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CVE-2026-80601— batman-adv: gw: acquire ethernet header 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batadv_get_vid()调用pskb_may_pull()时重新分配skb缓冲区，导致指向旧缓冲区的变量未及时更新，可能引发释放后重用（use-after-free）。

CVSS 8.8 · High EPSS 0.40% · P33

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9< 2760b38222c8828b075802342fe3b91eb823d542 affected
6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9< 6c37f1166549c999ccd164b0cb6462d1ae68f8f6 affected
6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9< b79884a5567bf788fb76c30832467cf6a56f3c0d affected
6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9< afac8096bde4948e3caa7e4dd733867cfbd3018e affected
6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9< e3f4325e35dd6e76b80665f3510738ce34819753 affected
6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9< e6b43acd34b219b807e65096ce207b087942779d affected
6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9< 916dac5f2944f63f07f7b501acbea6737dbbed0e affected
6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9< 77880a3be88d378d60cc1e8f8ec70430e2ed0518 affected
… +10 more rows
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I. Basic Information for CVE-2026-80601

Vulnerability Information
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Vulnerability Title
batman-adv: gw: acquire ethernet header only after skb realloc
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: gw: acquire ethernet header 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: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存在安全漏洞，该漏洞源于batadv_get_vid()调用pskb_may_pull()时重新分配skb缓冲区，导致指向旧缓冲区的变量未及时更新，可能引发释放后重用（use-after-free）。
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 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 ~ 2760b38222c8828b075802342fe3b91eb823d542 -
Linux Linux 3.14 -

II. Public POCs for CVE-2026-80601

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III. Intelligence Information for CVE-2026-80601

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Patches & Fixes for CVE-2026-80601 (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-2026-80600 9.8 CRITICAL batman-adv: dat: acquire ARP hw source only after skb realloc
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-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80604 8.8 HIGH HID: core: Fix OOB read in hid_get_report for numbered reports
CVE-2026-80608 8.8 HIGH accel/amdxdna: Fix iommu domain lifetime race during device removal
CVE-2026-80683 8.8 HIGH Bluetooth: SCO: give the socket its own sco_conn reference

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-2026-80601

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