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CVE-2025-38108— net_sched: red: fix a race in __red_change()

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于net_sched red在__red_change中竞争条件。

CVSS 7.8 · High EPSS 0.16% · P4

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0c8d13ac96070000da33f394f45e9c19638483c5< 2790c4ec481be45a80948d059cd7c9a06bc37493 affected
0c8d13ac96070000da33f394f45e9c19638483c5< a1bf6a4e9264a685b0e642994031f9c5aad72414 affected
0c8d13ac96070000da33f394f45e9c19638483c5< 110a47efcf23438ff8d31dbd9c854fae2a48bf98 affected
0c8d13ac96070000da33f394f45e9c19638483c5< f569984417a4e12c67366e69bdcb752970de921d affected
0c8d13ac96070000da33f394f45e9c19638483c5< 2a71924ca4af59ffc00f0444732b6cd54b153d0e affected
0c8d13ac96070000da33f394f45e9c19638483c5< 4b755305b2b0618e857fdadb499365b5f2e478d1 affected
0c8d13ac96070000da33f394f45e9c19638483c5< 444ad445df5496a785705019268a8a84b84484bb affected
0c8d13ac96070000da33f394f45e9c19638483c5< 85a3e0ede38450ea3053b8c45d28cf55208409b8 affected
… +10 more rows
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I. Basic Information for CVE-2025-38108

Vulnerability Information
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Vulnerability Title
net_sched: red: fix a race in __red_change()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net_sched: red: fix a race in __red_change() Gerrard Tai reported a race condition in RED, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于net_sched red在__red_change中竞争条件。
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 0c8d13ac96070000da33f394f45e9c19638483c5 ~ 2790c4ec481be45a80948d059cd7c9a06bc37493 -
Linux Linux 5.0 -

II. Public POCs for CVE-2025-38108

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III. Intelligence Information for CVE-2025-38108

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Same Patch Batch · Linux · 2025-07-03 · 78 CVEs total

CVE-2025-38123 9.8 CRITICAL net: wwan: t7xx: Fix napi rx poll issue
CVE-2025-38139 9.8 CRITICAL netfs: Fix oops in write-retry from mis-resetting the subreq iterator
CVE-2025-38120 9.4 CRITICAL netfilter: nf_set_pipapo_avx2: fix initial map fill
CVE-2025-38146 9.4 CRITICAL net: openvswitch: Fix the dead loop of MPLS parse
CVE-2025-38116 7.8 HIGH wifi: ath12k: fix uaf in ath12k_core_init()
CVE-2025-38168 7.8 HIGH perf: arm-ni: Unregister PMUs on probe failure
CVE-2025-38097 7.8 HIGH espintcp: remove encap socket caching to avoid reference leak
CVE-2025-38154 7.8 HIGH bpf, sockmap: Avoid using sk_socket after free when sending
CVE-2025-38106 7.8 HIGH io_uring: fix use-after-free of sq->thread in __io_uring_show_fdinfo()
CVE-2025-38150 7.8 HIGH af_packet: move notifier's packet_dev_mc out of rcu critical section
CVE-2025-38110 7.8 HIGH net/mdiobus: Fix potential out-of-bounds clause 45 read/write access
CVE-2025-38111 7.8 HIGH net/mdiobus: Fix potential out-of-bounds read/write access
CVE-2025-38141 7.8 HIGH dm: fix dm_blk_report_zones
CVE-2025-38107 7.8 HIGH net_sched: ets: fix a race in ets_qdisc_change()
CVE-2025-38115 7.8 HIGH net_sched: sch_sfq: fix a potential crash on gso_skb handling
CVE-2025-38117 7.8 HIGH Bluetooth: MGMT: Protect mgmt_pending list with its own lock
CVE-2025-38118 7.8 HIGH Bluetooth: MGMT: Fix UAF on mgmt_remove_adv_monitor_complete
CVE-2025-38133 7.8 HIGH iio: adc: ad4851: fix ad4858 chan pointer handling
CVE-2025-38129 7.8 HIGH page_pool: Fix use-after-free in page_pool_recycle_in_ring
CVE-2025-38127 7.8 HIGH ice: fix Tx scheduler error handling in XDP callback

Showing top 20 of 78 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38108

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