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CVE-2026-53131— netfilter: require Ethernet MAC header before using eth_hdr()

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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于netfilter在访问eth_hdr(skb)前未验证skb是否与以太网设备关联及MAC标头设置，可能导致未授权访问或信息泄露。

CVSS 9.4 · Critical EPSS 0.43% · P35

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4435888e1bf139d2bfe5911643d4217382136743 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 063f43361e884acd7300790e90194430275d0d0c affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 726abf97566867f808fec9d8a408eb9698bd570a affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 367abcacc13a8e2e7624408b7f593bd1e60e49d9 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5d634afb8b83b49de562792fd0d047416a43bd4d affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< cea435ea7e868ea6fdf039bc4f2090c1d829b556 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 62443dc21114c0bbc476fa62973db89743f2f137 affected
2.6.12 affected
… +8 more rows
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I. Basic Information for CVE-2026-53131

Vulnerability Information
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Vulnerability Title
netfilter: require Ethernet MAC header before using eth_hdr()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() `ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and `hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)` after either assuming that the skb is associated with an Ethernet device or checking only that the `ETH_HLEN` bytes at `skb_mac_header(skb)` lie between `skb->head` and `skb->data`. Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header was set, and that it spans at least a full Ethernet header before accessing `eth_hdr(skb)`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于netfilter在访问eth_hdr(skb)前未验证skb是否与以太网设备关联及MAC标头设置，可能导致未授权访问或信息泄露。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 4435888e1bf139d2bfe5911643d4217382136743 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-53131

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III. Intelligence Information for CVE-2026-53131

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Patches & Fixes for CVE-2026-53131 (7)

Same Patch Batch · Linux · 2026-06-25 · 146 CVEs total

CVE-2026-53216 9.8 CRITICAL net: mvpp2: limit XDP frame size to the RX buffer
CVE-2026-53246 9.8 CRITICAL sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-53247 9.8 CRITICAL net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
CVE-2026-53151 9.8 CRITICAL rxrpc: Fix the ACK parser to extract the SACK table for parsing
CVE-2026-53228 9.8 CRITICAL ipv6: sit: reload inner IPv6 header after GSO offloads
CVE-2026-53260 9.8 CRITICAL tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().
CVE-2026-53221 9.8 CRITICAL ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-53215 9.8 CRITICAL net: mvpp2: refill RX buffers before XDP or skb use
CVE-2026-53176 9.8 CRITICAL IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
CVE-2026-53175 9.8 CRITICAL inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
CVE-2026-53225 9.1 CRITICAL sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
CVE-2026-53186 9.1 CRITICAL RDMA/srp: bound SRP_RSP sense copy by the received length
CVE-2026-53224 9.1 CRITICAL sctp: validate embedded INIT chunk and address list lengths in cookie
CVE-2026-53240 8.8 HIGH xfrm: iptfs: fix use-after-free on first_skb in __input_process_payload
CVE-2026-53171 8.8 HIGH accel/ethosu: fix arithmetic issues in dma_length()
CVE-2026-53188 8.8 HIGH RDMA/core: Validate the passed in fops for ib_get_ucaps()
CVE-2026-53198 8.8 HIGH ksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL
CVE-2026-53159 8.8 HIGH misc: fastrpc: fix DMA address corruption due to find_vma misuse
CVE-2026-53170 8.8 HIGH accel/ethosu: reject DMA commands with uninitialized length
CVE-2026-53200 8.8 HIGH KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX

Showing top 20 of 146 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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