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CVE-2025-21728— bpf: Send signals asynchronously if !preemptible

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bpf_send_signal函数在不可抢占上下文中可能导致睡眠问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1205 · Traffic Signaling

Affected Version Matrix 21

VendorProduct Version RangeStatus
Linux Linux fd29a0242f86b2d95ad666aa9f92a3d0f7bfdab6< feba1308bc5e8e04cee751d39fae8a9b407a9034 affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494< ce51eab2070e295d298f42a2f1db269cd1b56d55 affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494< e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4 affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494< be42a09fe898635b0093c0c8dac1bfabe225c240 affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494< eeef8e65041a031bd8a747a392c14b76a123a12c affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494< 78b97783496b454435639937db3303e900a24d3f affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494< 092fc76b7ab4163e008f9cde596a58dad2108260 affected
1bc7896e9ef44fd77858b3ef0b8a6840be3a4494< 87c544108b612512b254c8f79aa5c0a8546e2cc4 affected
… +13 more rows
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I. Basic Information for CVE-2025-21728

Vulnerability Information
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Vulnerability Title
bpf: Send signals asynchronously if !preemptible
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Send signals asynchronously if !preemptible BPF programs can execute in all kinds of contexts and when a program running in a non-preemptible context uses the bpf_send_signal() kfunc, it will cause issues because this kfunc can sleep. Change `irqs_disabled()` to `!preemptible()`.
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bpf_send_signal函数在不可抢占上下文中可能导致睡眠问题。
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 fd29a0242f86b2d95ad666aa9f92a3d0f7bfdab6 ~ feba1308bc5e8e04cee751d39fae8a9b407a9034 -
Linux Linux 5.6 -

II. Public POCs for CVE-2025-21728

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III. Intelligence Information for CVE-2025-21728

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Patches & Fixes for CVE-2025-21728 (5)

Other References for CVE-2025-21728 (3)

Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-21796 9.8 CRITICAL nfsd: clear acl_access/acl_default after releasing them
CVE-2025-21805 9.8 CRITICAL RDMA/rtrs: Add missing deinit() call
CVE-2025-21707 9.8 CRITICAL mptcp: consolidate suboption status
CVE-2025-21748 9.8 CRITICAL ksmbd: fix integer overflows on 32 bit systems
CVE-2024-58006 9.6 CRITICAL PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()
CVE-2025-21735 8.8 HIGH NFC: nci: Add bounds checking in nci_hci_create_pipe()
CVE-2024-57999 8.8 HIGH powerpc/pseries/iommu: IOMMU incorrectly marks MMIO range in DDW
CVE-2024-57997 8.8 HIGH wifi: wcn36xx: fix channel survey memory allocation size
CVE-2024-57995 8.8 HIGH wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()
CVE-2025-21710 8.2 HIGH tcp: correct handling of extreme memory squeeze
CVE-2024-57973 8.1 HIGH rdma/cxgb4: Prevent potential integer overflow on 32bit
CVE-2025-21760 8.1 HIGH ndisc: extend RCU protection in ndisc_send_skb()
CVE-2025-21766 8.1 HIGH ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2025-21765 8.1 HIGH ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21762 8.1 HIGH arp: use RCU protection in arp_xmit()
CVE-2025-21772 7.8 HIGH partitions: mac: fix handling of bogus partition table
CVE-2025-21730 7.8 HIGH wifi: rtw89: avoid to init mgnt_entry list twice when WoWLAN failed
CVE-2025-21729 7.8 HIGH wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion
CVE-2024-58002 7.8 HIGH media: uvcvideo: Remove dangling pointers
CVE-2024-52560 7.8 HIGH fs/ntfs3: Mark inode as bad as soon as error detected in mi_enum_attr()

Showing top 20 of 177 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21728

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