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CVE-2026-93163— hwrng: core - fix rng list on registration error

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，已修复以下漏洞： hwrng: 核心 - 修复注册错误时的 rng 列表处理 执行以下操作： 1. 检查 rng 是否已设置名称和读取方法 2. 检查该名称是否已存在 3. 将 rng 添加到全局 4. 可能会尝试将 rng 设置为 如果第 4 步失败，函数返回错误。但它并未将该 rng 从 中移除，导致产生悬空引用；如果调用方在注册失败后释放 rng，就可能引发“使用已释放内存”（use-after-free）问题。 修复方法：增加一个 清理步骤，确保在注册失败时正确地将 rng 从列表中

AI Predicted 5.5 Difficulty: Hard EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 2bbb6983887fefc8026beab01198d30f47b7bd22< de4f1bcb61a73cc896decdbd27d61a34add93b53 affected
2bbb6983887fefc8026beab01198d30f47b7bd22< cf293c9c7424de0d04b51367d07f40570ce80231 affected
2bbb6983887fefc8026beab01198d30f47b7bd22< bee8d1fcdc8f389b595b0a4cf6fe8440f499458a affected
2bbb6983887fefc8026beab01198d30f47b7bd22< 3a5834db2b1ce25649f330e78efe1ccde78967fd affected
42802952a2725f85f7e36ee3b29593af5fe87197 affected
4.9.320< 4.10 affected
4.14 affected
< 4.14 unaffected
… +4 more rows
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I. Basic Information for CVE-2026-93163

Vulnerability Information
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Vulnerability Title
hwrng: core - fix rng list on registration error
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: hwrng: core - fix rng list on registration error hwrng_register(rng) does the following: 1. Checks if rng has name and read methods set 2. Checks if the name already exists 3. Adds rng to global rng_list 4. May try to set rng to current_rng If step 4 fails, it returns an error. However, it does not remove the rng from rng_list, causing a dangling reference which can result in use-after-free if the caller frees rng, since registration failed. Add a list_del_init() cleanup step.
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 2bbb6983887fefc8026beab01198d30f47b7bd22 ~ de4f1bcb61a73cc896decdbd27d61a34add93b53 -
Linux Linux 4.14 -

II. Public POCs for CVE-2026-93163

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III. Intelligence Information for CVE-2026-93163

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Patches & Fixes for CVE-2026-93163 (4)

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

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
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-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
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-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
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-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race

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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