Answer in brief
CVE-2025-22127 records a Medium severity (CVSS 5.5) vulnerability in f2fs: fix potential deadloop in prepare_compress_overwrite(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <7cd460bd9e7c6e6c30a33982603f65fb5deab1e4 || >=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <7215cf8ef54bdc9082dffac4662416d54961e258 || >=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <3147ee567dd9004a49826ddeaf0a4b12865d4409 | 7cd460bd9e7c6e6c30a33982603f65fb5deab1e4, 7215cf8ef54bdc9082dffac4662416d54961e258, 3147ee567dd9004a49826ddeaf0a4b12865d4409 |
| Linux/Linuxgeneric | 5.6 | Not reported |
| Linux/Linuxgeneric | >=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <4513843d58d8fa1daebd3817205a15309b146342 || >=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <7cd460bd9e7c6e6c30a33982603f65fb5deab1e4 || >=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <7215cf8ef54bdc9082dffac4662416d54961e258 || >=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <3147ee567dd9004a49826ddeaf0a4b12865d4409 | 4513843d58d8fa1daebd3817205a15309b146342, 7cd460bd9e7c6e6c30a33982603f65fb5deab1e4, 7215cf8ef54bdc9082dffac4662416d54961e258, 3147ee567dd9004a49826ddeaf0a4b12865d4409 |
Published upstream
Apr 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 7, 2026
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().
Quoted source text, attributed separately from HOL analysis.