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CVE-2026-90107— net/smc: free pending qentry in smc_llc_flow_stop() before memset

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.

以下是该 Linux 内核漏洞描述的中文翻译： 在 Linux 内核中，以下漏洞已得到修复： net/smc: 在 smc_llc_flow_stop() 中 memset 之前释放 pending qentry 使用“盲”memset 来重置 flow 结构体： 如果此时 不为 NULL，其指针会被直接覆盖，而对应的内存分配未被释放，从而导致一个 kmalloc 对象发生内存泄漏。 一个晚到的重复 CONFIRM_LINK 或 ADD_LINK_CONT 消息，可能在合法消息已通过 被等待者消费（该函数将指针置为

AI Predicted 2.5 Difficulty: Theoretical EPSS 0.21% · P11

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 555da9af827d95134656fa459c8f3ece04dd867a< 8e3deb150a5237b672c4579e69a6deb02027dbed affected
555da9af827d95134656fa459c8f3ece04dd867a< 11bc373ee6630709f0c2da2e7860c23d503c9e9d affected
555da9af827d95134656fa459c8f3ece04dd867a< 032aec7d03c9102616b98fea74f8f7145e7f867c affected
555da9af827d95134656fa459c8f3ece04dd867a< 957dba2b8b5aebfe09caa6a6b22b958079082eab affected
555da9af827d95134656fa459c8f3ece04dd867a< f03aa5d36ae3c4068a1c3885146be99aa7fd9307 affected
555da9af827d95134656fa459c8f3ece04dd867a< 0879ea157acc1ac6752f6fcb755d1f91a2359238 affected
555da9af827d95134656fa459c8f3ece04dd867a< 5ff429dd6725fa6c1e17a4ed0be8ab675f67a98b affected
555da9af827d95134656fa459c8f3ece04dd867a< 5ee0ceddc7785c6dcf4a8107fef01f0414a354f4 affected
… +10 more rows
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I. Basic Information for CVE-2026-90107

Vulnerability Information
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Vulnerability Title
net/smc: free pending qentry in smc_llc_flow_stop() before memset
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/smc: free pending qentry in smc_llc_flow_stop() before memset smc_llc_flow_stop() resets a flow struct with a blind memset: spin_lock_bh(&lgr->llc_flow_lock); memset(flow, 0, sizeof(*flow)); flow->type = SMC_LLC_FLOW_NONE; spin_unlock_bh(&lgr->llc_flow_lock); If flow->qentry is non-NULL at this point the pointer is overwritten without the allocation being freed, leaking one kmalloc object. A late-arriving duplicate CONFIRM_LINK or ADD_LINK_CONT message can set flow->qentry after the legitimate message has been consumed by the waiter via smc_llc_flow_qentry_clr() (which NULLs the pointer but leaves flow->type non-zero) but before the flow completes and smc_llc_flow_stop() runs. In that window the duplicate is stashed into flow->qentry, and then lost when smc_llc_flow_stop() zeros the struct. Call smc_llc_flow_qentry_del() inside the lock before the memset. smc_llc_flow_qentry_del() already checks flow->qentry before freeing, so the normal case where no entry is pending is a no-op.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 555da9af827d95134656fa459c8f3ece04dd867a ~ 8e3deb150a5237b672c4579e69a6deb02027dbed -
Linux Linux 5.8 -

II. Public POCs for CVE-2026-90107

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III. Intelligence Information for CVE-2026-90107

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Patches & Fixes for CVE-2026-90107 (8)

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

CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
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-2026-90413 9.1 CRITICAL IB/isert: reject login 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-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90107

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