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CVE-2026-43382— batman-adv: Avoid double-rtnl_lock ELP metric worker

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batadv_v_elp_get_throughput在RTNL锁已持有时调用rtnl_lock，可能导致死锁。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.10% · P1

Affected Version Matrix 27

VendorProduct Version RangeStatus
Linux Linux a0019971f340ae02ba54cf1861f72da7e03e6b66< 4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b affected
3c0e0aecb78cb2a2ca1dc701982d08fedb088dc6< 192f40ad8a7dac58dae9199a065dbf7e6e67b75b affected
781a06fd265a8151f7601122d9c2e985663828ff< fa7b4edfbabdf9235b0ab4bea297fc12b3bec9ca affected
a7aa2317285806640c844acd4cd2cd768e395264< f3ca45673dab0514a887231de6f3243a699d5bfd affected
0fdc3c166ac17b26014313fa2b93696354511b24< b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77 affected
8c8ecc98f5c65947b0070a24bac11e12e47cc65d< 2ab9f2531d37775cd79228c1f5d80e6bd08d11d3 affected
8c8ecc98f5c65947b0070a24bac11e12e47cc65d< 77808fe7d03ad0062840b95f431869a8b3d88b24 affected
8c8ecc98f5c65947b0070a24bac11e12e47cc65d< cfc83a3c71517b59c1047db57da31e26a9dc2f33 affected
… +19 more rows
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I. Basic Information for CVE-2026-43382

Vulnerability Information
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Vulnerability Title
batman-adv: Avoid double-rtnl_lock ELP metric worker
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: Avoid double-rtnl_lock ELP metric worker batadv_v_elp_get_throughput() might be called when the RTNL lock is already held. This could be problematic when the work queue item is cancelled via cancel_delayed_work_sync() in batadv_v_elp_iface_disable(). In this case, an rtnl_lock() would cause a deadlock. To avoid this, rtnl_trylock() was used in this function to skip the retrieval of the ethtool information in case the RTNL lock was already held. But for cfg80211 interfaces, batadv_get_real_netdev() was called - which also uses rtnl_lock(). The approach for __ethtool_get_link_ksettings() must also be used instead and the lockless version __batadv_get_real_netdev() has to be called.
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batadv_v_elp_get_throughput在RTNL锁已持有时调用rtnl_lock，可能导致死锁。
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 a0019971f340ae02ba54cf1861f72da7e03e6b66 ~ 4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b -
Linux Linux 6.14 -

II. Public POCs for CVE-2026-43382

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III. Intelligence Information for CVE-2026-43382

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Patches & Fixes for CVE-2026-43382 (8)

Same Patch Batch · Linux · 2026-05-08 · 197 CVEs total

CVE-2026-43376 9.8 CRITICAL ksmbd: fix use-after-free by using call_rcu() for oplock_info
CVE-2026-43384 9.8 CRITICAL net/tcp-ao: Fix MAC comparison to be constant-time
CVE-2026-43304 9.8 CRITICAL libceph: define and enforce CEPH_MAX_KEY_LEN
CVE-2026-43379 9.8 CRITICAL ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
CVE-2026-43414 9.8 CRITICAL scsi: qla2xxx: Completely fix fcport double free
CVE-2026-43378 9.8 CRITICAL smb: server: fix use-after-free in smb2_open()
CVE-2026-43465 9.8 CRITICAL net/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ
CVE-2026-43402 9.8 CRITICAL kthread: consolidate kthread exit paths to prevent use-after-free
CVE-2026-43341 9.8 CRITICAL net/ipv6: ioam6: prevent schema length wraparound in trace fill
CVE-2026-43383 9.4 CRITICAL net/tcp-md5: Fix MAC comparison to be constant-time
CVE-2026-43406 9.1 CRITICAL libceph: prevent potential out-of-bounds reads in process_message_header()
CVE-2026-43407 9.1 CRITICAL libceph: Fix potential out-of-bounds access in ceph_handle_auth_reply()
CVE-2026-43403 8.8 HIGH nsfs: tighten permission checks for ns iteration ioctls
CVE-2026-43334 8.8 HIGH Bluetooth: SMP: force responder MITM requirements before building the pairing response
CVE-2026-43322 8.8 HIGH Bluetooth: hci_sync: Fix UAF in le_read_features_complete
CVE-2026-43391 8.8 HIGH nsfs: tighten permission checks for handle opening
CVE-2026-43284 8.8 HIGH xfrm: esp: avoid in-place decrypt on shared skb frags
CVE-2026-43291 8.3 HIGH net: nfc: nci: Fix parameter validation for packet data
CVE-2026-43365 8.2 HIGH xfs: fix undersized l_iclog_roundoff values
CVE-2026-43452 8.2 HIGH netfilter: x_tables: guard option walkers against 1-byte tail reads

Showing top 20 of 197 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43382

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