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CVE-2026-52912— netfilter: nf_queue: hold bridge skb->dev while queued

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 4.7版本存在安全漏洞，该漏洞源于netfilter: nf_queue组件在桥接数据包排队期间未能保持skb->dev引用，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.16% · P4

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ac28634456867b23b95faccba7997a62ec430603< 950d809f154dca04e5fbe5d3c8b9c5e44769cd57 affected
ac28634456867b23b95faccba7997a62ec430603< a698ac8ab2561cf575d2d9f34095032651dd952e affected
ac28634456867b23b95faccba7997a62ec430603< 19924bdd8a45ebc72a7b84c57fd63057d1dc75ac affected
ac28634456867b23b95faccba7997a62ec430603< 1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be affected
ac28634456867b23b95faccba7997a62ec430603< 3823c27099cfe2482299065814adbaa771be9644 affected
ac28634456867b23b95faccba7997a62ec430603< 15d464265120ab9818bd673af301deee09bedab2 affected
ac28634456867b23b95faccba7997a62ec430603< 3fb0f5c0f64162a8c3f25616a4f1e340b921737f affected
ac28634456867b23b95faccba7997a62ec430603< e196115ec330a18de415bdb9f5071aa9f08e53ce affected
… +10 more rows
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I. Basic Information for CVE-2026-52912

Vulnerability Information
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Vulnerability Title
netfilter: nf_queue: hold bridge skb->dev while queued
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_queue: hold bridge skb->dev while queued br_pass_frame_up() rewrites skb->dev from the ingress port to the bridge master before queueing bridge LOCAL_IN packets. NFQUEUE only holds references on state.in/out and bridge physdevs, so a queued bridge packet can retain a freed bridge master in skb->dev until reinjection. When the verdict is reinjected later, br_netif_receive_skb() re-enters the receive path with skb->dev still pointing at the freed bridge master, triggering a use-after-free. Store skb->dev in the queue entry, hold a reference on it for the queue lifetime, and use the saved device when dropping queued packets during NETDEV_DOWN handling.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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基金会开源的操作系统Linux所使用的内核。 Linux kernel 4.7版本存在安全漏洞，该漏洞源于netfilter: nf_queue组件在桥接数据包排队期间未能保持skb->dev引用，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 ac28634456867b23b95faccba7997a62ec430603 ~ 950d809f154dca04e5fbe5d3c8b9c5e44769cd57 -
Linux Linux 4.7 -

II. Public POCs for CVE-2026-52912

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III. Intelligence Information for CVE-2026-52912

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Patches & Fixes for CVE-2026-52912 (8)

Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total

CVE-2026-53045 9.8 CRITICAL memory: tegra124-emc: Fix dll_change check
CVE-2026-52914 9.8 CRITICAL batman-adv: fix fragment reassembly length accounting
CVE-2026-53002 9.8 CRITICAL netfilter: conntrack: remove sprintf usage
CVE-2026-52993 9.8 CRITICAL tipc: fix double-free in tipc_buf_append()
CVE-2026-53046 9.8 CRITICAL ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-53049 9.8 CRITICAL gfs2: add some missing log locking
CVE-2026-52955 9.8 CRITICAL libceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-52982 9.8 CRITICAL net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-53006 9.8 CRITICAL ipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-52931 9.8 CRITICAL batman-adv: tp_meter: avoid use of uninit sender vars
CVE-2026-53010 9.8 CRITICAL ksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-52924 9.8 CRITICAL sctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-53086 9.8 CRITICAL net: bcmgenet: fix racing timeout handler
CVE-2026-52989 9.8 CRITICAL nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-53055 9.8 CRITICAL crypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-52986 9.8 CRITICAL netfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-53088 9.8 CRITICAL net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-52999 9.1 CRITICAL netfilter: nfnetlink_osf: fix out-of-bounds read on option matching
CVE-2026-53043 9.1 CRITICAL ocfs2/dlm: validate qr_numregions in dlm_match_regions()
CVE-2026-52958 9.1 CRITICAL libceph: Fix potential out-of-bounds access in osdmap_decode()

Showing top 20 of 219 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-52912

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