CVE-2020-25656: Use After Free
First published: Thu Oct 15 2020(Updated: )
A flaw was found in Linux Kernel, where a race in KDGKBSENT and KDSKBSENT leads to use-after-free read in vt_do_kdgkb_ioctl References: <a href="https://groups.google.com/g/syzkaller-bugs/c/kZsmxkpq3UI/m/J35PFexWBgAJ?pli=1">https://groups.google.com/g/syzkaller-bugs/c/kZsmxkpq3UI/m/J35PFexWBgAJ?pli=1</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.21.1.rt56.1158.el7 | 0:3.10.0-1160.21.1.rt56.1158.el7 |
| redhat/kernel | <0:3.10.0-1160.21.1.el7 | 0:3.10.0-1160.21.1.el7 |
| Linux Linux kernel | <5.10 | |
| Linux Linux kernel | =5.10-rc1 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build12533 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build12658 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build12859 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build13170 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build13586 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build13861 | |
| redhat/kernel | <5.10 | 5.10 |
| 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 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-25656 https://nvd.nist.gov/vuln/detail/CVE-2020-25656 https://lkml.org/lkml/2020/10/16/84 https://lkml.org/lkml/2020/10/29/528
- https://bugzilla.redhat.com/show_bug.cgi?id=1888726
- https://access.redhat.com/errata/RHSA-2021:0857
- https://access.redhat.com/errata/RHSA-2021:0856
- https://access.redhat.com/security/cve/cve-2020-25656
- https://lkml.org/lkml/2020/10/16/84
- https://lkml.org/lkml/2020/10/29/528
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
- https://www.starwindsoftware.com/security/sw-20210325-0006/
- https://launchpad.net/bugs/cve/CVE-2020-25656
- https://groups.google.com/g/syzkaller-bugs/c/kZsmxkpq3UI/m/J35PFexWBgAJ?pli=1
- https://www.openwall.com/lists/oss-security/2020/10/16/1
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/tty/vt/keyboard.c?id=6ca03f90527e499dd5e32d6522909e2ad390896b
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/tty/vt/keyboard.c?id=82e61c3909db51d91b9d3e2071557b6435018b80
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1897134
- https://access.redhat.com/errata/RHSA-2024:2950
- https://access.redhat.com/errata/RHSA-2024:3138
- https://security-tracker.debian.org/tracker/CVE-2020-25656
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25656
- https://nvd.nist.gov/vuln/detail/CVE-2020-25656
- https://ubuntu.com/security/CVE-2020-25656
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- version/starwindsoftware starwind virtual san vsphere/v8-build12658
- version/starwindsoftware starwind virtual san vsphere/v8-build12859
- version/starwindsoftware starwind virtual san vsphere/v8-build13170
- version/starwindsoftware starwind virtual san vsphere/v8-build13586
- version/starwindsoftware starwind virtual san vsphere/v8-build13861
- package-manager/debian