CVE-2016-0728 EXPLOIT
7.8
HIGH · CVSS 3.1 · EPSS 3.4% (pctl 89)
Patch early
A public exploit exists.
Description
The join_session_keyring function in security/keys/process_keys.c in the Linux kernel before 4.4.1 mishandles object references in a certain error case, which allows local users to gain privileges or cause a denial of service (integer overflow and use-after-free) via crafted keyctl commands.
Scoring
| CVSS | 7.8 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.44% — more likely to be exploited than 89% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2016-02-08 |
| Last modified | 2026-06-17 |
Affected (5)
| Vendor | Product |
|---|---|
| canonical | ubuntu linux |
| debian | debian linux |
| android | |
| hp | server migration pack |
| linux | linux kernel |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Linux Kernel 4.4.1 - REFCOUNT Overflow Use-After-Free in Keyrings Local Privilege Escalation (1) | 2016-01-19 |
| exploit-db | Linux Kernel 4.4.1 - REFCOUNT Overflow Use-After-Free in Keyrings Local Privilege Escalation (2) | 2016-01-19 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=23567fd052a9abb6d67fe8e7a9ccdd9800a540f2
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176194.html
- http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00041.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00045.html
- http://perception-point.io/2016/01/14/analysis-and-exploitation-of-a-linux-kernel-vulnerability-cve-2016-0728/
- http://rhn.redhat.com/errata/RHSA-2016-0064.html
- http://rhn.redhat.com/errata/RHSA-2016-0065.html
- http://rhn.redhat.com/errata/RHSA-2016-0068.html
- http://source.android.com/security/bulletin/2016-03-01.html
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