Buffer overflow in Linux Kernel
CVE-2018-1091
In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (32.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: -0.000
Affected products
- Linux Kernel
- Linux Kernel V4.13 And Newer — versions Linux kernel v4.13 and newer
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 (Patch, Vendor Advisory)
- marc.info/ (Patch, Third Party Advisory)
- access.redhat.com/security/cve/cve-2018-1091 (Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1318 (vendor-advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70 (Patch, Third Party Advisory)
- openwall.com/lists/oss-security/2018/03/27/4 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-1091?
- CVE-2018-1091 is a medium-severity vulnerability in Linux Kernel, classified under CWE-391. CVSS score: 5.5/10. Published 2018-03-27.
- How severe is CVE-2018-1091?
- Medium severity. CVSS v3 base score is 5.5 out of 10.