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CVE-2025-38637— net_sched: skbprio: Remove overly strict queue assertions

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skbprio队列断言过于严格，可能导致不一致状态。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux aea5f654e6b78a0c976f7a25950155932c77a53f< 7abc8318ce0712182bf0783dcfdd9a6a8331160e affected
aea5f654e6b78a0c976f7a25950155932c77a53f< 1284733bab736e598341f1d3f3b94e2a322864a8 affected
aea5f654e6b78a0c976f7a25950155932c77a53f< 32ee79682315e6d3c99947b3f38b078a09a66919 affected
aea5f654e6b78a0c976f7a25950155932c77a53f< 1dcc144c322a8d526b791135604c0663f1af9d85 affected
aea5f654e6b78a0c976f7a25950155932c77a53f< 864ca690ff135078d374bd565b9872f161c614bc affected
aea5f654e6b78a0c976f7a25950155932c77a53f< 2f35b7673a3aa3d09b3eb05811669622ebaa98ca affected
aea5f654e6b78a0c976f7a25950155932c77a53f< 2286770b07cb5268c03d11274b8efd43dff0d380 affected
aea5f654e6b78a0c976f7a25950155932c77a53f< 034b293bf17c124fec0f0e663f81203b00aa7a50 affected
… +12 more rows
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I. Basic Information for CVE-2025-38637

Vulnerability Information
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Vulnerability Title
net_sched: skbprio: Remove overly strict queue assertions
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net_sched: skbprio: Remove overly strict queue assertions In the current implementation, skbprio enqueue/dequeue contains an assertion that fails under certain conditions when SKBPRIO is used as a child qdisc under TBF with specific parameters. The failure occurs because TBF sometimes peeks at packets in the child qdisc without actually dequeuing them when tokens are unavailable. This peek operation creates a discrepancy between the parent and child qdisc queue length counters. When TBF later receives a high-priority packet, SKBPRIO's queue length may show a different value than what's reflected in its internal priority queue tracking, triggering the assertion. The fix removes this overly strict assertions in SKBPRIO, they are not necessary at all.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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skbprio队列断言过于严格，可能导致不一致状态。
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 aea5f654e6b78a0c976f7a25950155932c77a53f ~ 7abc8318ce0712182bf0783dcfdd9a6a8331160e -
Linux Linux 4.19 -

II. Public POCs for CVE-2025-38637

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III. Intelligence Information for CVE-2025-38637

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Other References for CVE-2025-38637 (7)

Same Patch Batch · Linux · 2025-04-18 · 23 CVEs total

CVE-2025-39930 8.4 HIGH ASoC: simple-card-utils: Don't use __free(device_node) at graph_util_parse_dai()
CVE-2025-40364 7.8 HIGH io_uring: fix io_req_prep_async with provided buffers
CVE-2025-37785 7.8 HIGH ext4: fix OOB read when checking dotdot dir
CVE-2025-37893 7.8 HIGH LoongArch: BPF: Fix off-by-one error in build_prologue()
CVE-2025-37838 7.8 HIGH HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Con
CVE-2025-39688 7.5 HIGH nfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid()
CVE-2025-39735 7.1 HIGH jfs: fix slab-out-of-bounds read in ea_get()
CVE-2025-38479 dmaengine: fsl-edma: free irq correctly in remove path
CVE-2025-37860 sfc: fix NULL dereferences in ef100_process_design_param()
CVE-2025-37925 jfs: reject on-disk inodes of an unsupported type
CVE-2025-40325 md/raid10: wait barrier before returning discard request with REQ_NOWAIT
CVE-2025-38049 x86/resctrl: Fix allocation of cleanest CLOSID on platforms with no monitors
CVE-2025-38104 drm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversi
CVE-2025-38152 remoteproc: core: Clear table_sz when rproc_shutdown
CVE-2025-38240 drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr
CVE-2025-40014 objtool, spi: amd: Fix out-of-bounds stack access in amd_set_spi_freq()
CVE-2025-38575 ksmbd: use aead_request_free to match aead_request_alloc
CVE-2025-39728 clk: samsung: Fix UBSAN panic in samsung_clk_init()
CVE-2025-39755 staging: gpib: Fix cb7210 pcmcia Oops
CVE-2025-39778 objtool, nvmet: Fix out-of-bounds stack access in nvmet_ctrl_state_show()

Showing top 20 of 23 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38637

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