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CVE-2026-43069— Bluetooth: hci_ll: Fix firmware leak on error path

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hci_ll驱动在固件下载错误路径中未释放固件，可能导致资源泄漏。

AI Predicted 5.5 Difficulty: Easy EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1535 · Unused/Unsupported Cloud Regions

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 371805522f870986144fcd88727a47858e364a2c< 95e8601af227b2b4390eecf8db6abdb9f6a91f17 affected
371805522f870986144fcd88727a47858e364a2c< e6d95488c8c964d1df0d3e1db44c958706311e86 affected
371805522f870986144fcd88727a47858e364a2c< b2dfbf1b5ff192cefd49574b951a4af9ddd32213 affected
371805522f870986144fcd88727a47858e364a2c< 28904375d54b436a757641fb0331537778c0de5a affected
371805522f870986144fcd88727a47858e364a2c< 5213ef54528dd1ac79b846e30d8f72ce092794aa affected
371805522f870986144fcd88727a47858e364a2c< 9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b affected
371805522f870986144fcd88727a47858e364a2c< a7803df606a7d22e896b030f619e1d9d20ae0c6b affected
371805522f870986144fcd88727a47858e364a2c< 31148a7be723aa9f2e8fbd62424825ab8d577973 affected
… +10 more rows
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I. Basic Information for CVE-2026-43069

Vulnerability Information
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Vulnerability Title
Bluetooth: hci_ll: Fix firmware leak on error path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ll: Fix firmware leak on error path Smatch reports: drivers/bluetooth/hci_ll.c:587 download_firmware() warn: 'fw' from request_firmware() not released on lines: 544. In download_firmware(), if request_firmware() succeeds but the returned firmware content is invalid (no data or zero size), the function returns without releasing the firmware, resulting in a resource leak. Fix this by calling release_firmware() before returning when request_firmware() succeeded but the firmware content is invalid.
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hci_ll驱动在固件下载错误路径中未释放固件，可能导致资源泄漏。
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 371805522f870986144fcd88727a47858e364a2c ~ 95e8601af227b2b4390eecf8db6abdb9f6a91f17 -
Linux Linux 4.12 -

II. Public POCs for CVE-2026-43069

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III. Intelligence Information for CVE-2026-43069

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Patches & Fixes for CVE-2026-43069 (8)

Same Patch Batch · Linux · 2026-05-05 · 15 CVEs total

CVE-2026-43067 9.8 CRITICAL ext4: handle wraparound when searching for blocks for indirect mapped blocks
CVE-2026-43071 9.1 CRITICAL dcache: Limit the minimal number of bucket to two
CVE-2026-43070 7.8 HIGH bpf: Reset register ID for BPF_END value tracking
CVE-2026-43063 7.8 HIGH xfs: don't irele after failing to iget in xfs_attri_recover_work
CVE-2026-43060 7.8 HIGH netfilter: nft_ct: drop pending enqueued packets on removal
CVE-2026-43062 7.1 HIGH Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()
CVE-2026-43073 x86-64: rename misleadingly named '__copy_user_nocache()' function
CVE-2026-43072 drm/vc4: platform_get_irq_byname() returns an int
CVE-2026-43068 ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()
CVE-2026-43066 ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths
CVE-2026-43065 ext4: always drain queued discard work in ext4_mb_release()
CVE-2026-43064 dmaengine: idxd: Fix not releasing workqueue on .release()
CVE-2026-43061 serial: 8250: Fix TX deadlock when using DMA
CVE-2026-43059 Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43069

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