Out-of-bounds Read in Linux Kernel
CVE-2017-7558
A kernel data leak due to an out-of-bound read was found in the Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through version 4.13. A data leak happens when these functions fill in sockaddr data structures used to export socket's diagnostic information. As a result, up to 100 bytes of the slab data could be leaked to a userspace.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.036 (89.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.038 · newest: 0.036 · change: -0.001
Affected products
- Linux Kernel — versions 4.7-rc1 through 4.13
- Linux Kernel — versions 4.7
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- marc.info/ (mailing-list, Patch, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2918 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2931 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/100466 (VDB Entry, Third Party Advisory, vdb-entry)
- seclists.org/oss-sec/2017/q3/338 (mailing-list, Mailing List, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- www.securitytracker.com/id/1039221 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3981 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2930 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-7558?
- CVE-2017-7558 is a medium-severity vulnerability in Linux Kernel, classified under Out-of-bounds Read. CVSS score: 5.1/10. Published 2018-07-26.
- How severe is CVE-2017-7558?
- Medium severity. CVSS v3 base score is 5.1 out of 10.
- Is CVE-2017-7558 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.