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CVE-2026-90143— net: kcm: Hold RCU read lock while running BPF parser

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.

在 Linux 内核中，以下漏洞已得到修复： 网络：kcm：在运行 BPF 解析器期间持有 RCU 读锁 调用 以阻止 CPU 迁移，但未建立 RCU 读侧临界区（critical section）。因此，当从 KCM 字符串解析器（strparser）BPF 程序调用 BPF map 操作时，可能触发 警告。 修复措施： 在运行该 BPF 程序期间持有 RCU 读锁。

CVSS 7.8 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1015

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 9b73896a81dc68a638a011877b7344b252f92276< 37108861cf7bd909d4a372069bcd61c8f489e232 affected
9b73896a81dc68a638a011877b7344b252f92276< 3c70d27e792a28bca650ddd8a9aa0fe3591ffec5 affected
9b73896a81dc68a638a011877b7344b252f92276< 1d26a6e007d46babc7fa76e5a157dccf86cd55c0 affected
9b73896a81dc68a638a011877b7344b252f92276< b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2 affected
9b73896a81dc68a638a011877b7344b252f92276< 21526f8a191a3c50622b8c10bd927870d780eae4 affected
9b73896a81dc68a638a011877b7344b252f92276< 292846223eaddba890e40699d2ab82ee5671798c affected
9b73896a81dc68a638a011877b7344b252f92276< f392affef3c9ce64dfdde794df0579e0a7793440 affected
9b73896a81dc68a638a011877b7344b252f92276< b0346dd64e4905291cc9c479f2e6cf1884ced4e6 affected
… +10 more rows
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I. Basic Information for CVE-2026-90143

Vulnerability Information
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Vulnerability Title
net: kcm: Hold RCU read lock while running BPF parser
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: kcm: Hold RCU read lock while running BPF parser kcm_parse_func_strparser() calls bpf_prog_run_pin_on_cpu() which prevents CPU migration, but does not establish an RCU read-side critical section. Consequently, BPF map operations can trigger WARN_ON_ONCE(!bpf_rcu_lock_held()) when called from the KCM strparser program. Hold the RCU read lock while running the program.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 9b73896a81dc68a638a011877b7344b252f92276 ~ 37108861cf7bd909d4a372069bcd61c8f489e232 -
Linux Linux 4.9 -

II. Public POCs for CVE-2026-90143

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III. Intelligence Information for CVE-2026-90143

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Patches & Fixes for CVE-2026-90143 (8)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90255 8.8 HIGH Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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