High · 7.1 CVE-2024-33847 EUVD-2024-34581GHSA-8wrm-f3cq-6c93

f2fs: compress: don't allow unaligned truncation on released compress inode

Published Jun 24, 2024 · Updated Oct 15, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-6.8 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-nvidia-tegra-5.15 Package: linux-nvidia-tegra-igx Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

f2fs: compress: don't allow unaligned truncation on released compress inode

f2fs image may be corrupted after below testcase:
- mkfs.f2fs -O extra_attr,compression -f /dev/vdb
- mount /dev/vdb /mnt/f2fs
- touch /mnt/f2fs/file
- f2fs_io setflags compression /mnt/f2fs/file
- dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4
- f2fs_io release_cblocks /mnt/f2fs/file
- truncate -s 8192 /mnt/f2fs/file
- umount /mnt/f2fs
- fsck.f2fs /dev/vdb

[ASSERT] (fsck_chk_inode_blk:1256) --> ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks
[FSCK] valid_block_count matching with CP [Fail] [0x4, 0x5]
[FSCK] other corrupted bugs [Fail]

The reason is: partial truncation assume compressed inode has reserved
blocks, after partial truncation, valid block count may change w/o
.i_blocks and .total_valid_block_count update, result in corruption.

This patch only allow cluster size aligned truncation on released
compress inode for fixing.

Affected products

Vendor	Product	Affected	Fixed
Linux	Linux	5.14	5.15.161

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	6.9.7-1	—
Debian 13	linux	6.9.7-1	—
Debian 12	linux	6.1.94-1	—
Debian 11	linux	5.10.221-1	DSA-5730-1

Ubuntu

Security tracker ↗

Release	Package	Fixed in	Advisory
Ubuntu Nvidia-BlueField 22.04 LTS	linux-bluefield	5.15.0-1052.54	—
Ubuntu 24.04 LTS	linux	6.8.0-44.44	USN-6999-1
Ubuntu 24.04 LTS	linux-aws	6.8.0-1015.16	USN-6999-1
Ubuntu 24.04 LTS	linux-gcp +1	6.8.0-1014.16	USN-7004-1, USN-6999-1
Ubuntu 24.04 LTS	linux-gke	6.8.0-1010.13	USN-6999-1
Ubuntu 24.04 LTS	linux-ibm +2	6.8.0-1012.12	USN-6999-1
Ubuntu 24.04 LTS	linux-nvidia	6.8.0-1013.14	USN-7005-1
Ubuntu 24.04 LTS	linux-nvidia-lowlatency	6.8.0-1013.14.1	USN-7005-1
Ubuntu 24.04 LTS	linux-raspi	6.8.0-1011.12	USN-6999-2
Ubuntu 24.04 LTS	linux-riscv +1	6.8.0-44.44.1	USN-6999-1
Ubuntu 22.04 LTS	linux +1	5.15.0-121.131	USN-7007-3, USN-7007-1
Ubuntu 22.04 LTS	linux-aws	5.15.0-1069.75	USN-7007-1
Ubuntu 22.04 LTS	linux-aws-6.8	6.8.0-1015.16~22.04.1	—
Ubuntu 22.04 LTS	linux-azure	5.15.0-1072.81	USN-7009-1
Ubuntu 22.04 LTS	linux-azure-fde	5.15.0-1072.81.1	USN-7009-1
Ubuntu 22.04 LTS	linux-gcp	5.15.0-1068.76	USN-7007-1
Ubuntu 22.04 LTS	linux-gcp-6.8 +1	6.8.0-1014.16~22.04.1	—
Ubuntu 22.04 LTS	linux-gke	5.15.0-1066.72	USN-7007-1
Ubuntu 22.04 LTS	linux-gkeop	5.15.0-1052.59	USN-7007-1
Ubuntu 22.04 LTS	linux-hwe-6.8	6.8.0-45.45~22.04.1	USN-7029-1
Ubuntu 22.04 LTS	linux-ibm +1	5.15.0-1062.65	USN-7007-1
Ubuntu 22.04 LTS	linux-ibm-6.8 +1	6.8.0-1012.12~22.04.1	—
Ubuntu 22.04 LTS	linux-intel-iotg	5.15.0-1064.70	USN-7007-1
Ubuntu 22.04 LTS	linux-kvm	5.15.0-1066.71	USN-7007-1
Ubuntu 22.04 LTS	linux-nvidia	5.15.0-1064.65	USN-7007-1
Ubuntu 22.04 LTS	linux-nvidia-6.8	6.8.0-1013.14~22.04.1	USN-7005-2
Ubuntu 22.04 LTS	linux-nvidia-tegra	5.15.0-1028.28	—
Ubuntu 22.04 LTS	linux-nvidia-tegra-igx	5.15.0-1016.16	—
Ubuntu 22.04 LTS	linux-oracle	5.15.0-1067.73	USN-7007-1
Ubuntu 22.04 LTS	linux-riscv +31	No fix yet	—
Ubuntu 22.04 LTS	linux-riscv-6.8 +1	6.8.0-44.44.1~22.04.1	USN-7008-1
Ubuntu 22.04 LTS	linux-xilinx-zynqmp	5.15.0-1035.39	USN-7019-1
Ubuntu 20.04 LTS	linux-aws-5.15	5.15.0-1069.75~20.04.1	USN-7007-1
Ubuntu 20.04 LTS	linux-azure-5.15	5.15.0-1072.81~20.04.1	USN-7009-1
Ubuntu 20.04 LTS	linux-azure-fde-5.15	5.15.0-1072.81~20.04.1.1	USN-7009-2
Ubuntu 20.04 LTS	linux-gcp-5.15	5.15.0-1068.76~20.04.1	USN-7007-1
Ubuntu 20.04 LTS	linux-gke +26	No fix yet	—
Ubuntu 20.04 LTS	linux-gkeop-5.15	5.15.0-1052.59~20.04.1	USN-7007-1
Ubuntu 20.04 LTS	linux-hwe-5.15 +1	5.15.0-121.131~20.04.1	USN-7007-3, USN-7007-1
Ubuntu 20.04 LTS	linux-ibm-5.15	5.15.0-1062.65~20.04.1	USN-7007-2
Ubuntu 20.04 LTS	linux-intel-iotg-5.15	5.15.0-1064.70~20.04.1	USN-7007-1
Ubuntu 20.04 LTS	linux-nvidia-tegra-5.15	5.15.0-1030.30~20.04.1	—
Ubuntu 20.04 LTS	linux-oracle-5.15	5.15.0-1067.73~20.04.1	USN-7007-2
Ubuntu 20.04 LTS	linux-riscv-5.15	5.15.0-1065.69~20.04.1	—
Ubuntu 18.04 LTS	linux-gcp +13	No fix yet	—

Show 6 more (older releases, extended support, other products)

Release	Package	Fixed in	Advisory
Ubuntu 16.04 LTS	linux-hwe-edge	No fix yet	—
Ubuntu Pro Realtime 24.04 LTS	linux-raspi-realtime	6.8.0-2010.10	—
Ubuntu Pro Realtime 24.04 LTS	linux-realtime	6.8.1-1008.8	—
Ubuntu Pro Realtime 22.04 LTS	linux-intel-iot-realtime	5.15.0-1063.65	—
Ubuntu Pro Realtime 22.04 LTS	linux-realtime	5.15.0-1070.78	—
Ubuntu Pro Realtime 22.04 LTS	linux-realtime-6.8	6.8.1-1008.8~22.04.1	—
Ubuntu Pro FIPS-updates 24.04 LTS	linux-fips	6.8.0-78.78+fips1	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-aws-fips	5.15.0-1069.75+fips1	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-azure-fips	5.15.0-1072.81+fips1	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-fips	5.15.0-121.131+fips1	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-gcp-fips	5.15.0-1068.76+fips1	—
Ubuntu Pro FIPS-preview 22.04 LTS	linux-fips +3	No fix yet	—

Advisories 17

USN-7007-1 linux, linux-aws, linux-aws-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-ibm, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-nvidia, linux-oracle, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-6999-1 linux, linux-aws, linux-gcp, linux-gke, linux-ibm, linux-lowlatency, linux-oem-6.8, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7009-1 linux-azure, linux-azure-5.15, linux-azure-fde vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7007-3 linux-lowlatency, linux-lowlatency-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7029-1 linux-hwe-6.8 Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7005-1 linux-nvidia, linux-nvidia-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7004-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7005-2 linux-nvidia-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7008-1 linux-lowlatency-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7019-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-6999-2 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-7007-2 linux-ibm-5.15, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
SSA-265688 SSA-265688: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP V1.1 Siemens ProductCERT · Oct 13, 2026
USN-7009-2 linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Aug 6, 2026
ICSA-24-102-01 Siemens SIMATIC S7-1500 TM MFP CISA ICS & IT advisories · May 14, 2026
DSA-5730-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
WID-SEC-2024-1443 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Feb 15, 2026

References