CVE-2026-23281wifi: libertas: fix use-after-free in lbs_free_adapter()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 954ee164f4f4598afc172c0ec3865d0352e55a0b before b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4; 954ee164f4f4598afc172c0ec3865d0352e55a0b builds before 09f3c30ab3b1371eaf9676a1b8add57bca763083; 954ee164f4f4598afc172c0ec3865d0352e55a0b builds before 3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dc; 954ee164f4f4598afc172c0ec3865d0352e55a0b builds before 3c5c818c78b03a1725f3dcd566865c77b48dd3a6; from 954ee164f4f4598afc172c0ec3865d0352e55a0b before d0155fe68f31b339961cf2d4f92937d57e9384e6; from 954ee164f4f4598afc172c0ec3865d0352e55a0b before ed7d30f90b77f73a47498686ede83f622b7e4f0d; from 954ee164f4f4598afc172c0ec3865d0352e55a0b before a9f55b14486426d907459bced5825a25063bd922; 954ee164f4f4598afc172c0ec3865d0352e55a0b builds before 03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.24 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4patch
- https://git.kernel.org/stable/c/09f3c30ab3b1371eaf9676a1b8add57bca763083patch
- https://git.kernel.org/stable/c/3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dcpatch
- https://git.kernel.org/stable/c/3c5c818c78b03a1725f3dcd566865c77b48dd3a6patch
- https://git.kernel.org/stable/c/d0155fe68f31b339961cf2d4f92937d57e9384e6patch
- https://git.kernel.org/stable/c/ed7d30f90b77f73a47498686ede83f622b7e4f0dpatch
- https://git.kernel.org/stable/c/a9f55b14486426d907459bced5825a25063bd922patch
- https://git.kernel.org/stable/c/03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.