Description
In the Linux kernel, the following vulnerability has been resolved:
erofs: fix lz4 inplace decompression
Currently EROFS can map another compressed buffer for inplace
decompression, that was used to handle the cases that some pages of
compressed data are actually not in-place I/O.
However, like most simple LZ77 algorithms, LZ4 expects the compressed
data is arranged at the end of the decompressed buffer and it
explicitly uses memmove() to handle overlapping:
__________________________________________________________
|_ direction of decompression --> ____ |_ compressed data _|
Although EROFS arranges compressed data like this, it typically maps two
individual virtual buffers so the relative order is uncertain.
Previously, it was hardly observed since LZ4 only uses memmove() for
short overlapped literals and x86/arm64 memmove implementations seem to
completely cover it up and they don't have this issue. Juhyung reported
that EROFS data corruption can be found on a new Intel x86 processor.
After some analysis, it seems that recent x86 processors with the new
FSRM feature expose this issue with "rep movsb".
Let's strictly use the decompressed buffer for lz4 inplace
decompression for now. Later, as an useful improvement, we could try
to tie up these two buffers together in the correct order.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.3 | 5.4.285 |
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 | 6.6.15-1 | — |
| Debian 13 | linux | 6.6.15-1 | — |
| Debian 12 | linux | 6.1.76-1 | — |
| Debian 11 | linux | 5.10.216-1 | DSA-5681-1 |
| Debian 10 | linux-5.10 | 5.10.216-1~deb10u1 | DLA-3842-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1044.46 | — |
| Ubuntu 22.04 LTS | linux | 5.15.0-112.122 | USN-6820-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1063.69 | USN-6821-3 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1066.75 | USN-6821-4 |
| Ubuntu 22.04 LTS | linux-azure-6.5 | 6.5.0-1022.23~22.04.1 | USN-6819-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1067.76.1 | USN-6821-4 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1062.70 | USN-6820-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.5 | 6.5.0-1022.24~22.04.1 | USN-6818-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1060.66 | USN-6821-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1046.53 | USN-6821-2 |
| Ubuntu 22.04 LTS | linux-hwe-6.5 | 6.5.0-41.41~22.04.2 | USN-6818-4 |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1056.59 | USN-6821-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1058.64 | USN-6821-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1060.65 | USN-6821-2 |
| Ubuntu 22.04 LTS | linux-lowlatency | 5.15.0-110.120 | USN-6820-1 |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-6.5 | 6.5.0-41.41.1~22.04.1 | USN-6818-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1058.59 | USN-6820-2 |
| Ubuntu 22.04 LTS | linux-nvidia-6.5 | 6.5.0-1021.22 | USN-6818-3 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1026.26 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1015.15 | — |
| Ubuntu 22.04 LTS | linux-oem-6.5 | 6.5.0-1024.25 | USN-6819-3 |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1061.67 | USN-6821-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.5 | 6.5.0-1024.24~22.04.1 | USN-6819-4 |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1058.61 | USN-6919-1 |
| Ubuntu 22.04 LTS | linux-riscv +22 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.5 | 6.5.0-40.40.1~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-starfive-6.5 | 6.5.0-1015.16~22.04.1 | USN-6819-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1030.34 | USN-6820-1 |
| Ubuntu 20.04 LTS | linux | 5.4.0-202.222 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1136.146 | USN-7159-2 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1063.69~20.04.1 | USN-6821-3 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1142.149 | USN-7195-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1065.74~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1096.103 | USN-7159-3 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1140.149 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1062.70~20.04.1 | USN-6820-1 |
| Ubuntu 20.04 LTS | linux-gke +27 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1046.53~20.04.1 | USN-6821-2 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-113.123~20.04.1 | USN-6871-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1083.88 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1057.60~20.04.1 | USN-6892-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1058.64~20.04.1 | USN-6828-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1045.46 | USN-7159-4 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1124.132 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-110.120~20.04.1 | USN-6820-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1027.27~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1135.144 | USN-7159-3 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1061.67~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1120.132 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1059.63~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1055.59 | USN-7159-1 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2001.1 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1056.58 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1064.72 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1063.69+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1065.74+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-111.121+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1062.70+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1136.146+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1142.149+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1110.120 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1140.149+fips1 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1136.146~18.04.1 | USN-7159-2 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1142.149~18.04.1 | USN-7195-2 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1140.149~18.04.1 | USN-7159-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-202.222~18.04.1 | USN-7159-1 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1083.88~18.04.1 | USN-7159-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1135.144~18.04.1 | USN-7159-3 |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1120.132~18.04.1 | USN-7159-5 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.59.1 | SUSE-SU-2024:1480-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.48.1 | SUSE-SU-2024:1490-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.59.1.150500.6.25.7 | SUSE-SU-2024:1480-1 |
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
| SLES for SAP 15 SP4 | kernel-docs +4 | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| SLE Micro 5.5 | kernel-default | 5.14.21-150500.55.59.1 | SUSE-SU-2024:1480-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.59.1.150500.6.25.7 | SUSE-SU-2024:1480-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.47.1 | SUSE-SU-2024:1466-1 |
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
| SLE Micro 5.4 | kernel-rt +1 | 5.14.21-150400.15.76.1 | SUSE-SU-2024:1320-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
| SLE Micro 5.3 | kernel-rt +1 | 5.14.21-150400.15.76.1 | SUSE-SU-2024:1320-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.59.1 | SUSE-SU-2024:1480-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_13 | 1-150500.11.3.1 | SUSE-SU-2024:1466-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_12 | 1-150500.11.7.1 | SUSE-SU-2024:1480-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_25 | 1-150400.9.5.1 | SUSE-SU-2024:1321-1 |
| SLE HPC 15 SP4 | kernel-64kb +5 | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| SLE HPC 15 SP4 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.47.1 | SUSE-SU-2024:1466-1 |
| SUSE Manager Server 4.3 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
| SUSE Manager Server 4.3 | kernel-syms +3 | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| SUSE Manager Proxy 4.3 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
| SUSE Manager Proxy 4.3 | kernel-syms +2 | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | dtb-aarch64 +10 | 5.14.21-150500.55.59.1 | SUSE-SU-2024:1480-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.48.1 | SUSE-SU-2024:1490-1 |
| openSUSE Leap 15.5 | kernel-default-base | 5.14.21-150500.55.59.1.150500.6.25.7 | SUSE-SU-2024:1480-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.47.1 | SUSE-SU-2024:1466-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | kernel-default | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| openSUSE Leap Micro 5.4 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
| openSUSE Leap Micro 5.4 | kernel-rt | 5.14.21-150400.15.76.1 | SUSE-SU-2024:1320-1 |
| openSUSE Leap Micro 5.3 | kernel-default | 5.14.21-150400.24.116.1 | SUSE-SU-2024:1321-1 |
| openSUSE Leap Micro 5.3 | kernel-default-base | 5.14.21-150400.24.116.1.150400.24.54.5 | SUSE-SU-2024:1321-1 |
| openSUSE Leap Micro 5.3 | kernel-rt | 5.14.21-150400.15.76.1 | SUSE-SU-2024:1320-1 |
Advisories 31
- USN-6819-4 linux-oracle-6.5 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6818-3 linux-nvidia-6.5 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6819-3 linux-oem-6.5 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6818-1 linux, linux-gcp, linux-gcp-6.5, linux-lowlatency, linux-lowlatency-hwe-6.5, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6818-4 linux-hwe-6.5 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6819-1 linux-azure, linux-azure-6.5, linux-starfive, linux-starfive-6.5 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7195-2 linux-azure-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-3 linux-bluefield, linux-oracle, linux-oracle-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-1 linux, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-raspi, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-6828-1 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-5 linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7195-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-2 linux-aws, linux-aws-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-4 linux-iot vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-6919-1 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6821-4 linux-azure, linux-azure-fde vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6871-1 linux-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6820-1 linux, linux-gcp, linux-gcp-5.15, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6821-1 linux-gke, linux-ibm, linux-intel-iotg, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6821-2 linux-gkeop, linux-gkeop-5.15, linux-kvm vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6821-3 linux-aws, linux-aws-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6892-1 linux-ibm-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6820-2 linux-nvidia vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- WID-SEC-2024-0527 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 4, 2026
- DSA-5681-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3842-1 linux-5.10 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2024:1320-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1480-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1490-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1466-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1321-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
References
- https://git.kernel.org/stable/c/9ff2d260b25df6fe1341a79113d88fecf6bd553e
- https://git.kernel.org/stable/c/a0180e940cf1aefa7d516e20b259ad34f7a8b379
- https://git.kernel.org/stable/c/77cbc04a1a8610e303a0e0d74f2676667876a184
- https://git.kernel.org/stable/c/33bf23c9940dbd3a22aad7f0cda4c84ed5701847
- https://git.kernel.org/stable/c/f36d200a80a3ca025532ed60dd1ac21b620e14ae
- https://git.kernel.org/stable/c/bffc4cc334c5bb31ded54bc3cfd651735a3cb79e
- https://git.kernel.org/stable/c/3c12466b6b7bf1e56f9b32c366a3d83d87afb4de