CVE-2025-40223
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)
most: usb: Fix use-after-free in hdm_disconnect
In the Linux kernel, the following vulnerability has been resolved: most: usb: Fix use-after-free in hdm_disconnect hdm_disconnect() calls most_deregister_interface(), which eventually unregisters the MOST interface device with device_unregister(iface->dev). If that drops the last reference, the device core may call release_mdev() immediately while hdm_disconnect() is still executing. The old code also freed several mdev-owned allocations in hdm_disconnect() and then performed additional put_device() calls. Depending on refcount order, this could lead to use-after-free or double-free when release_mdev() ran (or when unregister paths also performed puts). Fix by moving the frees of mdev-owned allocations into release_mdev(), so they happen exactly once when the device is truly released, and by dropping the extra put_device() calls in hdm_disconnect() that are redundant after device_unregister() and most_deregister_interface(). This addresses the KASAN slab-use-after-free reported by syzbot in hdm_disconnect(). See report and stack traces in the bug link below.
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) |
|---|---|---|---|---|---|
| 97a6f772f36b7f52bcfa56a581bbd2470cffe23d | affected | git | 5b5c478f09b1b35e7fe6fc9a1786c9bf6030e831 | Unavailable | None listed |
| 97a6f772f36b7f52bcfa56a581bbd2470cffe23d | affected | git | 578eb18cd111addec94c43f61cd4b4429e454809 | Unavailable | None listed |
| 97a6f772f36b7f52bcfa56a581bbd2470cffe23d | affected | git | 33daf469f5294b9d07c4fc98216cace9f4f34cc6 | Unavailable | None listed |
| 97a6f772f36b7f52bcfa56a581bbd2470cffe23d | affected | git | 72427dc6f87523995f4e6ae35a948bb2992cabce | Unavailable | None listed |
| 97a6f772f36b7f52bcfa56a581bbd2470cffe23d | affected | git | f93a84ffb884d761a9d4e869ba29c238711e81f1 | Unavailable | None listed |
| 97a6f772f36b7f52bcfa56a581bbd2470cffe23d | affected | git | 3a3b8e89c7201c5b3b76ac4a4069d1adde1477d6 | Unavailable | None listed |
| 97a6f772f36b7f52bcfa56a581bbd2470cffe23d | affected | git | 4b1270902609ef0d935ed2faa2ea6d122bd148f5 | 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) |
|---|---|---|---|---|---|
| 5.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.9 | Unavailable | None listed |
| 5.10.246 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.196 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.158 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.115 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.56 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.17.6 | unaffected | semver | Unavailable | 6.17.* | None listed |
| 6.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |