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CVE-2025-38095— dma-buf: insert memory barrier before updating num_fences

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dma-buf在更新num_fences前未插入内存屏障，可能导致空指针取消引用。

CVSS 7.8 · High EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux a590d0fdbaa56f482ff515e1040b6d9b1b200d63< 90eb79c4ed98a4e24a62ccf61c199ab0f680fa8f affected
a590d0fdbaa56f482ff515e1040b6d9b1b200d63< d0b7f11dd68b593bd970e5735be00e8d89bace30 affected
a590d0fdbaa56f482ff515e1040b6d9b1b200d63< 3becc659f9cb76b481ad1fb71f54d5c8d6332d3f affected
a590d0fdbaa56f482ff515e1040b6d9b1b200d63< c9d2b9a80d06a58f37e0dc8c827075639b443927 affected
a590d0fdbaa56f482ff515e1040b6d9b1b200d63< fe1bebd0edb22e3536cbc920ec713331d1367ad4 affected
a590d0fdbaa56f482ff515e1040b6d9b1b200d63< 08680c4dadc6e736c75bc2409d833f03f9003c51 affected
a590d0fdbaa56f482ff515e1040b6d9b1b200d63< 72c7d62583ebce7baeb61acce6057c361f73be4a affected
5.0 affected
… +8 more rows
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I. Basic Information for CVE-2025-38095

Vulnerability Information
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Vulnerability Title
dma-buf: insert memory barrier before updating num_fences
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dma-buf: insert memory barrier before updating num_fences smp_store_mb() inserts memory barrier after storing operation. It is different with what the comment is originally aiming so Null pointer dereference can be happened if memory update is reordered.
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dma-buf在更新num_fences前未插入内存屏障，可能导致空指针取消引用。
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 a590d0fdbaa56f482ff515e1040b6d9b1b200d63 ~ 90eb79c4ed98a4e24a62ccf61c199ab0f680fa8f -
Linux Linux 5.0 -

II. Public POCs for CVE-2025-38095

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III. Intelligence Information for CVE-2025-38095

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Patches & Fixes for CVE-2025-38095 (1)

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-2025-38166 7.8 HIGH bpf: fix ktls panic with sockmap
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-2025-38107 7.8 HIGH net_sched: ets: fix a race in ets_qdisc_change()
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-2025-38108 7.8 HIGH net_sched: red: fix a race in __red_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-2025-38095

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