CVE-2025-22123

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-22123
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-22123.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-22123
Related
Published
2025-04-16T15:16:06Z
Modified
2025-04-17T22:54:42.613422Z
Summary
[none]
Details

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

f2fs: fix to avoid accessing uninitialized curseg

syzbot reports a f2fs bug as below:

F2FS-fs (loop3): Stopped filesystem due to reason: 7 kworker/u8:7: attempt to access beyond end of device BUG: unable to handle page fault for address: ffffed1604ea3dfa RIP: 0010:getckptvalidblocks fs/f2fs/segment.h:361 [inline] RIP: 0010:hascursegenoughspace fs/f2fs/segment.h:570 [inline] RIP: 0010:_getsecsrequired fs/f2fs/segment.h:620 [inline] RIP: 0010:hasnotenoughfreesecs fs/f2fs/segment.h:633 [inline] RIP: 0010:hasenoughfreesecs+0x575/0x1660 fs/f2fs/segment.h:649 <TASK> f2fsischeckpointready fs/f2fs/segment.h:671 [inline] f2fswriteinode+0x425/0x540 fs/f2fs/inode.c:791 writeinode fs/fs-writeback.c:1525 [inline] _writebacksingleinode+0x708/0x10d0 fs/fs-writeback.c:1745 writebacksbinodes+0x820/0x1360 fs/fs-writeback.c:1976 wbwriteback+0x413/0xb80 fs/fs-writeback.c:2156 wbdowriteback fs/fs-writeback.c:2303 [inline] wbworkfn+0x410/0x1080 fs/fs-writeback.c:2343 processonework kernel/workqueue.c:3236 [inline] processscheduledworks+0xa66/0x1840 kernel/workqueue.c:3317 workerthread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x7a9/0x920 kernel/kthread.c:464 retfromfork+0x4b/0x80 arch/x86/kernel/process.c:148 retfromforkasm+0x1a/0x30 arch/x86/entry/entry64.S:244

Commit 8b10d3653735 ("f2fs: introduce FAULTNOSEGMENT") allows to trigger no free segment fault in allocator, then it will update curseg->segno to NULLSEGNO, though, CPERRORFLAG has been set, f2fswrite_inode() missed to check the flag, and access invalid curseg->segno directly in below call path, then resulting in panic:

  • f2fswriteinode
    • f2fsischeckpointready
      • hasenoughfreesecs
        • hasnotenoughfreesecs
          • getsecsrequired
            • hascursegenoughspace
              • getckptvalidblocks : access invalid curseg->segno

To avoid this issue, let's: - check CPERRORFLAG flag in prior to f2fsischeckpointready() in f2fswriteinode(). - in hascursegenoughspace(), save curseg->segno into a temp variable, and verify its validation before use.

References

Affected packages

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
6.1.106-1
6.1.106-2
6.1.106-3
6.1.112-1
6.1.115-1
6.1.119-1
6.1.123-1
6.1.124-1
6.1.128-1
6.1.129-1
6.1.133-1
6.3.1-1~exp1
6.3.2-1~exp1
6.3.4-1~exp1
6.3.5-1~exp1
6.3.7-1~bpo12+1
6.3.7-1
6.3.11-1
6.4~rc6-1~exp1
6.4~rc7-1~exp1
6.4.1-1~exp1
6.4.4-1~bpo12+1
6.4.4-1
6.4.4-2
6.4.4-3~bpo12+1
6.4.4-3
6.4.11-1
6.4.13-1
6.5~rc4-1~exp1
6.5~rc6-1~exp1
6.5~rc7-1~exp1
6.5.1-1~exp1
6.5.3-1~bpo12+1
6.5.3-1
6.5.6-1
6.5.8-1
6.5.10-1~bpo12+1
6.5.10-1
6.5.13-1
6.6.3-1~exp1
6.6.4-1~exp1
6.6.7-1~exp1
6.6.8-1
6.6.9-1
6.6.11-1
6.6.13-1~bpo12+1
6.6.13-1
6.6.15-1
6.6.15-2
6.7-1~exp1
6.7.1-1~exp1
6.7.4-1~exp1
6.7.7-1
6.7.9-1
6.7.9-2
6.7.12-1~bpo12+1
6.7.12-1
6.8.9-1
6.8.11-1
6.8.12-1~bpo12+1
6.8.12-1
6.9.2-1~exp1
6.9.7-1~bpo12+1
6.9.7-1
6.9.8-1
6.9.9-1
6.9.10-1~bpo12+1
6.9.10-1
6.9.11-1
6.9.12-1
6.10-1~exp1
6.10.1-1~exp1
6.10.3-1
6.10.4-1
6.10.6-1~bpo12+1
6.10.6-1
6.10.7-1
6.10.9-1
6.10.11-1~bpo12+1
6.10.11-1
6.10.12-1
6.11~rc4-1~exp1
6.11~rc5-1~exp1
6.11-1~exp1
6.11.2-1
6.11.4-1
6.11.5-1~bpo12+1
6.11.5-1
6.11.6-1
6.11.7-1
6.11.9-1
6.11.10-1~bpo12+1
6.11.10-1
6.12~rc6-1~exp1
6.12.3-1
6.12.5-1
6.12.6-1
6.12.8-1
6.12.9-1~bpo12+1
6.12.9-1
6.12.9-1+alpha
6.12.10-1
6.12.11-1
6.12.11-1+alpha
6.12.11-1+alpha.1
6.12.12-1~bpo12+1
6.12.12-1
6.12.13-1
6.12.15-1
6.12.16-1
6.12.17-1
6.12.19-1
6.12.20-1
6.12.21-1
6.12.22-1
6.13~rc6-1~exp1
6.13~rc7-1~exp1
6.13.2-1~exp1
6.13.3-1~exp1
6.13.4-1~exp1
6.13.5-1~exp1
6.13.6-1~exp1
6.13.7-1~exp1
6.13.8-1~exp1
6.13.9-1~exp1
6.13.10-1~exp1
6.13.11-1~exp1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}