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CVE-2026-46231— batman-adv: bla: put backbone reference on failed claim hash insert

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batman-adv bla在向哈希插入声明失败时未释放backbone_gw引用，导致backbone_gw对象泄漏。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1562.001

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux 3db0decf1185357d6ab2256d0dede1ca9efda03d< 6c8b68a7ed667a63aa603ba4d3a7088be143007e affected
3db0decf1185357d6ab2256d0dede1ca9efda03d< 769f413d374ff2b6ff6d8d8c37b4c1178e6cdf14 affected
3db0decf1185357d6ab2256d0dede1ca9efda03d< 2888c9a154123db0254ae4fb9bea570c7e1f2e06 affected
3db0decf1185357d6ab2256d0dede1ca9efda03d< 65419eb4259a26a3cd3f56fa0e3b3c113bf8c256 affected
3db0decf1185357d6ab2256d0dede1ca9efda03d< fd0ca034c1e71ca7613cde9dd892836b2c2831bd affected
3db0decf1185357d6ab2256d0dede1ca9efda03d< 0baf4b659cdc7305cf685b5a5d60f9e3816ab5d0 affected
3db0decf1185357d6ab2256d0dede1ca9efda03d< 7cccf4eb4f96d3c3af91a00b7a9caa652439542e affected
3db0decf1185357d6ab2256d0dede1ca9efda03d< ba9d20ee9076dac32c371116bacbe72480eb356c affected
… +14 more rows
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I. Basic Information for CVE-2026-46231

Vulnerability Information
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Vulnerability Title
batman-adv: bla: put backbone reference on failed claim hash insert
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: put backbone reference on failed claim hash insert When batadv_bla_add_claim() fails to insert a new claim into the hash, it leaked a reference to the backbone_gw for which the claim was intended. Call batadv_backbone_gw_put() on the error path to release the reference and avoid leaking the backbone_gw object.
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batman-adv bla在向哈希插入声明失败时未释放backbone_gw引用，导致backbone_gw对象泄漏。
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 3db0decf1185357d6ab2256d0dede1ca9efda03d ~ 6c8b68a7ed667a63aa603ba4d3a7088be143007e -
Linux Linux 4.7 -

II. Public POCs for CVE-2026-46231

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III. Intelligence Information for CVE-2026-46231

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Patches & Fixes for CVE-2026-46231 (8)

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-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
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-2026-46185 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-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
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-2026-46152 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-2026-46113 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-2026-46227 7.8 HIGH sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL
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-2026-46231

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