Answer in brief
CVE-2026-89983 records a Unknown severity vulnerability in i2c: core: fix debugfs UAF on adapter removal. The current sources do not mark it as known exploited. The current feed maps 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.
A CVSS score is not reported in the current record. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0e8926abfd7aee220e44be5566affd7a8580b50e <dc33a9762538b3250ed6b5644a4d44c748be33a6 || >=e2a268b0f512fb18ae5961b1fdfaf610ed6bd661 <1f1bcd4eca6caa3e4258d9a31925112539406eb6 || >=4a2be5a72865bdd219b2d8c327b9fa03e87a4a9e <f9094ace03e0a532cc6505d2e97b61ae738da4ed || >=73febd775bdbdb98c81255ff85773ac410ded5c4 <643fb872aa04342d27dbef52b2b3cf3fe71b2c7b || >=73febd775bdbdb98c81255ff85773ac410ded5c4 <112b3d48084c820bbccf41d9783fd122e3ac4cb0 || >=73febd775bdbdb98c81255ff85773ac410ded5c4 <552836be2d95c688eede6371f85532abe1a71232 || >=73febd775bdbdb98c81255ff85773ac410ded5c4 <b15b548d52b43ba8ac4652bc2c7244a8dd1e9622 || >=5.15.168 <5.15.221 || >=6.1.113 <6.1.188 || >=6.6.55 <6.6.157 | dc33a9762538b3250ed6b5644a4d44c748be33a6, 1f1bcd4eca6caa3e4258d9a31925112539406eb6, f9094ace03e0a532cc6505d2e97b61ae738da4ed, 643fb872aa04342d27dbef52b2b3cf3fe71b2c7b, 112b3d48084c820bbccf41d9783fd122e3ac4cb0, 552836be2d95c688eede6371f85532abe1a71232, b15b548d52b43ba8ac4652bc2c7244a8dd1e9622, 5.15.221, 6.1.188, 6.6.157 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.