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CVE-2026-43059— Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers

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MGMT命令完成处理函数中列表操作不当，可能导致列表损坏和释放后重用。

AI Predicted 5.5 Difficulty: Hard EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 15

VendorProduct Version RangeStatus
Linux Linux d71b98f253b079cbadc83266383f26fe7e9e103b< 695b45b2262fcb5e71bed1175aad59c72f92aa78 affected
302a1f674c00dd5581ab8e493ef44767c5101aab< b5c5e96f3b0a5003c3ff98ebb33e59afec51dd77 affected
302a1f674c00dd5581ab8e493ef44767c5101aab< 02023ff760cc104a5d86a82ef5b8dd89098ad78d affected
302a1f674c00dd5581ab8e493ef44767c5101aab< 17f89341cb4281d1da0e2fb0de5406ab7c4e25ef affected
0b60eb04b8524e1b4b3f07fea0d16fda9a677d9a affected
87a1f16f07c6c43771754075e08f45b41d237421 affected
6.12.59< 6.12.78 affected
6.6.140< 6.7 affected
… +7 more rows
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I. Basic Information for CVE-2026-43059

Vulnerability Information
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Vulnerability Title
Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers Commit 302a1f674c00 ("Bluetooth: MGMT: Fix possible UAFs") introduced mgmt_pending_valid(), which not only validates the pending command but also unlinks it from the pending list if it is valid. This change in semantics requires updates to several completion handlers to avoid list corruption and memory safety issues. This patch addresses two left-over issues from the aforementioned rework: 1. In mgmt_add_adv_patterns_monitor_complete(), mgmt_pending_remove() is replaced with mgmt_pending_free() in the success path. Since mgmt_pending_valid() already unlinks the command at the beginning of the function, calling mgmt_pending_remove() leads to a double list_del() and subsequent list corruption/kernel panic. 2. In set_mesh_complete(), the use of mgmt_pending_foreach() in the error path is removed. Since the current command is already unlinked by mgmt_pending_valid(), this foreach loop would incorrectly target other pending mesh commands, potentially freeing them while they are still being processed concurrently (leading to UAFs). The redundant mgmt_cmd_status() is also simplified to use cmd->opcode directly.
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MGMT命令完成处理函数中列表操作不当，可能导致列表损坏和释放后重用。
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 d71b98f253b079cbadc83266383f26fe7e9e103b ~ 695b45b2262fcb5e71bed1175aad59c72f92aa78 -
Linux Linux 6.17 -

II. Public POCs for CVE-2026-43059

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III. Intelligence Information for CVE-2026-43059

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Patches & Fixes for CVE-2026-43059 (4)

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43059

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