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CVE-2026-80600— batman-adv: dat: acquire ARP hw source 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.

在 Linux 内核中，以下漏洞已得到修复： batman-adv: dat: 在 skb 重新分配后才获取 ARP 硬件源 由 调用的 可能会在 skb 背后重新分配缓冲区。那些指向旧缓冲区的变量需要重新赋值，以避免发生 use-after-free（释放后使用）错误。

CVSS 9.8 · Critical EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux b61ec31c85756bbc898fb892555509afe709459a< a82fc217cb7a447313c76ebf9f09b100771b0ddf affected
b61ec31c85756bbc898fb892555509afe709459a< 86aa79b43e5b561fd3648891165bd7313b541315 affected
b61ec31c85756bbc898fb892555509afe709459a< d755cd001fa2c248e186c1fc3df3d11d97dc843c affected
b61ec31c85756bbc898fb892555509afe709459a< 3404be97b940a9b1ae1aea5fdbc6cdbbe9cd5146 affected
b61ec31c85756bbc898fb892555509afe709459a< 01678c53a7717a748aee388b6839e7b9761d641c affected
b61ec31c85756bbc898fb892555509afe709459a< 3b4c70c40f2e135a50cd38fc61c7d23a296a9981 affected
b61ec31c85756bbc898fb892555509afe709459a< 059a70e1d12d6d99310e0599d37b0323557569a8 affected
b61ec31c85756bbc898fb892555509afe709459a< 48067b2ae4504500a7093d9e1e16b42e70330480 affected
… +10 more rows
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I. Basic Information for CVE-2026-80600

Vulnerability Information
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Vulnerability Title
batman-adv: dat: acquire ARP hw source only after skb realloc
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: acquire ARP hw source 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.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b61ec31c85756bbc898fb892555509afe709459a ~ a82fc217cb7a447313c76ebf9f09b100771b0ddf -
Linux Linux 5.1 -

II. Public POCs for CVE-2026-80600

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III. Intelligence Information for CVE-2026-80600

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Patches & Fixes for CVE-2026-80600 (8)

Same Patch Batch · Linux · 2026-08-28 · 135 CVEs total

CVE-2026-80634 9.8 CRITICAL netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
CVE-2026-80694 9.8 CRITICAL net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
CVE-2026-80681 9.8 CRITICAL vxlan: re-fetch eth header after route_shortcircuit()
CVE-2026-80674 9.8 CRITICAL ntfs: validate resident attribute lists and harden the validator
CVE-2026-80673 9.8 CRITICAL ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()
CVE-2026-80668 9.8 CRITICAL netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
CVE-2026-80630 9.8 CRITICAL net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restorin
CVE-2026-80617 9.8 CRITICAL net: airoha: fix foe_check_time allocation size
CVE-2026-80714 9.8 CRITICAL ipvs: do not propagate one-packet flag to synced conns
CVE-2026-80609 9.8 CRITICAL qede: fix out-of-bounds check for cqe->len_list[]
CVE-2026-80612 9.8 CRITICAL net: lwtunnel: Drop skb metadata before LWT encapsulation
CVE-2026-80671 9.3 CRITICAL perf sched: Fix register_pid() overflow, strcpy, and BUG_ON
CVE-2026-80693 9.3 CRITICAL idpf: bound interrupt-vector register fill to the allocated array
CVE-2026-80684 9.3 CRITICAL KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80604 8.8 HIGH HID: core: Fix OOB read in hid_get_report for numbered reports
CVE-2026-80724 8.8 HIGH ptp: vmclock: prevent read-only mappings from becoming writable
CVE-2026-80683 8.8 HIGH Bluetooth: SCO: give the socket its own sco_conn reference
CVE-2026-80721 8.8 HIGH Bluetooth: ISO: ensure no dangling hcon references in iso_conn

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80600

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