CVE-2026-64303
Published: July 29, 2026Last modified: August 14, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: spi: fsl-lpspi: terminate the RX channel on TX prepare failure path When dmaengine_prep_slave_sg() fails for the TX channel, the error path terminates the TX DMA channel but leaves the RX channel running. Since the RX channel was already submitted and issued prior to preparing the TX descriptor, returning -EINVAL causes the SPI core to unmap the DMA buffers while the RX DMA engine continues writing to them, leading to potential memory corruption or use-after-free. Terminate the RX channel before returning on the TX prepare failure path.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.182-r0) |
| 25 LTS | linux-lts | Fixed (6.12.103-r0) | |
| Stream | linux-lts | Fixed (6.18.43-r0) |
References
- https://git.kernel.org/stable/c/01980b5da56e573d62798d0ff6c86bcaa2b22cbe
- https://git.kernel.org/stable/c/808033d80d5c9f8adf7e8de9317389270ce13430
- https://git.kernel.org/stable/c/9d000bdd250d649a11cd7f733175686877344582
- https://git.kernel.org/stable/c/ad370d1c7a9a832f77b2341513cd31188c9443af
- https://git.kernel.org/stable/c/af39a2698f69b584d14a00cffe0f51a2caa15337
- https://git.kernel.org/stable/c/cce2063404b2341e7b2bbf85eddfcd70a31a0033
- https://git.kernel.org/stable/c/d5c1060218a3749c8a18b36f8169d910fce20639
- https://git.kernel.org/stable/c/e65505d91fa036a238968e4c10744244d1b968c4