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CVE-2026-72235— batman-adv: retrieve ethhdr after potential skb realloc on RX

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 2.6.38版本存在安全漏洞，该漏洞源于batadv_interface_rx()函数中pskb_may_pull()可能重新分配skb缓冲区，但指向旧缓冲区的以太网头指针未重新赋值，可能导致释放后重用。

CVSS 8.8 · High EPSS 0.34% · P26

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 6e189f14d1ea28db212b9d70a02131a7ce518012 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< a1820344b180cb55af748f102bc536b5c93164db affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 6abf73589bed3f27ee240c08108feb72bed0b9c6 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< f19259395b44af67f3c274e34237c295b526b859 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 2cefa5141cab8ec1e4b24cf585958b13f2e3049d affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 85a71a81854e0e191ad0e533eabb4eff54866feb affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< b031fc97e1993d29d6c3a0e86a99140528cf31e8 affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 035e1fed892d3d06002a73ff73668f618a514644 affected
… +10 more rows
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I. Basic Information for CVE-2026-72235

Vulnerability Information
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Vulnerability Title
batman-adv: retrieve ethhdr after potential skb realloc on RX
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: retrieve ethhdr after potential skb realloc on RX pskb_may_pull() in batadv_interface_rx() 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 VLAN header but missed for the ethernet header which is later used for the TT and AP isolation handling.
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基金会开源的一个操作系统内核。 Linux kernel 2.6.38版本存在安全漏洞，该漏洞源于batadv_interface_rx()函数中pskb_may_pull()可能重新分配skb缓冲区，但指向旧缓冲区的以太网头指针未重新赋值，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 c6c8fea29769d998d94fcec9b9f14d4b52b349d3 ~ 6e189f14d1ea28db212b9d70a02131a7ce518012 -
Linux Linux 2.6.38 -

II. Public POCs for CVE-2026-72235

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III. Intelligence Information for CVE-2026-72235

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Patches & Fixes for CVE-2026-72235 (8)

Same Patch Batch · Linux · 2026-08-15 · 845 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-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72436 9.8 CRITICAL netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
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-2026-72429 9.8 CRITICAL ipv6: ioam: fix type confusion of dst_entry
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72046 9.8 CRITICAL gve: fix header buffer corruption with header-split and HW-GRO
CVE-2026-72226 9.8 CRITICAL batman-adv: tt: prevent TVLV OOB check overflow
CVE-2026-72451 9.8 CRITICAL xfrm: Fix xfrm state cache insertion race

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72235

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