CVE-2026-52984

net/sched: netem: fix queue limit check to include reordered packets

MEDIUM

5.5

CVSS Score

Published: June 24, 2026 at 04:28 PM UTC

Updated: July 14, 2026 at 05:04 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v ≥ 5.4.2885.10.232 ≤ v < 5.10.2585.15.175 ≤ v < 5.15.2095.4.288 ≤ v < 5.56.1.121 ≤ v < 6.1.1756.12.6 ≤ v < 6.12.916.13 ≤ v < 6.18.336.13 ≤ v < 7.0.106.13 ≤ v < 7.16.13.1 ≤ v < 6.18.336.19 ≤ v < 7.0.106.6.67 ≤ v < 6.6.14110df49cfca73dfbbdb6c4150d859f7e8926ae427216509dda290f6db92c816dd54b83c1df9da9e76356078a5c55ec8d2061fcc009fb8599f5b0527f93824c5fad18eeb7abe0c4fc966f29959552dca3e5.10.232 5.15.175 5.4.288 6.1.121 6.12.6 6.13 6.13 rc3 6.13 rc4 6.13 rc5 6.13 rc6 6.13 rc7 6.6.67 7.1 rc183c6ab12f08dcc09d4c5ac86fdb89736b28f1d31c2047b0e216c8edce227d7c42f99ac2877dad0e4f8d4bc455047cf3903cd6f85f49978987dbb3027

Vendor states this is fixed in 0f875d52db4c921da610e481b72f03cc82fdcb72 (fixed)

Vendor states this is fixed in 39a66e83ea41fe845631eeb8d326953de27d13f9 (fixed)

Vendor states this is fixed in 4185701fcce6b426b6c3630b25330dddd9c47b0d (fixed)

Vendor states this is fixed in 54b5dbacd00dedffd5e2eed76de1c3839996b5e6 (fixed)

Vendor states this is fixed in 74fcd8e127200a50ee22ba2b45c164722bdb9177 (fixed)

Vendor states this is fixed in 8450462eaf91d5d2a9e863507b16d18e814baef3 (fixed)

Vendor states this is fixed in 936a7dd87251f6f3e88983350833edf60fe6a80b (fixed)

Vendor states this is fixed in ef9a41b3870fb90577da5b2de5bd140022d4021e (fixed)

Vendor states this is fixed in 5.10.258 (unaffected)

Vendor states this is fixed in 5.15.209 (unaffected)

Affected range stops below 5.5, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 6.1.175 (unaffected)