CVE-2026-64331
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)
usbip: vudc: fix NULL deref in vep_dequeue()
In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: fix NULL deref in vep_dequeue() vep_alloc_request() wasn't initializing vrequest->udc, so cancellations on the FunctionFS AIO path were arriving in vep_dequeue without a valid UDC reference. Since vrequest->udc is never actually properly used anywhere, we opt to remove it, and update vep_dequeue to obtain a reference to the udc with ep_to_vudc(), consistent with the other vep_ ops. AFAICT this bug has existed for ~10 years. Seems that nobody has really stressed the FunctionFS AIO path on usbip's vudc. I tested this fix in a QEMU aarch64 guest driving FunctionFS endpoints via AIO. Before the fix, running `usbip attach` from the host would cause the guest to oops with the following backtrace: Call trace: vep_dequeue+0x1c/0xe4 (P) usb_ep_dequeue+0x14/0x20 ffs_aio_cancel+0x24/0x34 __arm64_sys_io_cancel+0xb0/0x124 do_el0_svc+0x68/0x100 el0_svc+0x18/0x5c el0t_64_sync_handler+0x98/0xdc el0t_64_sync+0x154/0x158
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) |
|---|---|---|---|---|---|
| b6a0ca11186759ad7045d68a5447b1e89f658384 | affected | git | 9858c91d9ee6a13c45311569039413729fc9b757 | Unavailable | None listed |
| b6a0ca11186759ad7045d68a5447b1e89f658384 | affected | git | 1226293ec9bed3d4cc5b05eeeb811d315ca51652 | Unavailable | None listed |
| b6a0ca11186759ad7045d68a5447b1e89f658384 | affected | git | 3750f75f29f99c0223601e2ee73ad084adec47bd | Unavailable | None listed |
| b6a0ca11186759ad7045d68a5447b1e89f658384 | affected | git | d0ebf9cc7c2ddf95a7cfc654b940bdacb7edde97 | Unavailable | None listed |
| b6a0ca11186759ad7045d68a5447b1e89f658384 | affected | git | 0025276175fbbe0dcbf3f84d090b0adee769e9d9 | Unavailable | None listed |
| b6a0ca11186759ad7045d68a5447b1e89f658384 | affected | git | 347b59e9f96719d89b6ef555d02a18ada1a5846f | Unavailable | None listed |
| b6a0ca11186759ad7045d68a5447b1e89f658384 | affected | git | 0443e4416aa1ee97748d1ed904eaf3352c60045e | Unavailable | None listed |
| b6a0ca11186759ad7045d68a5447b1e89f658384 | affected | git | c5371e0b91b24159a3ebaa61e70b0980bcf03c0a | 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) |
|---|---|---|---|---|---|
| 4.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.7 | Unavailable | None listed |
| 5.10.261 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.212 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.96 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.39 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.4 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |