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Fencer Vulns
high 7.8

CVE-2019-18675 json

The Linux kernel through 5.3.13 has a start_offset+size Integer Overflow in cpia2_remap_buffer in drivers/media/usb/cpia2/cpia2_core.c beca…

published 2019-11-25 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8391

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

The Linux kernel through 5.3.13 has a start_offset+size Integer Overflow in cpia2_remap_buffer in drivers/media/usb/cpia2/cpia2_core.c because cpia2 has its own mmap implementation. This allows local users (with /dev/video0 access) to obtain read and write permissions on kernel physical pages, which can possibly result in a privilege escalation.

Patch / fix

  • linux linux_kernel 3.16.60, 3.18.113, 4.4.137, 4.9.108, 4.14.49, 4.16.15
  • linux Debian 14, Debian 13, Debian 12 4.16.16-1

debian advisories DEBIAN-CVE-2019-18675

  • linux Ubuntu 16.04 LTS 4.4.0-134.160
  • linux Ubuntu 18.04 LTS 4.15.0-36.39
  • linux-aws Ubuntu 14.04 LTS 4.4.0-1028.31
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1066.76
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1023.23
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1021.22~16.04.1
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-36.39~16.04.1
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1032.38

ubuntu advisories UBUNTU-CVE-2019-18675

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

  • kernel-syms SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +1 more 4.4.121-92.129.1
  • kernel-source SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +1 more 4.4.121-92.129.1
  • kernel-default SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.129.1
  • kgraft-patch-SLE12-SP2_Update_34 SLES for SAP 12 SP2, SLES 12 SP2-LTSS, OpenStack Cloud 7 1-3.3.1
  • kernel-syms SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 4.4.180-94.116.1
  • kernel-source SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 4.4.180-94.116.1
  • kernel-default SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +5 more 4.4.180-94.116.1
  • kgraft-patch-SLE12-SP3_Update_31 SLES for SAP 12 SP3, SLES 12 SP3-LTSS, OpenStack Cloud Crowbar 8 +3 more 1-4.3.1

suse advisories SUSE-SU-2020:1255-1SUSE-SU-2020:1275-1SUSE-SU-2020:14354-1

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-2019-18675 updated cvss 6.7

kernel: integer overflow in cpia2_remap_buffer in drivers/media/usb/cpia2/cpia2_core.c

  • Red Hat Enterprise Linux 5 kernel
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more 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
    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

0.51% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • deshal3v.github.io https://deshal3v.github.io/blog/kernel-research/mmap_exploitation referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound
Technology feeds

References

Sources

Fencer Vulns 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.