhat/kernel | <0:4.18.0-240.el8 | 0:4.18.0-240.el8 |
| Linux Linux kernel | <5.6.5 | |
| Canonical Ubuntu Linux | =20.04 | |
| Redhat Enterprise Linux | =5.0 | |
| Redhat Enterprise Linux | =6.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Mrg | =2.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.106-3 6.1.112-1 6.11.4-1 6.11.5-1 |
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-2020-12826 https://nvd.nist.gov/vuln/detail/CVE-2020-12826 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1e7fd6462ca9fc76650fbe6ca800e35b24267da https://lists.openwall.net/linux-kernel/2020/03/24/1803 https://www.openwall.com/lists/kernel-hardening/2020/03/25/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1822077
- https://access.redhat.com/errata/RHSA-2020:4062
- https://access.redhat.com/errata/RHSA-2020:4060
- https://access.redhat.com/errata/RHSA-2020:4609
- https://access.redhat.com/errata/RHSA-2020:4431
- https://access.redhat.com/security/cve/CVE-2020-12826
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5
- https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://lists.openwall.net/linux-kernel/2020/03/24/1803
- https://security.netapp.com/advisory/ntap-20200608-0001/
- https://usn.ubuntu.com/4367-1/
- https://usn.ubuntu.com/4369-1/
- https://usn.ubuntu.com/4391-1/
- https://www.openwall.com/lists/kernel-hardening/2020/03/25/1
- https://launchpad.net/bugs/cve/CVE-2020-12826
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1834649
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1e7fd6462ca9fc76650fbe6ca800e35b24267da
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12826
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1822077#c12
- https://access.redhat.com/security/cve/CVE-2020-10741
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10741
- https://access.redhat.com/security/cve/cve-2020-12826
- https://nvd.nist.gov/vuln/detail/CVE-2020-12826
- https://security-tracker.debian.org/tracker/CVE-2020-12826
- https://ubuntu.com/security/CVE-2020-12826
- https://git.kernel.org/linus/d1e7fd6462ca9fc76650fbe6ca800e35b24267da
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-12826
- agent/author
- agent/severity
- agent/weakness
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- collector/security-tracker-debian
- source/Debian
- agent/remedy
- agent/references
- agent/softwarecombine
- agent/tags
- agent/description
- agent/event
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/20.04
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/5.0
- version/redhat enterprise linux/6.0
- version/redhat enterprise linux/7.0
- version/redhat enterprise linux/8.0
- canonical/redhat enterprise mrg
- version/redhat enterprise mrg/2.0
- package-manager/debian