CVE-2026-89983
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
i2c: core: fix debugfs UAF on adapter removal
In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix debugfs UAF on adapter removal i2c_del_adapter() frees the adapter's debugfs directory before it unregisters the adapter device, but the new_device sysfs attribute stays writable until device_del(). A write racing with removal still reaches i2c_device_probe(), which passes the freed adap->debugfs to debugfs_create_dir() as the new client's parent: BUG: KASAN: slab-use-after-free in lookup_noperm_common+0x407/0x430 Read of size 4 at addr ffff88803ef87810 by task syz.0.61/6090 lookup_noperm_common+0x407/0x430 simple_start_creating+0x9c/0x110 debugfs_start_creating+0xdb/0x1a0 debugfs_create_dir+0x24/0x350 i2c_device_probe+0x814/0xbf0 It's technically possible to create a client after i2c_deregister_clients has run. That client will never be unregistered and make wait_for_completion hang. Close the window by removing the new_device attribute at the start of i2c_del_adapter(). device_remove_file() will drain any clients left.
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) |
|---|---|---|---|---|---|
| 0e8926abfd7aee220e44be5566affd7a8580b50e | affected | git | dc33a9762538b3250ed6b5644a4d44c748be33a6 | Unavailable | None listed |
| e2a268b0f512fb18ae5961b1fdfaf610ed6bd661 | affected | git | 1f1bcd4eca6caa3e4258d9a31925112539406eb6 | Unavailable | None listed |
| 4a2be5a72865bdd219b2d8c327b9fa03e87a4a9e | affected | git | f9094ace03e0a532cc6505d2e97b61ae738da4ed | Unavailable | None listed |
| 73febd775bdbdb98c81255ff85773ac410ded5c4 | affected | git | 643fb872aa04342d27dbef52b2b3cf3fe71b2c7b | Unavailable | None listed |
| 73febd775bdbdb98c81255ff85773ac410ded5c4 | affected | git | 112b3d48084c820bbccf41d9783fd122e3ac4cb0 | Unavailable | None listed |
| 73febd775bdbdb98c81255ff85773ac410ded5c4 | affected | git | 552836be2d95c688eede6371f85532abe1a71232 | Unavailable | None listed |
| 73febd775bdbdb98c81255ff85773ac410ded5c4 | affected | git | b15b548d52b43ba8ac4652bc2c7244a8dd1e9622 | Unavailable | None listed |
| 5.15.168 | affected | semver | 5.15.221 | Unavailable | None listed |
| 6.1.113 | affected | semver | 6.1.188 | Unavailable | None listed |
| 6.6.55 | affected | semver | 6.6.157 | 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) |
|---|---|---|---|---|---|
| 6.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.8 | Unavailable | None listed |
| 5.15.221 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.110 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.51 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.5 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |