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Vulnerability · Published Apr 16, 2025 · Assigned by Linux

CVE-2025-22127f2fs: fix potential deadloop in prepare_compress_overwrite()

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 91.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix potential deadloop in prepare_compress_overwrite() Jan Prusakowski reported a kernel hang issue as below: When running xfstests on linux-next kernel (6.14.0-rc3, 6.12) I encountered a problem in generic/475 test where fsstress process gets blocked in __f2fs_write_data_pages() and the test hangs. The options I used are: MKFS_OPTIONS -- -O compression -O extra_attr -O project_quota -O quota /dev/vdc MOUNT_OPTIONS -- -o acl,user_xattr -o discard,compress_extension=* /dev/vdc /vdc INFO: task kworker/u8:0:11 blocked for more than 122 seconds. Not tainted 6.14.0-rc3-xfstests-lockdep #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:0 state:D stack:0 pid:11 tgid:11 ppid:2 task_flags:0x4208160 flags:0x00004000 Workqueue: writeback wb_workfn (flush-253:0) Call Trace: <TASK> __schedule+0x309/0x8e0 schedule+0x3a/0x100 schedule_preempt_disabled+0x15/0x30 __mutex_lock+0x59a/0xdb0 __f2fs_write_data_pages+0x3ac/0x400 do_writepages+0xe8/0x290 __writeback_single_inode+0x5c/0x360 writeback_sb_inodes+0x22f/0x570 wb_writeback+0xb0/0x410 wb_do_writeback+0x47/0x2f0 wb_workfn+0x5a/0x1c0 process_one_work+0x223/0x5b0 worker_thread+0x1d5/0x3c0 kthread+0xfd/0x230 ret_from_fork+0x31/0x50 ret_from_fork_asm+0x1a/0x30 </TASK> The root cause is: once generic/475 starts toload error table to dm device, f2fs_prepare_compress_overwrite() will loop reading compressed cluster pages due to IO error, meanwhile it has held .writepages lock, it can block all other writeback tasks. Let's fix this issue w/ below changes: - add f2fs_handle_page_eio() in prepare_compress_overwrite() to detect IO error. - detect cp_error earler in f2fs_read_multi_pages().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2025-22127
Debian:13linux6.12.111-1DEBIAN-CVE-2025-22127
Debian:14linux6.16.3-1DEBIAN-CVE-2025-22127
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2025-22127
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2025-22127
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2025-22127
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-22127

Affected products (as reported)

VendorProductVersions
Linux Linux 4c8ff7095bef64fc47e996a938f7d57f9e077da3 – before 353b262268c1646a0e7c96d4ed14c5d72a30ccb44c8ff7095bef64fc47e996a938f7d57f9e077da3 – before 4513843d58d8fa1daebd3817205a15309b1463424c8ff7095bef64fc47e996a938f7d57f9e077da3 – before 7cd460bd9e7c6e6c30a33982603f65fb5deab1e44c8ff7095bef64fc47e996a938f7d57f9e077da3 – before 7215cf8ef54bdc9082dffac4662416d54961e2584c8ff7095bef64fc47e996a938f7d57f9e077da3 – before 3147ee567dd9004a49826ddeaf0a4b12865d4409
Linux Linux 5.6

References