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CVE-2026-52984— net/sched: netem: fix queue limit check to include reordered packets

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netem队列限制检查不完整，未统计重排序路径中的包，可能导致总队列占用超过限制。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1040 · Network Sniffing

Affected Version Matrix 25

VendorProduct Version RangeStatus
Linux Linux 216509dda290f6db92c816dd54b83c1df9da9e76< 0f875d52db4c921da610e481b72f03cc82fdcb72 affected
c2047b0e216c8edce227d7c42f99ac2877dad0e4< ef9a41b3870fb90577da5b2de5bd140022d4021e affected
10df49cfca73dfbbdb6c4150d859f7e8926ae427< 74fcd8e127200a50ee22ba2b45c164722bdb9177 affected
3824c5fad18eeb7abe0c4fc966f29959552dca3e< 39a66e83ea41fe845631eeb8d326953de27d13f9 affected
356078a5c55ec8d2061fcc009fb8599f5b0527f9< 54b5dbacd00dedffd5e2eed76de1c3839996b5e6 affected
f8d4bc455047cf3903cd6f85f49978987dbb3027< 8450462eaf91d5d2a9e863507b16d18e814baef3 affected
f8d4bc455047cf3903cd6f85f49978987dbb3027< 936a7dd87251f6f3e88983350833edf60fe6a80b affected
f8d4bc455047cf3903cd6f85f49978987dbb3027< 4185701fcce6b426b6c3630b25330dddd9c47b0d affected
… +17 more rows
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I. Basic Information for CVE-2026-52984

Vulnerability Information
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Vulnerability Title
net/sched: netem: fix queue limit check to include reordered packets
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: fix queue limit check to include reordered packets The queue limit check in netem_enqueue() uses q->t_len which only counts packets in the internal tfifo. Packets placed in sch->q by the reorder path (__qdisc_enqueue_head) are not counted, allowing the total queue occupancy to exceed sch->limit under reordering. Include sch->q.qlen in the limit check.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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netem队列限制检查不完整，未统计重排序路径中的包，可能导致总队列占用超过限制。
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 216509dda290f6db92c816dd54b83c1df9da9e76 ~ 0f875d52db4c921da610e481b72f03cc82fdcb72 -
Linux Linux 6.13 -

II. Public POCs for CVE-2026-52984

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III. Intelligence Information for CVE-2026-52984

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Patches & Fixes for CVE-2026-52984 (7)

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

CVE-2026-53049 9.8 CRITICAL gfs2: add some missing log locking
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-2026-53002 9.8 CRITICAL netfilter: conntrack: remove sprintf usage
CVE-2026-53006 9.8 CRITICAL ipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-53045 9.8 CRITICAL memory: tegra124-emc: Fix dll_change check
CVE-2026-53086 9.8 CRITICAL net: bcmgenet: fix racing timeout handler
CVE-2026-53046 9.8 CRITICAL ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-52955 9.8 CRITICAL libceph: Fix potential out-of-bounds access in crush_decode()
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-2026-52914 9.8 CRITICAL batman-adv: fix fragment reassembly length accounting
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-2026-52931 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()

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-2026-52984

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