Description
In the Linux kernel 4.14.x, 4.15.x, 4.16.x, 4.17.x, and 4.18.x before 4.18.13, faulty computation of numeric bounds in the BPF verifier permits out-of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandles 32-bit right shifts.
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 | 4.18.20-1 | — |
| Debian 13 | linux | 4.18.20-1 | — |
| Debian 12 | linux | 4.18.20-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | linux | 4.15.0-43.46 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1031.33 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-azure | 4.15.0-1036.38 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-gcp | 4.15.0-1026.27 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1028.28 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1030.35 | USN-3847-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1030.32 | USN-3847-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1031.33~16.04.1 | USN-3847-2 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1036.38~16.04.1 | USN-3847-2 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1026.27~16.04.1 | USN-3847-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-43.46~16.04.1 | USN-3847-2 |
| Ubuntu 14.04 LTS | linux-azure | 4.15.0-1036.38~14.04.2 | USN-3847-3 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-957.10.1.rt56.921.el7 | RHSA-2019:0514 |
| RHEL 7 | perf +19 | 3.10.0-957.10.1.el7 | RHSA-2019:0512 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | kernel-azure +2 | 4.12.14-5.16.1 | SUSE-SU-2018:3961-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-25.25.1 | SUSE-SU-2018:3589-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.3.1 | SUSE-SU-2018:3934-1 |
| SLES 12 SP4 | kernel-docs +3 | 4.12.14-95.3.1 | SUSE-SU-2018:4069-1 |
| SLES 12 SP4 | kernel-obs-build | 4.12.14-95.3.2 | SUSE-SU-2018:4069-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.3.1 | SUSE-SU-2018:3934-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.3.1 | SUSE-SU-2018:4069-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-25.25.1 | SUSE-SU-2018:3593-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_7 | 1-1.3.1 | SUSE-SU-2018:3593-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_1 | 1-7.1 | SUSE-SU-2018:4072-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | perf +12 | 3.10.0-957.10.1.el7 | ELSA-2019-0512 |
Advisories 12
- RHSA-2019:0512 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2019:0514 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3847-1 linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3847-2 linux-hwe, linux-aws-hwe, linux-azure, linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3847-3 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:3593-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3589-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3961-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4072-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3934-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4069-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2019-0512 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 13, 2019
References
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.13
- USN-3847-1 vendor-advisory
- USN-3835-1 vendor-advisory
- RHSA-2019:0512 vendor-advisory
- USN-3847-2 vendor-advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.75
- USN-3832-1 vendor-advisory
- https://github.com/torvalds/linux/commit/b799207e1e1816b09e7a5920fbb2d5fcf6edd681
- USN-3847-3 vendor-advisory
- RHSA-2019:0514 vendor-advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1686
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b799207e1e1816b09e7a5920fbb2d5fcf6edd681
- https://support.f5.com/csp/article/K38456756