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CVE-2026-72234— batman-adv: access unicast_ttvn skb->data only after skb realloc

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于pskb_may_pull()重新分配skb缓冲区后，unicast_packet指针未重新赋值，可能导致释放后重用。

CVSS 9.8 · Critical EPSS 0.73% · P53

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c018ad3de61a1dc4194879a53e5559e094aa7b1a< aa9558af859934f24717d4bab97d61004f91a736 affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a< 9c2c05629e46c1fd43931506d41c56a885a98eb4 affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a< 7b162b36de750565404cd3b98315706622c6974f affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a< ed90eb5c68420cdfe67ec1f773324198d2ef6f50 affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a< 979175834a699ccc3c4c0b0ba60ecae0f135a587 affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a< b8afcf799b2cc92c41beebd029e53ed18960184a affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a< 9a7b7248798123efbd5fafe58461d57c7cc718af affected
c018ad3de61a1dc4194879a53e5559e094aa7b1a< 7141990add3f75436f2933cb310654cad3b1e3e9 affected
… +10 more rows
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I. Basic Information for CVE-2026-72234

Vulnerability Information
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Vulnerability Title
batman-adv: access unicast_ttvn skb->data only after skb realloc
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: access unicast_ttvn skb->data only after skb realloc The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the ethernet header but missed for the unicast_packet pointer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于pskb_may_pull()重新分配skb缓冲区后，unicast_packet指针未重新赋值，可能导致释放后重用。
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 c018ad3de61a1dc4194879a53e5559e094aa7b1a ~ aa9558af859934f24717d4bab97d61004f91a736 -
Linux Linux 3.13 -

II. Public POCs for CVE-2026-72234

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III. Intelligence Information for CVE-2026-72234

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Patches & Fixes for CVE-2026-72234 (8)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72429 9.8 CRITICAL ipv6: ioam: fix type confusion of dst_entry
CVE-2026-74394 9.8 CRITICAL RDMA/srpt: fix integer overflow in immediate data length check
CVE-2026-72417 9.8 CRITICAL netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto()
CVE-2026-72069 9.8 CRITICAL locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()
CVE-2026-72422 9.8 CRITICAL ksmbd: fix use-after-free of conn->preauth_info in concurrent SMB2 NEGOTIATE
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-72226 9.8 CRITICAL batman-adv: tt: prevent TVLV OOB check overflow
CVE-2026-72041 9.8 CRITICAL espintcp: use sk_msg_free_partial to fix partial send
CVE-2026-72451 9.8 CRITICAL xfrm: Fix xfrm state cache insertion race

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72234

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