Description
The madvise_willneed function in mm/madvise.c in the Linux kernel before 4.14.4 allows local users to cause a denial of service (infinite loop) by triggering use of MADVISE_WILLNEED for a DAX mapping.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.14.7-1 | — |
| Debian 13 | linux | 4.14.7-1 | — |
| Debian 12 | linux | 4.14.7-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-119.143 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1054.63 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.13.0-1018.21 | USN-3653-2 |
| Ubuntu 16.04 LTS | linux-gcp | 4.13.0-1017.21 | USN-3653-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-43.48~16.04.1 | USN-3653-2 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1020.25 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-oem | 4.13.0-1028.31 | USN-3653-2 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1086.94 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1088.93 | USN-3619-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-149.199 | USN-3655-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1016.16 | USN-3619-2 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-119.143~14.04.1 | USN-3619-2 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-alt +1 | 4.14.0-115.el7a | RHSA-2018:2948 |
| RHEL 7 | kernel-rt +10 | 3.10.0-957.rt56.910.el7 | RHSA-2018:3096 |
| RHEL 7 | perf +18 | 3.10.0-957.el7 | RHSA-2018:3083, RHSA-2018:2948 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.5 EUS | perf +18 | 3.10.0-862.44.2.el7 | RHSA-2019:3967 |
| RHEL 7.4 TUS | perf +12 | 3.10.0-693.61.1.el7 | RHSA-2019:4058 |
| RHEL 7.4 E4S | perf +14 | 3.10.0-693.61.1.el7 | RHSA-2019:4058 |
| RHEL 7.4 AUS | perf +12 | 3.10.0-693.61.1.el7 | RHSA-2019:4058 |
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-693.61.1.rt56.656.el6rt | RHSA-2019:4057 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-docs +4 | 4.4.120-94.17.1 | SUSE-SU-2018:0786-1 |
| SLES 12 SP2 | kernel-docs +4 | 4.4.120-92.70.1 | SUSE-SU-2018:0785-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.85.1 | SUSE-SU-2018:0848-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_26 | 1-2.3.1 | SUSE-SU-2018:0848-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.125.1 | SUSE-SU-2018:0848-1, SUSE-SU-2018:0834-1 |
| SLES 12 | kgraft-patch-SLE12_Update_33 | 1-1.3.1 | SUSE-SU-2018:0834-1 |
| SLES 11 SP4 | kernel-ec2 +9 | 3.0.101-108.38.1 | SUSE-SU-2018:1080-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.22.1 | SUSE-SU-2018:1172-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.120-94.17.1 | SUSE-SU-2018:0786-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.120-92.70.1 | SUSE-SU-2018:0785-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.85.1 | SUSE-SU-2018:0848-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_26 | 1-2.3.1 | SUSE-SU-2018:0848-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.38.1 | SUSE-SU-2018:1080-1 |
| SLE Real Time 12 SP3 | kernel-rt +3 | 4.4.120-3.8.1 | SUSE-SU-2018:0986-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.24.1 | SUSE-SU-2018:1309-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_10 | 1-4.3.1 | SUSE-SU-2018:0786-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_20 | 1-3.3.1 | SUSE-SU-2018:0785-1 |
| SUSE OpenStack Cloud 6 | kernel-xen +3 | 3.12.74-60.64.85.1 | SUSE-SU-2018:0848-1 |
| SUSE OpenStack Cloud 6 | kgraft-patch-SLE12-SP1_Update_26 | 1-2.3.1 | SUSE-SU-2018:0848-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.22.1 | SUSE-SU-2018:1172-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.28.6.el7uek | ELSA-2019-4710 |
| Oracle Linux 7 | perf +12 | 3.10.0-957.el7 | ELSA-2018-3083 |
Advisories 20
- RHSA-2019:3967 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jul 8, 2026
- RHSA-2018:3083 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 8, 2026
- RHSA-2018:3096 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 8, 2026
- RHSA-2018:2948 Red Hat Security Advisory: kernel-alt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:4058 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2019:4057 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3653-2 linux-hwe, linux-azure, linux-gcp, linux-oem vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3655-1 linux vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3619-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3619-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:1080-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0834-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0986-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1309-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1172-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0785-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:0786-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:0848-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2019-4710 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 10, 2019
- ELSA-2018-3083 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 5, 2018
References
- RHSA-2018:3083 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6ea8d958a2c95a1d514015d4e29ba21a8c0a1a91
- USN-3619-2 vendor-advisory
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.4
- RHSA-2018:2948 vendor-advisory
- USN-3653-2 vendor-advisory
- USN-3655-1 vendor-advisory
- USN-3655-2 vendor-advisory
- USN-3653-1 vendor-advisory
- USN-3657-1 vendor-advisory
- RHSA-2018:3096 vendor-advisory
- https://github.com/torvalds/linux/commit/6ea8d958a2c95a1d514015d4e29ba21a8c0a1a91
- USN-3619-1 vendor-advisory
- RHSA-2019:3967 vendor-advisory
- RHSA-2019:4058 vendor-advisory
- RHSA-2019:4057 vendor-advisory