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CVE-2026-46127— RDMA/ocrdma: Don't NULL deref uctx on errors in ocrdma_copy_pd_uresp()

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ocrdma_copy_pd_uresp()中错误路径对未初始化的pd->uctx进行空指针解引用，可能导致崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux fe2caefcdf5869f308c102e3d64d40683bfad711< b610f33c5523fe26f6dd897667fff9c7a1de5905 affected
fe2caefcdf5869f308c102e3d64d40683bfad711< 443c991fbc954cc9363e963c09f404b9f281f3a2 affected
fe2caefcdf5869f308c102e3d64d40683bfad711< 27b6eb1f27fda9bdd5cae028e396758cdf525845 affected
fe2caefcdf5869f308c102e3d64d40683bfad711< e01a957561f663d3b68d2fd233a4502e3367efcd affected
fe2caefcdf5869f308c102e3d64d40683bfad711< 75fc130664ae324e7b2f9ad3630e0f175e9ca6c8 affected
fe2caefcdf5869f308c102e3d64d40683bfad711< 8832626a483439e207734e027afff322ccdf726e affected
fe2caefcdf5869f308c102e3d64d40683bfad711< ec44c00a4fe1327efa35083f98b39c01cb535a51 affected
fe2caefcdf5869f308c102e3d64d40683bfad711< 34fbf48cf3b410d2a6e8c586fa952a36331ca5ba affected
… +10 more rows
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I. Basic Information for CVE-2026-46127

Vulnerability Information
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Vulnerability Title
RDMA/ocrdma: Don't NULL deref uctx on errors in ocrdma_copy_pd_uresp()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/ocrdma: Don't NULL deref uctx on errors in ocrdma_copy_pd_uresp() Sashiko points out that pd->uctx isn't initialized until late in the function so all these error flow references are NULL and will crash. Use the uctx that isn't NULL.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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ocrdma_copy_pd_uresp()中错误路径对未初始化的pd->uctx进行空指针解引用，可能导致崩溃。
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 fe2caefcdf5869f308c102e3d64d40683bfad711 ~ b610f33c5523fe26f6dd897667fff9c7a1de5905 -
Linux Linux 3.5 -

II. Public POCs for CVE-2026-46127

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III. Intelligence Information for CVE-2026-46127

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Patches & Fixes for CVE-2026-46127 (7)

Same Patch Batch · Linux · 2026-05-28 · 135 CVEs total

CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46145 7.8 HIGH RDMA/mana: Validate rx_hash_key_len
CVE-2026-46205 7.8 HIGH staging: media: atomisp: Disallow all private IOCTLs
CVE-2026-46173 7.8 HIGH exit: prevent preemption of oopsing TASK_DEAD task

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46127

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