CVE-2025-38677f2fs: fix to avoid out-of-boundary access in dnode page
- 7.8HighCVSS base score
- 0.18%Exploitation in 30 daysEPSS · top 92% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid out-of-boundary access in dnode page As Jiaming Zhang reported: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x1c1/0x2a0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x17e/0x800 mm/kasan/report.c:480 kasan_report+0x147/0x180 mm/kasan/report.c:593 data_blkaddr fs/f2fs/f2fs.h:3053 [inline] f2fs_data_blkaddr fs/f2fs/f2fs.h:3058 [inline] f2fs_get_dnode_of_data+0x1a09/0x1c40 fs/f2fs/node.c:855 f2fs_reserve_block+0x53/0x310 fs/f2fs/data.c:1195 prepare_write_begin fs/f2fs/data.c:3395 [inline] f2fs_write_begin+0xf39/0x2190 fs/f2fs/data.c:3594 generic_perform_write+0x2c7/0x910 mm/filemap.c:4112 f2fs_buffered_write_iter fs/f2fs/file.c:4988 [inline] f2fs_file_write_iter+0x1ec8/0x2410 fs/f2fs/file.c:5216 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x546/0xa90 fs/read_write.c:686 ksys_write+0x149/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x3d0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The root cause is in the corrupted image, there is a dnode has the same node id w/ its inode, so during f2fs_get_dnode_of_data(), it tries to access block address in dnode at offset 934, however it parses the dnode as inode node, so that get_dnode_addr() returns 360, then it tries to access page address from 360 + 934 * 4 = 4096 w/ 4 bytes. To fix this issue, let's add sanity check for node id of all direct nodes during f2fs_get_dnode_of_data().
Timeline
ID reserved
By Linux
- 5 months later
· 5 months later
Published
- 11 months later
· 11 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 92% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – < ee4d13f5407cbdf1216cc258f45492075713889a
- affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – < a650654365c57407413e9b1f6ff4d539bf2e99ca
- affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – < 6b7784ea07e6aa044f74b39d6b5af5e28746fc81
- affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – < 901f62efd6e855f93d8b1175540f29f4dc45ba55
- affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – < 92ef491b506a0f4dd971a3a76f86f2d8f5370180
- affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – < 888aa660144bcb6ec07839da756ee46bfcf7fc53
- affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – < f1d5093d9fe9f3c74c123741c88666cc853b79c5
- affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 – < 77de19b6867f2740cdcb6c9c7e50d522b47847a4
- affected 3.8
- unaffected < 3.8
- unaffected 5.4.297 – ≤ 5.4.*
- unaffected 5.10.241 – ≤ 5.10.*
- unaffected 5.15.190 – ≤ 5.15.*
- unaffected 6.1.149 – ≤ 6.1.*
- unaffected 6.6.103 – ≤ 6.6.*
- unaffected 6.12.44 – ≤ 6.12.*
- unaffected 6.16.4 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References11
- https://git.kernel.org/stable/c/ee4d13f5407cbdf1216cc258f45492075713889a (opens in a new tab)
- https://git.kernel.org/stable/c/a650654365c57407413e9b1f6ff4d539bf2e99ca (opens in a new tab)
- https://git.kernel.org/stable/c/6b7784ea07e6aa044f74b39d6b5af5e28746fc81 (opens in a new tab)
- https://git.kernel.org/stable/c/901f62efd6e855f93d8b1175540f29f4dc45ba55 (opens in a new tab)
- https://git.kernel.org/stable/c/92ef491b506a0f4dd971a3a76f86f2d8f5370180 (opens in a new tab)
- https://git.kernel.org/stable/c/888aa660144bcb6ec07839da756ee46bfcf7fc53 (opens in a new tab)
- https://git.kernel.org/stable/c/f1d5093d9fe9f3c74c123741c88666cc853b79c5 (opens in a new tab)
- https://git.kernel.org/stable/c/77de19b6867f2740cdcb6c9c7e50d522b47847a4 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-27938 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-38677)Record last updated .