CVE-2015-7837
medium
CVSS v3
5.5
CVSS v4 NEW
—
VIR risk
5.5
Description
The Linux kernel, as used in Red Hat Enterprise Linux 7, kernel-rt, and Enterprise MRG 2 and when booted with UEFI Secure Boot enabled, allows local users to bypass intended securelevel/secureboot restrictions by leveraging improper handling of secure_boot flag across kexec reboot.
Predictions
Exploit likelihood
55%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 4.5.1-1 |
| debian | bullseye | fixed | 4.5.1-1 |
| debian | forky | fixed | 4.5.1-1 |
| debian | sid | fixed | 4.5.1-1 |
| debian | trixie | fixed | 4.5.1-1 |
| rhel | 7.0 | affected | |
| rhel | 7.2 | affected | |
| rhel | 7.3 | affected | |
References
- http://rhn.redhat.com/errata/RHSA-2015-2152.html
- http://rhn.redhat.com/errata/RHSA-2015-2411.html
- http://www.openwall.com/lists/oss-security/2015/10/15/6
- http://www.securityfocus.com/bid/77097
- https://bugzilla.redhat.com/show_bug.cgi?id=1272472
- https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798
- https://security-tracker.debian.org/tracker/CVE-2015-7837
CWEs
CWE-254
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.