CVE-2025-21887
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up
In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up The issue was caused by dput(upper) being called before ovl_dentry_update_reval(), while upper->d_flags was still accessed in ovl_dentry_remote(). Move dput(upper) after its last use to prevent use-after-free. BUG: KASAN: slab-use-after-free in ovl_dentry_remote fs/overlayfs/util.c:162 [inline] BUG: KASAN: slab-use-after-free in ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 ovl_dentry_remote fs/overlayfs/util.c:162 [inline] ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 ovl_link_up fs/overlayfs/copy_up.c:610 [inline] ovl_copy_up_one+0x2105/0x3490 fs/overlayfs/copy_up.c:1170 ovl_copy_up_flags+0x18d/0x200 fs/overlayfs/copy_up.c:1223 ovl_rename+0x39e/0x18c0 fs/overlayfs/dir.c:1136 vfs_rename+0xf84/0x20a0 fs/namei.c:4893 ... </TASK>
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 714ba10a6dd19752a349e59aa875f3288ccb59b9 | affected | git | f77618291836168eca99e89cd175256f928f5e64 | Unavailable | None listed |
| 62f29ca45f832e281fc14966ac25f6ff3bd121ca | affected | git | 4b49d939b5a79117f939b77cc67efae2694d9799 | Unavailable | None listed |
| e4f2a1feebb3f209a0fca82aa53507a5b8be4d53 | affected | git | a7c41830ffcd17b2177a95a9b99b270302090c35 | Unavailable | None listed |
| b07d5cc93e1b28df47a72c519d09d0a836043613 | affected | git | 64455c8051c3aedc71abb7ec8d47c80301f99f00 | Unavailable | None listed |
| b07d5cc93e1b28df47a72c519d09d0a836043613 | affected | git | 3594aad97e7be2557ca9fa9c931b206b604028c8 | Unavailable | None listed |
| b07d5cc93e1b28df47a72c519d09d0a836043613 | affected | git | 60b4b5c1277fc491da9e1e7abab307bfa39c2db7 | Unavailable | None listed |
| b07d5cc93e1b28df47a72c519d09d0a836043613 | affected | git | c84e125fff2615b4d9c259e762596134eddd2f27 | Unavailable | None listed |
| 33ab4dd6202f359558a0a2678b94d1b9994c17e5 | affected | git | Unavailable | Unavailable | None listed |
| 1ecdc55e5cd9f70f8d7513802971d4cffb9f77af | affected | git | Unavailable | Unavailable | None listed |
| 5.10.188 | affected | semver | 5.10.247 | Unavailable | None listed |
| 5.15.121 | affected | semver | 5.15.179 | Unavailable | None listed |
| 6.1.39 | affected | semver | 6.1.130 | Unavailable | None listed |
| 6.3.13 | affected | semver | 6.4 | Unavailable | None listed |
| 6.4.4 | affected | semver | 6.5 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.5 | Unavailable | None listed |
| 5.10.247 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.179 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.130 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.81 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.18 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13.6 | unaffected | semver | Unavailable | 6.13.* | None listed |
| 6.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |