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CVE-2025-38595— xen: fix UAF in dmabuf_exp_from_pages()

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xen模块在dmabuf_exp_from_pages函数中可能导致释放后重用。

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux a240d6e42e28c34fdc34b3a98ca838a31c939901< e5907885260401bba300d4d18d79875c05b82651 affected
a240d6e42e28c34fdc34b3a98ca838a31c939901< 3edfd2353f301bfffd5ee41066e37320a59ccc2d affected
a240d6e42e28c34fdc34b3a98ca838a31c939901< d59d49af4aeed9a81e673e37c26c6a3bacf1a181 affected
a240d6e42e28c34fdc34b3a98ca838a31c939901< 532c8b51b3a8676cbf533a291f8156774f30ea87 affected
4.19 affected
< 4.19 unaffected
6.12.42≤ 6.12.* unaffected
6.15.10≤ 6.15.* unaffected
… +2 more rows
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I. Basic Information for CVE-2025-38595

Vulnerability Information
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Vulnerability Title
xen: fix UAF in dmabuf_exp_from_pages()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xen: fix UAF in dmabuf_exp_from_pages() [dma_buf_fd() fixes; no preferences regarding the tree it goes through - up to xen folks] As soon as we'd inserted a file reference into descriptor table, another thread could close it. That's fine for the case when all we are doing is returning that descriptor to userland (it's a race, but it's a userland race and there's nothing the kernel can do about it). However, if we follow fd_install() with any kind of access to objects that would be destroyed on close (be it the struct file itself or anything destroyed by its ->release()), we have a UAF. dma_buf_fd() is a combination of reserving a descriptor and fd_install(). gntdev dmabuf_exp_from_pages() calls it and then proceeds to access the objects destroyed on close - starting with gntdev_dmabuf itself. Fix that by doing reserving descriptor before anything else and do fd_install() only when everything had been set up.
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xen模块在dmabuf_exp_from_pages函数中可能导致释放后重用。
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 a240d6e42e28c34fdc34b3a98ca838a31c939901 ~ e5907885260401bba300d4d18d79875c05b82651 -
Linux Linux 4.19 -

II. Public POCs for CVE-2025-38595

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III. Intelligence Information for CVE-2025-38595

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Same Patch Batch · Linux · 2025-08-19 · 59 CVEs total

CVE-2025-38561 9.8 CRITICAL ksmbd: fix Preauh_HashValue race condition
CVE-2025-38566 9.8 CRITICAL sunrpc: fix handling of server side tls alerts
CVE-2025-38560 9.3 CRITICAL x86/sev: Evict cache lines during SNP memory validation
CVE-2025-38601 8.8 HIGH wifi: ath11k: clear initialized flag for deinit-ed srng lists
CVE-2025-38600 8.8 HIGH wifi: mt76: mt7925: fix off by one in mt7925_mcu_hw_scan()
CVE-2025-38599 8.8 HIGH wifi: mt76: mt7996: Fix possible OOB access in mt7996_tx()
CVE-2025-38592 8.8 HIGH Bluetooth: hci_devcd_dump: fix out-of-bounds via dev_coredumpv
CVE-2025-38608 8.6 HIGH bpf, ktls: Fix data corruption when using bpf_msg_pop_data() in ktls
CVE-2025-38574 8.6 HIGH pptp: ensure minimal skb length in pptp_xmit()
CVE-2025-38571 8.2 HIGH sunrpc: fix client side handling of tls alerts
CVE-2025-38596 7.8 HIGH drm/panthor: Fix UAF in panthor_gem_create_with_handle() debugfs code
CVE-2025-38598 7.8 HIGH drm/amdgpu: fix use-after-free in amdgpu_userq_suspend+0x51a/0x5a0
CVE-2025-38607 7.8 HIGH bpf: handle jset (if a & b ...) as a jump in CFG computation
CVE-2025-38614 7.8 HIGH eventpoll: Fix semi-unbounded recursion
CVE-2025-38615 7.8 HIGH fs/ntfs3: cancle set bad inode after removing name fails
CVE-2025-38604 7.8 HIGH wifi: rtl818x: Kill URBs before clearing tx status queue
CVE-2025-38586 7.8 HIGH bpf, arm64: Fix fp initialization for exception boundary
CVE-2025-38582 7.8 HIGH RDMA/hns: Fix double destruction of rsv_qp
CVE-2025-38580 7.8 HIGH ext4: fix inode use after free in ext4_end_io_rsv_work()
CVE-2025-38579 7.8 HIGH f2fs: fix KMSAN uninit-value in extent_info usage

Showing top 20 of 59 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38595

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