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CVE-2025-38477— net/sched: sch_qfq: Fix race condition on qfq_aggregate

EPSS 0.02% · P5
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I. Basic Information for CVE-2025-38477

Vulnerability Information
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Vulnerability Title
net/sched: sch_qfq: Fix race condition on qfq_aggregate
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.
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qfq_aggregate竞争条件，可能导致空指针取消引用或释放后重用。
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 462dbc9101acd38e92eda93c0726857517a24bbd ~ aa7a22c4d678bf649fd3a1d27debec583563414d -
LinuxLinux 3.8 -

II. Public POCs for CVE-2025-38477

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III. Intelligence Information for CVE-2025-38477

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Same Patch Batch · Linux · 2025-07-28 · 29 CVEs total

CVE-2025-38484iio: backend: fix out-of-bound write
CVE-2025-38497usb: gadget: configfs: Fix OOB read on empty string write
CVE-2025-38496dm-bufio: fix sched in atomic context
CVE-2025-38495HID: core: ensure the allocated report buffer can contain the reserved report ID
CVE-2025-38494HID: core: do not bypass hid_hw_raw_request
CVE-2025-38493tracing/osnoise: Fix crash in timerlat_dump_stack()
CVE-2025-38492netfs: Fix race between cache write completion and ALL_QUEUED being set
CVE-2025-38491mptcp: make fallback action and fallback decision atomic
CVE-2025-38490net: libwx: remove duplicate page_pool_put_full_page()
CVE-2025-38489s390/bpf: Fix bpf_arch_text_poke() with new_addr == NULL again
CVE-2025-38488smb: client: fix use-after-free in crypt_message when using async crypto
CVE-2025-38487soc: aspeed: lpc-snoop: Don't disable channels that aren't enabled
CVE-2025-38485iio: accel: fxls8962af: Fix use after free in fxls8962af_fifo_flush
CVE-2025-38486soundwire: Revert "soundwire: qcom: Add set_channel_map api support"
CVE-2025-38468net/sched: Return NULL when htb_lookup_leaf encounters an empty rbtree
CVE-2025-38483comedi: das16m1: Fix bit shift out of bounds
CVE-2025-38482comedi: das6402: Fix bit shift out of bounds
CVE-2025-38481comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
CVE-2025-38480comedi: Fix use of uninitialized data in insn_rw_emulate_bits()
CVE-2025-38478comedi: Fix initialization of data for instructions that write to subdevice

Showing top 20 of 29 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38477

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