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CVE-2025-38620— zloop: fix KASAN use-after-free of tag set

EPSS 0.03% · P7
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I. Basic Information for CVE-2025-38620

Vulnerability Information
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Vulnerability Title
zloop: fix KASAN use-after-free of tag set
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: zloop: fix KASAN use-after-free of tag set When a zoned loop device, or zloop device, is removed, KASAN enabled kernel reports "BUG KASAN use-after-free" in blk_mq_free_tag_set(). The BUG happens because zloop_ctl_remove() calls put_disk(), which invokes zloop_free_disk(). The zloop_free_disk() frees the memory allocated for the zlo pointer. However, after the memory is freed, zloop_ctl_remove() calls blk_mq_free_tag_set(&zlo->tag_set), which accesses the freed zlo. Hence the KASAN use-after-free. zloop_ctl_remove() put_disk(zlo->disk) put_device() kobject_put() ... zloop_free_disk() kvfree(zlo) blk_mq_free_tag_set(&zlo->tag_set) To avoid the BUG, move the call to blk_mq_free_tag_set(&zlo->tag_set) from zloop_ctl_remove() into zloop_free_disk(). This ensures that the tag_set is freed before the call to kvfree(zlo).
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zloop设备移除时释放后重用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux eb0570c7df23c2f32fe899fcdaf8fca9a5ecd51e ~ c7c87046b41a9ef28ee7ac476c369da5b5228bc5 -
LinuxLinux 6.16 -

II. Public POCs for CVE-2025-38620

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III. Intelligence Information for CVE-2025-38620

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Same Patch Batch · Linux · 2025-08-22 · 60 CVEs total

CVE-2025-38635clk: davinci: Add NULL check in davinci_lpsc_clk_register()
CVE-2025-38616tls: handle data disappearing from under the TLS ULP
CVE-2025-38619media: ti: j721e-csi2rx: fix list_del corruption
CVE-2025-38621md: make rdev_addable usable for rcu mode
CVE-2025-38622net: drop UFO packets in udp_rcv_segment()
CVE-2025-38618vsock: Do not allow binding to VMADDR_PORT_ANY
CVE-2025-38632pinmux: fix race causing mux_owner NULL with active mux_usecount
CVE-2025-38631clk: imx95-blk-ctl: Fix synchronous abort
CVE-2025-38633clk: spacemit: mark K1 pll1_d8 as critical
CVE-2025-38634power: supply: cpcap-charger: Fix null check for power_supply_get_by_name
CVE-2025-38630fbdev: imxfb: Check fb_add_videomode to prevent null-ptr-deref
CVE-2025-38636rv: Use strings in da monitors tracepoints
CVE-2025-38638ipv6: add a retry logic in net6_rt_notify()
CVE-2025-38639netfilter: xt_nfacct: don't assume acct name is null-terminated
CVE-2025-38640bpf: Disable migration in nf_hook_run_bpf().
CVE-2025-38641Bluetooth: btusb: Fix potential NULL dereference on kmalloc failure
CVE-2025-38642wifi: mac80211: fix WARN_ON for monitor mode on some devices
CVE-2025-38643wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()
CVE-2025-38644wifi: mac80211: reject TDLS operations when station is not associated
CVE-2025-38645net/mlx5: Check device memory pointer before usage

Showing top 20 of 60 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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