Description
An issue was discovered in fs/xfs/libxfs/xfs_inode_buf.c in the Linux kernel through 4.17.3. A denial of service (memory corruption and BUG) can occur for a corrupted xfs image upon encountering an inode that is in extent format, but has more extents than fit in the inode fork.
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 | 4.18.6-1 | — |
| Debian 13 | linux | 4.18.6-1 | — |
| Debian 12 | linux | 4.18.6-1 | — |
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-azure-fde | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-141.145 | USN-4907-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1098.105 | USN-4907-1 |
| Ubuntu 18.04 LTS | linux-azure | 4.18.0-1011.11~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1112.125 | USN-4907-1 |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1016.20 | USN-4907-1 |
| Ubuntu 18.04 LTS | linux-gcp | 5.0.0-1020.20~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1097.110 | USN-4907-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1089.91 | USN-4907-1 |
| Ubuntu 18.04 LTS | linux-oem +1 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1069.77 | USN-4907-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1083.88 | USN-4907-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1100.109 | USN-4907-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-208.240 | USN-4904-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1126.140 | USN-4904-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1098.105~16.04.1 | USN-4907-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1112.124~16.04.1 | USN-4907-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1097.110~16.04.1 | USN-4907-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-142.146~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1091.100 | USN-4904-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1069.77~16.04.1 | USN-4907-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1150.161 | USN-4904-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1154.164 | USN-4904-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2041.43 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2024.27 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1057.65 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1060.66 | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1090.94 | USN-4904-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1112.124~14.04.1 | USN-4907-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-208.240~14.04.1 | USN-4904-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-alt +1 | 4.14.0-115.8.1.el7a | RHSA-2019:1350 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1062.rt56.1022.el7 | RHSA-2019:2043 |
| RHEL 7 | perf +18 | 3.10.0-1062.el7 | RHSA-2019:2029, RHSA-2019:1350 |
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 | 4.12.14-25.19.1 | SUSE-SU-2018:2980-1 |
| SLES 12 SP3 | kernel-azure +3 | 4.4.155-4.16.1 | SUSE-SU-2018:2858-1 |
| SLES 12 SP3 | kernel-docs +4 | 4.4.155-94.50.1 | SUSE-SU-2018:2776-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.95.1 | SUSE-SU-2018:3084-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_25 | 1-3.4.1 | SUSE-SU-2018:3084-1 |
| SLES 12 SP2 | lttng-modules | 2.7.1-9.6.1 | SUSE-SU-2018:3084-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | kernel-azure +2 | 4.4.155-4.16.1 | SUSE-SU-2018:2858-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.155-94.50.1 | SUSE-SU-2018:2776-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.95.1 | SUSE-SU-2018:3084-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_25 | 1-3.4.1 | SUSE-SU-2018:3084-1 |
| SLES for SAP 12 SP2 | lttng-modules | 2.7.1-9.6.1 | SUSE-SU-2018:3084-1 |
| SLE Real Time 12 SP3 | kernel-rt +3 | 4.4.155-3.23.1 | SUSE-SU-2018:2862-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-25.19.1 | SUSE-SU-2018:2981-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_5 | 1-1.3.1 | SUSE-SU-2018:2981-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_17 | 1-4.3.1 | SUSE-SU-2018:2775-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.95.1 | SUSE-SU-2018:3084-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_25 | 1-3.4.1 | SUSE-SU-2018:3084-1 |
| SUSE OpenStack Cloud 7 | lttng-modules | 2.7.1-9.6.1 | SUSE-SU-2018:3084-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.95.1 | SUSE-SU-2018:3084-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_25 | 1-3.4.1 | SUSE-SU-2018:3084-1 |
| SUSE Enterprise Storage 4 | lttng-modules | 2.7.1-9.6.1 | SUSE-SU-2018:3084-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | perf +12 | 3.10.0-1062.el7 | ELSA-2019-2029 |
Advisories 15
- WID-SEC-2026-3896 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 13, 2026
- RHSA-2019:2043 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:2029 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:1350 Red Hat Security Advisory: kernel-alt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-4904-1 linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4907-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- SUSE-SU-2018:2981-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2775-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3084-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2980-1 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-2018:2858-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2776-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2862-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2019-2029 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
References
- https://bugzilla.kernel.org/show_bug.cgi?id=199915
- https://github.com/torvalds/linux/commit/23fcb3340d033d9f081e21e6c12c2db7eaa541d3
- https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=23fcb3340d033d9f081e21e6c12c2db7eaa541d3
- RHSA-2019:1350 vendor-advisory
- RHSA-2019:2043 vendor-advisory
- RHSA-2019:2029 vendor-advisory