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CVE-2026-46238— batman-adv: stop caching unowned originator pointers in BAT IV

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BAT IV缓存未拥有的源节点指针，该指针可能在清理后失效。

CVSS 8.8 · High EPSS 0.41% · P34

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 86b2b58d7c228d850c8c78e4144e6123e8ed2718 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 384e3050a42be9085d50507b4d5f8266a588d742 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 8c16c68fdbb69778f8d04f650340c3f4d1518f8e affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< aafcbaf1159ea224528ca4075d0ba8c10ef374af affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 6e20700f8c524ac379ba8274ff5d453023b7c006 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 09dc0d1a12222ffca6481916eab3cfea477b9620 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 67bceeb22207f1f5a402973a3a0809e5f2698f38 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< f03e8583532941b07761c5429de7d50766fa3110 affected
… +10 more rows
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I. Basic Information for CVE-2026-46238

Vulnerability Information
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Vulnerability Title
batman-adv: stop caching unowned originator pointers in BAT IV
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not owned by the neigh_node and may no longer refer to a live originator entry after purge handling runs. Stop storing the auxiliary originator pointer in the BAT IV neighbor state. When BAT IV needs the neighbor originator data, resolve it from the stored neighbor address and drop the reference again after use. [sven: avoid bonding logic for outgoing OGM]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/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BAT IV缓存未拥有的源节点指针，该指针可能在清理后失效。
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 c6c8fea29769d998d94fcec9b9f14d4b52b349d3 ~ 86b2b58d7c228d850c8c78e4144e6123e8ed2718 -
Linux Linux 2.6.38 -

II. Public POCs for CVE-2026-46238

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III. Intelligence Information for CVE-2026-46238

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Patches & Fixes for CVE-2026-46238 (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-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
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-2026-46174 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-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46227 7.8 HIGH sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL
CVE-2026-46129 7.8 HIGH btrfs: fix double free in create_space_info() error path
CVE-2026-46173 7.8 HIGH exit: prevent preemption of oopsing TASK_DEAD task
CVE-2026-46157 7.8 HIGH ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger

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-2026-46238

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