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CVE-2018-7740

Published: 7 March 2018

The resv_map_release function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remap_file_pages system call.

From the Ubuntu Security Team

It was discovered that multiple integer overflows existed in the hugetlbfs implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash).

Notes

AuthorNote
sbeattie
045c7a3f tried to catch issues like this, but missed this case.
ff8c0c53c475 and 045c7a3f may also be needed for older
releases

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-15.16)
upstream
Released (4.16~rc7)
artful Ignored
(end of life)
cosmic Not vulnerable
(4.15.0-20.21)
disco Not vulnerable
(4.18.0-10.11)
trusty Ignored
(was needed ESM criteria)
xenial
Released (4.4.0-143.169)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by ff8c0c53c47530ffea82c22a0a6df6332b56c957
Introduced by

ff8c0c53c47530ffea82c22a0a6df6332b56c957

Fixed by 045c7a3f53d9403b62d396b6d051c4be5044cdb4
Introduced by

045c7a3f53d9403b62d396b6d051c4be5044cdb4

Fixed by 63489f8e821144000e0bdca7e65a8d1cc23a7ee7
linux-armadaxp
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-flo
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Ignored
(abandoned)
linux-goldfish
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
trusty Does not exist
(trusty was ignored [abandoned])
xenial Not vulnerable

artful Does not exist

cosmic Does not exist

disco Does not exist

linux-grouper
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
bionic Does not exist

artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.16~rc7)
xenial Does not exist

linux-aws
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1003.3)
upstream
Released (4.16~rc7)
artful Does not exist

cosmic Not vulnerable
(4.15.0-1007.7)
disco Not vulnerable
(4.18.0-1002.3)
trusty
Released (4.4.0-1039.42)
xenial
Released (4.4.0-1077.87)
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Not vulnerable
(4.15.0-1030.31~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1004.4)
upstream
Released (4.16~rc7)
artful Does not exist

cosmic Not vulnerable
(4.15.0-1009.9)
disco Not vulnerable
(4.18.0-1003.3)
trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
xenial
Released (4.15.0-1013.13~16.04.2)
linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1004.4)
upstream
Released (4.16~rc7)
cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial
Released (4.15.0-1013.13~16.04.2)
linux-euclid
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Ignored
(was needs-triage ESM criteria)
linux-gcp
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1003.3)
upstream
Released (4.16~rc7)
artful Does not exist

cosmic Not vulnerable
(4.15.0-1006.6)
disco Not vulnerable
(4.18.0-1002.3)
trusty Does not exist

xenial
Released (4.15.0-1014.14~16.04.1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.18.0-1004.5~18.04.1)
upstream
Released (4.16~rc7)
cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Does not exist

linux-gke
Launchpad, Ubuntu, Debian
bionic Not vulnerable

upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Not vulnerable

linux-hwe
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.18.0-13.14~18.04.1)
upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial
Released (4.15.0-24.26~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-14.15~18.04.1)
upstream
Released (4.16~rc7)
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial
Released (4.15.0-24.26~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1004.4)
upstream
Released (4.16~rc7)
artful Does not exist

cosmic Not vulnerable
(4.15.0-1008.8)
disco Not vulnerable
(4.18.0-1003.3)
trusty Does not exist

xenial
Released (4.4.0-1041.47)
linux-lts-quantal
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.16~rc7)
xenial Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.16~rc7)
xenial Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.16~rc7)
xenial Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.16~rc7)
xenial Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Ignored
(end of life, was ignored)
upstream
Released (4.16~rc7)
xenial Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Ignored
(end of life, was needs-triage)
upstream
Released (4.16~rc7)
xenial Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Ignored
(end of life, was ignored)
upstream
Released (4.16~rc7)
xenial Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty
Released (4.4.0-143.169~14.04.2)
upstream
Released (4.16~rc7)
xenial Does not exist

linux-maguro
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.16~rc7)
xenial Does not exist

linux-mako
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.16~rc7)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.16~rc7)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Not vulnerable
(4.15.0-1002.3)
cosmic Not vulnerable
(4.15.0-1004.5)
disco Not vulnerable
(4.15.0-1021.24)
trusty Does not exist

upstream
Released (4.16~rc7)
xenial Ignored
(end of standard support, was needed)
linux-oracle
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1007.9)
cosmic Not vulnerable
(4.15.0-1007.9)
disco Not vulnerable
(4.15.0-1007.9)
trusty Does not exist

upstream
Released (4.16~rc7)
xenial Not vulnerable
(4.15.0-1007.9~16.04.1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.16~rc7)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(4.15.0-1006.7)
cosmic Not vulnerable
(4.15.0-1010.11)
disco Not vulnerable
(4.18.0-1005.7)
trusty Does not exist

upstream
Released (4.16~rc7)
xenial
Released (4.4.0-1104.112)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic
Released (4.15.0-1053.57)
cosmic Does not exist

disco Not vulnerable
(5.0.0-1010.10)
trusty Does not exist

upstream
Released (4.16~rc7)
xenial
Released (4.4.0-1108.113)
linux-ti-omap4
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.16~rc7)
xenial Does not exist

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H