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CVE-2026-46192— spi: microchip-core-qspi: don't attempt to transmit during emulated read-only dual/quad operations

AI Predicted 3.3 Difficulty: Moderate EPSS 0.13% · P3

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProductVersion RangeStatus
LinuxLinux8f9cf02c8852837923f1cdacfcc92e138513325c< ec9d0ddbde6003c303fa5e1d5cd48952852984d8affected
8f9cf02c8852837923f1cdacfcc92e138513325c< 67184f361ab4d9fac6d2b8d5fed6649d496038a4affected
8f9cf02c8852837923f1cdacfcc92e138513325c< eb56deaabf127e8985fc91fa6c97bf8a3b062844affected
6.17affected
< 6.17unaffected
6.18.30≤ 6.18.*unaffected
7.0.7≤ 7.0.*unaffected
7.1≤ *unaffected
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I. Basic Information for CVE-2026-46192

Vulnerability Information
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Vulnerability Title
spi: microchip-core-qspi: don't attempt to transmit during emulated read-only dual/quad operations
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: don't attempt to transmit during emulated read-only dual/quad operations The core will deal with reads by creating clock cycles itself, there's no need to generate clock cycles by transmitting garbage data at the driver level. Further, transmitting garbage data just bricks the transfer since QSPI doesn't have a dedicated master-out line like MOSI in regular SPI. I'm not entirely sure if the transfer is bricked because of the garbage data being transmitted on the bus or because the core loses track of whether it is supposed to be sending or receiving data.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于spi microchip-core-qspi驱动在模拟只读双/四线操作时尝试传输垃圾数据，可能导致传输失败。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 8f9cf02c8852837923f1cdacfcc92e138513325c ~ ec9d0ddbde6003c303fa5e1d5cd48952852984d8 -
LinuxLinux 6.17 -

II. Public POCs for CVE-2026-46192

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III. Intelligence Information for CVE-2026-46192

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Patches & Fixes for CVE-2026-46192 (3)

Same Patch Batch · Linux · 2026-05-28 · 136 CVEs total

CVE-2026-461359.8 CRITICALnvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-461959.8 CRITICALsmb: client: validate dacloffset before building DACL pointers
CVE-2026-461379.8 CRITICALmptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-461159.8 CRITICALblock: add pgmap check to biovec_phys_mergeable
CVE-2026-461559.1 CRITICALsmb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-461199.1 CRITICALlibceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-461859.1 CRITICALsmb/client: fix out-of-bounds read in symlink_data()
CVE-2026-462128.8 HIGHbatman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-461748.8 HIGHx86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-461258.8 HIGHwifi: mac80211: remove station if connection prep fails
CVE-2026-461988.8 HIGHbatman-adv: fix integer overflow on buff_pos
CVE-2026-461668.8 HIGHwifi: mac80211: use safe list iteration in radar detect work
CVE-2026-461528.8 HIGHwifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-462388.8 HIGHbatman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-461138.8 HIGHKVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-462328.1 HIGHHID: playstation: Clamp num_touch_reports
CVE-2026-461388.1 HIGHBluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-461577.8 HIGHALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
CVE-2026-462107.8 HIGHmedia: iris: fix use-after-free of fmt_src during MBPF check
CVE-2026-462157.8 HIGHdrm: Set old handle to NULL before prime swap in change_handle

Showing top 20 of 136 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46192

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