CVE-2026-43059

HIGHNVD 7.8

7.8

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:

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.

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.

CVSS v3: 7.8
EG Score: 0.0(none)
EPSS: 2.5%
KEV: Not listed

Published

May 5, 2026

Last Modified

May 22, 2026

References (4)

416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/02023ff760cc104a5d86a82ef5b8dd89098ad78d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17f89341cb4281d1da0e2fb0de5406ab7c4e25ef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/695b45b2262fcb5e71bed1175aad59c72f92aa78
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b5c5e96f3b0a5003c3ff98ebb33e59afec51dd77

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-416Use After Free

Data Freshness Timeline

(refreshed 12× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 14:27 UTCEG score recompute
2026-05-20 14:27 UTCGHSA enrichment
2026-05-20 11:22 UTCepss_batch
2026-05-20 11:22 UTCepss_batch

Frequently asked(5)

What is CVE-2026-43059?

CVE-2026-43059 is a high vulnerability published on May 5, 2026. 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 mgmtpendingvalid(), which not only validates the pending command but also unlinks it…

When was CVE-2026-43059 disclosed?

CVE-2026-43059 was first published in the National Vulnerability Database on May 5, 2026, with the most recent update on May 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-43059 actively exploited?

CVE-2026-43059 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-43059?

CVE-2026-43059 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 0.0.

How do I remediate CVE-2026-43059?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43059, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-43059

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

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Published

Last Modified

References (4)

Frequently asked(5)

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