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Fencer Intel
medium 5.5

CVE-2017-18550 json

An issue was discovered in drivers/scsi/aacraid/commctrl.c in the Linux kernel before 4.13.

published 2019-08-19 7 y ago modified 2026-06-17 4 mo ago also EUVD-2017-9666

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

An issue was discovered in drivers/scsi/aacraid/commctrl.c in the Linux kernel before 4.13. There is potential exposure of kernel stack memory because aac_get_hba_info does not initialize the hbainfo structure.

Patch / fix

  • linux linux_kernel 4.13
  • linux Debian 14, Debian 13, Debian 12 4.13.4-1

debian advisories DEBIAN-CVE-2017-18550

  • linux-gcp Ubuntu 16.04 LTS 4.13.0-1002.5
  • linux-hwe Ubuntu 16.04 LTS 4.13.0-32.35~16.04.1
  • linux-azure Ubuntu 16.04 LTS 4.13.0-1005.7

ubuntu advisories UBUNTU-CVE-2017-18550

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-18550 updated cvss 5.5

kernel: information exposure in drivers/scsi/aacraid/commctrl.c

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: workaround, no fix planned “There is no known mitigation to this flaw, preventing users being able to issue an ioctl to this device by removing the relevant permissions to do so will limit the information exposure.”
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.