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CVE-2025-39870— dmaengine: idxd: Fix double free in idxd_setup_wqs()

EPSS 0.02% · P5
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I. Basic Information for CVE-2025-39870

Vulnerability Information
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Vulnerability Title
dmaengine: idxd: Fix double free in idxd_setup_wqs()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix double free in idxd_setup_wqs() The clean up in idxd_setup_wqs() has had a couple bugs because the error handling is a bit subtle. It's simpler to just re-write it in a cleaner way. The issues here are: 1) If "idxd->max_wqs" is <= 0 then we call put_device(conf_dev) when "conf_dev" hasn't been initialized. 2) If kzalloc_node() fails then again "conf_dev" is invalid. It's either uninitialized or it points to the "conf_dev" from the previous iteration so it leads to a double free. It's better to free partial loop iterations within the loop and then the unwinding at the end can handle whole loop iterations. I also renamed the labels to describe what the goto does and not where the goto was located.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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idxd_setup_wqs函数中存在双重释放问题，可能导致内存损坏。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux d584acdf54f409cb7eae1359ae6c12aaabedeed8 ~ 25e6146c2812487a88f619d5ff6efbdcd5b2bc31 -
LinuxLinux 6.15 -

II. Public POCs for CVE-2025-39870

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III. Intelligence Information for CVE-2025-39870

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Same Patch Batch · Linux · 2025-09-23 · 21 CVEs total

CVE-2025-39878ceph: fix crash after fscrypt_encrypt_pagecache_blocks() error
CVE-2025-39887tracing/osnoise: Fix null-ptr-deref in bitmap_parselist()
CVE-2025-39888fuse: Block access to folio overlimit
CVE-2025-39885ocfs2: fix recursive semaphore deadlock in fiemap call
CVE-2025-39886bpf: Tell memcg to use allow_spinning=false path in bpf_timer_init()
CVE-2025-39883mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory
CVE-2025-39884btrfs: fix subvolume deletion lockup caused by inodes xarray race
CVE-2025-39882drm/mediatek: fix potential OF node use-after-free
CVE-2025-39880libceph: fix invalid accesses to ceph_connection_v1_info
CVE-2025-39881kernfs: Fix UAF in polling when open file is released
CVE-2025-39868erofs: fix runtime warning on truncate_folio_batch_exceptionals()
CVE-2025-39879ceph: always call ceph_shift_unused_folios_left()
CVE-2025-39877mm/damon/sysfs: fix use-after-free in state_show()
CVE-2025-39876net: fec: Fix possible NPD in fec_enet_phy_reset_after_clk_enable()
CVE-2025-39874macsec: sync features on RTM_NEWLINK
CVE-2025-39875igb: Fix NULL pointer dereference in ethtool loopback test
CVE-2025-39873can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB
CVE-2025-39872hsr: hold rcu and dev lock for hsr_get_port_ndev
CVE-2025-39871dmaengine: idxd: Remove improper idxd_free
CVE-2025-39869dmaengine: ti: edma: Fix memory allocation size for queue_priority_map

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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