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Review reviewCritical

CVE-2026-64303

Linux

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...

CVSS
9.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 9.8

Vulnerability overview

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...

Affected product and versions

Product
Linux
Affected versions
>= 09c04466ce7ea494993c0635ba5edb6d2222a806 < ad370d1c7a9a832f77b2341513cd31188c9443af, >= 09c04466ce7ea494993c0635ba5edb6d2222a806 < cce2063404b2341e7b2bbf85eddfcd70a31a0033, >= 09c04466ce7ea494993c0635ba5edb6d2222a806 < af39a2698f69b584d14a00cffe0f51a2caa15337, >= 09c04466ce7ea494993c0635ba5edb6d2222a806 < e65505d91fa036a238968e4c10744244d1b968c4, >= 09c04466ce7ea494993c0635ba5edb6d2222a806 < d5c1060218a3749c8a18b36f8169d910fce20639, >= 09c04466ce7ea494993c0635ba5edb6d2222a806 < 808033d80d5c9f8adf7e8de9317389270ce13430, >= 09c04466ce7ea494993c0635ba5edb6d2222a806 < 9d000bdd250d649a11cd7f733175686877344582, >= 09c04466ce7ea494993c0635ba5edb6d2222a806 < 01980b5da56e573d62798d0ff6c86bcaa2b22cbe, >= 5.2
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2026-64303 — Linux | SECUFOCUS NOW