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CVE-2026-52926— batman-adv: clear current gateway during teardown

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基金会开源的操作系统Linux所使用的内核。 Linux kernel 3.1之前版本存在安全漏洞，该漏洞源于batman-adv模块在teardown期间未清除当前网关选择，可能导致后续网格重建失败。

AI Predicted 5.5 Difficulty: Trivial EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1562

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 2265c141086474bbae55a5bb3afa1ebb78ccaa7c< a3f3f1ec8aad84c5dd386c430b9c61cddd85b18f affected
2265c141086474bbae55a5bb3afa1ebb78ccaa7c< e2ec4c712d19141ca7bf7fbbb1d842f73abaa186 affected
2265c141086474bbae55a5bb3afa1ebb78ccaa7c< 9a1a8ed4facfe843bde6fdfcf7af0e9923eb2e17 affected
2265c141086474bbae55a5bb3afa1ebb78ccaa7c< 6de089b545db013433cf934bb4e4433dec2dd65f affected
2265c141086474bbae55a5bb3afa1ebb78ccaa7c< 30bda3ef4b0cac777f1a7c314cd08b8ff6437365 affected
2265c141086474bbae55a5bb3afa1ebb78ccaa7c< ae7aeb0ce3c0ebbe357ed525779acac197a18086 affected
2265c141086474bbae55a5bb3afa1ebb78ccaa7c< 17e3a441111cd1a530cd6ee69a22f3161d80d810 affected
2265c141086474bbae55a5bb3afa1ebb78ccaa7c< a340a51ed801eab7bb454150c226323b865263cc affected
… +10 more rows
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I. Basic Information for CVE-2026-52926

Vulnerability Information
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Vulnerability Title
batman-adv: clear current gateway during teardown
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: clear current gateway during teardown batadv_gw_node_free() removes the gateway list entries during mesh teardown, but it does not clear the currently selected gateway. This leaves stale gateway state behind across cleanup and can break a later mesh recreation. Clear bat_priv->gw.curr_gw before walking the gateway list so the selected gateway reference is dropped as part of teardown.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 3.1之前版本存在安全漏洞，该漏洞源于batman-adv模块在teardown期间未清除当前网关选择，可能导致后续网格重建失败。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 2265c141086474bbae55a5bb3afa1ebb78ccaa7c ~ a3f3f1ec8aad84c5dd386c430b9c61cddd85b18f -
Linux Linux 3.1 -

II. Public POCs for CVE-2026-52926

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III. Intelligence Information for CVE-2026-52926

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Patches & Fixes for CVE-2026-52926 (8)

Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total

CVE-2026-53049 9.8 CRITICAL gfs2: add some missing log locking
CVE-2026-52993 9.8 CRITICAL tipc: fix double-free in tipc_buf_append()
CVE-2026-52989 9.8 CRITICAL nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-52986 9.8 CRITICAL netfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-52982 9.8 CRITICAL net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-53002 9.8 CRITICAL netfilter: conntrack: remove sprintf usage
CVE-2026-53006 9.8 CRITICAL ipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-53045 9.8 CRITICAL memory: tegra124-emc: Fix dll_change check
CVE-2026-53086 9.8 CRITICAL net: bcmgenet: fix racing timeout handler
CVE-2026-53046 9.8 CRITICAL ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-52955 9.8 CRITICAL libceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-53010 9.8 CRITICAL ksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-53088 9.8 CRITICAL net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-52914 9.8 CRITICAL batman-adv: fix fragment reassembly length accounting
CVE-2026-53055 9.8 CRITICAL crypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-52924 9.8 CRITICAL sctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-52931 9.8 CRITICAL batman-adv: tp_meter: avoid use of uninit sender vars
CVE-2026-52999 9.1 CRITICAL netfilter: nfnetlink_osf: fix out-of-bounds read on option matching
CVE-2026-53043 9.1 CRITICAL ocfs2/dlm: validate qr_numregions in dlm_match_regions()
CVE-2026-52958 9.1 CRITICAL libceph: Fix potential out-of-bounds access in osdmap_decode()

Showing top 20 of 219 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-52926

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