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CVE-2026-46188— octeon_ep_vf: add NULL check for napi_build_skb()

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octeon_ep_vf驱动中napi_build_skb函数在分配失败时返回NULL，但结果被直接使用而未进行NULL检查，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Easy EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 1cd3b407977c3ab1d2ddc26cb7113e7fb1509cd1< 60246cdd4c515ea7d920cddf48932efcb990773e affected
1cd3b407977c3ab1d2ddc26cb7113e7fb1509cd1< b0f4711b426a06fb4c4be85c36b9f5588d5140d3 affected
1cd3b407977c3ab1d2ddc26cb7113e7fb1509cd1< 6fef6640bbf360e254cc0174365ed30ce3a07572 affected
1cd3b407977c3ab1d2ddc26cb7113e7fb1509cd1< dd66b42854705e4e4ee7f14d260f86c578bed3e3 affected
6.9 affected
< 6.9 unaffected
6.12.88≤ 6.12.* unaffected
6.18.30≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-46188

Vulnerability Information
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Vulnerability Title
octeon_ep_vf: add NULL check for napi_build_skb()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: octeon_ep_vf: add NULL check for napi_build_skb() napi_build_skb() can return NULL on allocation failure. In __octep_vf_oq_process_rx(), the result is used directly without a NULL check in both the single-buffer and multi-fragment paths, leading to a NULL pointer dereference. Add NULL checks after both napi_build_skb() calls, properly advancing descriptors and consuming remaining fragments on failure.
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octeon_ep_vf驱动中napi_build_skb函数在分配失败时返回NULL，但结果被直接使用而未进行NULL检查，可能导致空指针取消引用。
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 1cd3b407977c3ab1d2ddc26cb7113e7fb1509cd1 ~ 60246cdd4c515ea7d920cddf48932efcb990773e -
Linux Linux 6.9 -

II. Public POCs for CVE-2026-46188

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III. Intelligence Information for CVE-2026-46188

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Patches & Fixes for CVE-2026-46188 (4)

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

CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
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-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
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-2026-46157 7.8 HIGH ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
CVE-2026-46210 7.8 HIGH media: iris: fix use-after-free of fmt_src during MBPF check
CVE-2026-46215 7.8 HIGH drm: Set old handle to NULL before prime swap in change_handle

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-2026-46188

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