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CVE-2026-72233— batman-adv: bla: reacquire gw address 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 4.12版本存在安全漏洞，该漏洞源于batadv_bla_is_backbone_gw()调用pskb_may_pull()后skb缓冲区可能被重新分配，指向旧缓冲区的变量未重新赋值，可能导致释放后重用。

CVSS 8.8 · High EPSS 0.34% · P26

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88< 41819c5467b6eb8ab4567f0ac98702ce9b6abbb1 affected
9e794b6bf4a2c65d698d7433ddfabc54a5d53a88< a9ab19fbca86b32e9a9ae9e1a63e70a7eab3400f affected
9e794b6bf4a2c65d698d7433ddfabc54a5d53a88< 4a6673c55752a7aa41e28f51660eb981504ca088 affected
9e794b6bf4a2c65d698d7433ddfabc54a5d53a88< ab2bac47a02637df1128a151e81d3ec14767f4bb affected
9e794b6bf4a2c65d698d7433ddfabc54a5d53a88< dc16bbf53cede1baf564bf0c8a861114b64e18b3 affected
9e794b6bf4a2c65d698d7433ddfabc54a5d53a88< e5e18886aadd3870e2d84e32a9678317fab1dd9e affected
9e794b6bf4a2c65d698d7433ddfabc54a5d53a88< f4fb97ecf677cd9c3aa4f3bfc6fbf5b0e4bdbbbf affected
9e794b6bf4a2c65d698d7433ddfabc54a5d53a88< cdf3b5af2bc4431e58629e8ad2086b1e9185c761 affected
… +10 more rows
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I. Basic Information for CVE-2026-72233

Vulnerability Information
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Vulnerability Title
batman-adv: bla: reacquire gw address after skb realloc
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: reacquire gw address after skb realloc The pskb_may_pull() called by batadv_bla_is_backbone_gw() 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.
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 4.12版本存在安全漏洞，该漏洞源于batadv_bla_is_backbone_gw()调用pskb_may_pull()后skb缓冲区可能被重新分配，指向旧缓冲区的变量未重新赋值，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 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 ~ 41819c5467b6eb8ab4567f0ac98702ce9b6abbb1 -
Linux Linux 4.12 -

II. Public POCs for CVE-2026-72233

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III. Intelligence Information for CVE-2026-72233

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Patches & Fixes for CVE-2026-72233 (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-2026-72233

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