CVE-2025-39871 — Use After Free in Linux

CWE-416 — Use After Free22 documents6 sources
Severity
7.8HIGHNVD
OSV3.2
EPSS
0.0%
top 94.73%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
LinuxLinux KernelDebian Linux+1 more
Timeline
PublishedSep 23
Latest updateApr 9

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Remove improper idxd_free The call to idxd_free() introduces a duplicate put_device() leading to a reference count underflow: refcount_t: underflow; use-after-free. WARNING: CPU: 15 PID: 4428 at lib/refcount.c:28 refcount_warn_saturate+0xbe/0x110 ... Call Trace: idxd_remove+0xe4/0x120 [idxd] pci_device_remove+0x3f/0xb0 device_release_driver_internal+0x197/0x200 driver_detach+0x48/0x90 bus_remove_driver+0x74/0…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages6 packages

▶NVDlinux/linux_kernel6.1.140 — 6.2+6
▶Debianlinux/linux_kernel< 6.1.162-1+2
▶Ubuntulinux/linux_kernel< 6.8.0-106.106
▶CVEListV5linux/linux68ac5a01f635b3791196fd1c39bc48497252c36f — 24414bbcb37e1af95190af36c21ae51d497e1a9e+6
▶debiandebian/linux< linux 6.1.162-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

10
OSV
linux-raspi, linux-raspi-realtime vulnerabilities↗2026-04-01
▶
OSV
linux-azure-6.8 vulnerabilities↗2026-03-25
▶
OSV
linux-azure vulnerabilities↗2026-03-25
▶
OSV
linux-aws-6.8 vulnerabilities↗2026-03-23
▶
OSV
linux-realtime, linux-realtime-6.8 vulnerabilities↗2026-03-17
▶

📋Vendor Advisories

11
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities↗2026-04-09
▶
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities↗2026-04-01
▶
Ubuntu
Linux kernel (Azure) vulnerabilities↗2026-03-25
▶
Ubuntu
Linux kernel (Azure) vulnerabilities↗2026-03-25
▶
Ubuntu
Linux kernel (AWS) vulnerabilities↗2026-03-23
▶
CVE-2025-39871 — Use After Free in Linux | cvebase