Answer in brief
CVE-2026-23281 records a Unknown severity vulnerability in wifi: libertas: fix use-after-free in lbs_free_adapter(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=954ee164f4f4598afc172c0ec3865d0352e55a0b <b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4 || >=954ee164f4f4598afc172c0ec3865d0352e55a0b <09f3c30ab3b1371eaf9676a1b8add57bca763083 || >=954ee164f4f4598afc172c0ec3865d0352e55a0b <3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dc || >=954ee164f4f4598afc172c0ec3865d0352e55a0b <3c5c818c78b03a1725f3dcd566865c77b48dd3a6 || >=954ee164f4f4598afc172c0ec3865d0352e55a0b <d0155fe68f31b339961cf2d4f92937d57e9384e6 || >=954ee164f4f4598afc172c0ec3865d0352e55a0b <ed7d30f90b77f73a47498686ede83f622b7e4f0d || >=954ee164f4f4598afc172c0ec3865d0352e55a0b <a9f55b14486426d907459bced5825a25063bd922 || >=954ee164f4f4598afc172c0ec3865d0352e55a0b <03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0 | b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4, 09f3c30ab3b1371eaf9676a1b8add57bca763083, 3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dc, 3c5c818c78b03a1725f3dcd566865c77b48dd3a6, d0155fe68f31b339961cf2d4f92937d57e9384e6, ed7d30f90b77f73a47498686ede83f622b7e4f0d, a9f55b14486426d907459bced5825a25063bd922, 03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0 |
| Linux/Linuxgeneric | 2.6.24 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix use-after-free in lbs_free_adapter() The lbs_free_adapter() function uses timer_delete() (non-synchronous) for both command_timer and tx_lockup_timer before the structure is freed. This is incorrect because timer_delete() does not wait for any running timer callback to complete. If a timer callback is executing when lbs_free_adapter() is called, the callback will access freed memory since lbs_cfg_free() frees the containing structure immediately after lbs_free_adapter() returns. Both timer callbacks (lbs_cmd_timeout_handler and lbs_tx_lockup_handler) access priv->driver_lock, priv->cur_cmd, priv->dev, and other fields, which would all be use-after-free violations. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning. This bug was introduced in commit 8f641d93c38a ("libertas: detect TX lockups and reset hardware") where del_timer() was used instead of del_timer_sync() in the cleanup path. The command_timer has had the same issue since the driver was first written.
Quoted source text, attributed separately from HOL analysis.