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CVE-2026-53086— net: bcmgenet: fix racing timeout handler

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 4.2版本存在安全漏洞，该漏洞源于bcmgenet_timeout处理器在单个队列超时时会关闭所有TX队列，导致竞争条件。

CVSS 9.8 · Critical EPSS 0.30% · P22

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 13ea657806cf73b379a0109f7042182f47c351a7< e85b0c0a12e967930044608311471b665baa315c affected
13ea657806cf73b379a0109f7042182f47c351a7< e8206538cbaf4f4068e99a4cb1138690a1e00499 affected
13ea657806cf73b379a0109f7042182f47c351a7< 681fdfe823b4f1036ed50b58b8838c7917ea389c affected
13ea657806cf73b379a0109f7042182f47c351a7< c270e2bec3e55a716d25c35341091339457ac883 affected
13ea657806cf73b379a0109f7042182f47c351a7< 7ce1c26aac3b318886a57425f64b522da7389153 affected
13ea657806cf73b379a0109f7042182f47c351a7< 5393b2b5bee2ac51a0043dc7f4ac3475f053d08d affected
4.2 affected
< 4.2 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-53086

Vulnerability Information
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Vulnerability Title
net: bcmgenet: fix racing timeout handler
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: fix racing timeout handler The bcmgenet_timeout handler tries to take down all tx queues when a single queue times out. This is over zealous and causes many race conditions with queues that are still chugging along. Instead lets only restart the timed out queue.
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
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 4.2版本存在安全漏洞，该漏洞源于bcmgenet_timeout处理器在单个队列超时时会关闭所有TX队列，导致竞争条件。
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 13ea657806cf73b379a0109f7042182f47c351a7 ~ e85b0c0a12e967930044608311471b665baa315c -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-53086

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III. Intelligence Information for CVE-2026-53086

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Patches & Fixes for CVE-2026-53086 (5)

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

CVE-2026-53046 9.8 CRITICAL ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-53010 9.8 CRITICAL ksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-53088 9.8 CRITICAL net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-53006 9.8 CRITICAL ipv6: fix possible UAF in icmpv6_rcv()
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-2026-52989 9.8 CRITICAL nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-52986 9.8 CRITICAL netfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-52982 9.8 CRITICAL net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-53045 9.8 CRITICAL memory: tegra124-emc: Fix dll_change check
CVE-2026-52955 9.8 CRITICAL libceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-53049 9.8 CRITICAL gfs2: add some missing log locking
CVE-2026-53055 9.8 CRITICAL crypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-52924 9.8 CRITICAL sctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-52914 9.8 CRITICAL batman-adv: fix fragment reassembly length accounting
CVE-2026-52931 9.8 CRITICAL batman-adv: tp_meter: avoid use of uninit sender vars
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()
CVE-2026-53071 8.8 HIGH Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

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-2026-53086

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