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CVE-2026-64303— spi: fsl-lpspi: terminate the RX channel on TX prepare failure path

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.2版本存在安全漏洞，该漏洞源于spi: fsl-lpspi驱动中TX准备失败路径未终止RX通道，可能导致内存损坏或释放后重用。

CVSS 9.8 · Critical EPSS 0.69% · P52

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 09c04466ce7ea494993c0635ba5edb6d2222a806< ad370d1c7a9a832f77b2341513cd31188c9443af affected
09c04466ce7ea494993c0635ba5edb6d2222a806< cce2063404b2341e7b2bbf85eddfcd70a31a0033 affected
09c04466ce7ea494993c0635ba5edb6d2222a806< af39a2698f69b584d14a00cffe0f51a2caa15337 affected
09c04466ce7ea494993c0635ba5edb6d2222a806< e65505d91fa036a238968e4c10744244d1b968c4 affected
09c04466ce7ea494993c0635ba5edb6d2222a806< d5c1060218a3749c8a18b36f8169d910fce20639 affected
09c04466ce7ea494993c0635ba5edb6d2222a806< 808033d80d5c9f8adf7e8de9317389270ce13430 affected
09c04466ce7ea494993c0635ba5edb6d2222a806< 9d000bdd250d649a11cd7f733175686877344582 affected
09c04466ce7ea494993c0635ba5edb6d2222a806< 01980b5da56e573d62798d0ff6c86bcaa2b22cbe affected
… +10 more rows
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I. Basic Information for CVE-2026-64303

Vulnerability Information
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Vulnerability Title
spi: fsl-lpspi: terminate the RX channel on TX prepare failure path
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.2版本存在安全漏洞，该漏洞源于spi: fsl-lpspi驱动中TX准备失败路径未终止RX通道，可能导致内存损坏或释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 09c04466ce7ea494993c0635ba5edb6d2222a806 ~ ad370d1c7a9a832f77b2341513cd31188c9443af -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-64303

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III. Intelligence Information for CVE-2026-64303

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Patches & Fixes for CVE-2026-64303 (7)

Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total

CVE-2026-64355 9.8 CRITICAL bpf: Reject fragmented frames in devmap
CVE-2026-64459 9.8 CRITICAL tcp: restore RCU grace period in tcp_ao_destroy_sock
CVE-2026-64439 9.8 CRITICAL crypto: krb5 - filter out async aead implementations at alloc
CVE-2026-64410 9.8 CRITICAL netfilter: flowtable: IPIP tunnel hardware offload is not yet support
CVE-2026-64399 9.8 CRITICAL ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
CVE-2026-64397 9.8 CRITICAL ksmbd: serialize QUERY_DIRECTORY requests per file
CVE-2026-64391 9.8 CRITICAL ksmbd: use opener credentials for ADS I/O
CVE-2026-64387 9.8 CRITICAL smb: client: fix query directory replay double-free
CVE-2026-64386 9.8 CRITICAL smb: client: fix query_info() replay double-free
CVE-2026-64385 9.8 CRITICAL smb: client: fix double-free in SMB2_ioctl() replay
CVE-2026-64383 9.8 CRITICAL smb: client: fix double-free in SMB2_flush() replay
CVE-2026-64384 9.8 CRITICAL smb: client: fix change notify replay double-free
CVE-2026-64268 9.8 CRITICAL RDMA/siw: bound Read Response placement to the RREAD length
CVE-2026-64523 9.8 CRITICAL net/handshake: Take a long-lived file reference at submit
CVE-2026-64392 9.1 CRITICAL ksmbd: use opener credentials for delete-on-close
CVE-2026-64393 9.1 CRITICAL ksmbd: run set info with opener credentials
CVE-2026-64269 9.1 CRITICAL RDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg
CVE-2026-64257 9.1 CRITICAL smb: client: reject overlapping data areas in SMB2 responses
CVE-2026-64320 9.1 CRITICAL nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page
CVE-2026-64450 9.1 CRITICAL tipc: fix out-of-bounds read in broadcast Gap ACK blocks

Showing top 20 of 274 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64303

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