Vulnerability in Linux kernel (CVE-2026-43471)
Summary
Vulnerability in Linux kernel (CVE-2026-43471). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
scsi: ufs: core: Fix possible NULL pointer dereference in ufshcd_add_command_trace()
The kernel log indicates a crash in ufshcd_add_command_trace, due to a NULL
pointer dereference when accessing hwq->id. This can happen if
ufshcd_mcq_req_to_hwq() returns NULL.
This patch adds a NULL check for hwq before accessing its id field to
prevent a kernel crash.
Kernel log excerpt:
[] notify_die+0x4c/0x8c
[] __die+0x60/0xb0
[] die+0x4c/0xe0
[] die_kernel_fault+0x74/0x88
[] __do_kernel_fault+0x314/0x318
[] do_page_fault+0xa4/0x5f8
[] do_translation_fault+0x34/0x54
[] do_mem_abort+0x50/0xa8
[] el1_abort+0x3c/0x64
[] el1h_64_sync_handler+0x44/0xcc
[] el1h_64_sync+0x80/0x88
[] ufshcd_add_command_trace+0x23c/0x320
[] ufshcd_compl_one_cqe+0xa4/0x404
[] ufshcd_mcq_poll_cqe_lock+0xac/0x104
[] ufs_mtk_mcq_intr+0x54/0x74 [ufs_mediatek_mod]
[] __handle_irq_event_percpu+0xc8/0x348
[] handle_irq_event+0x3c/0xa8
[] handle_fasteoi_irq+0xf8/0x294
[] generic_handle_domain_irq+0x54/0x80
[] gic_handle_irq+0x1d4/0x330
[] call_on_irq_stack+0x44/0x68
[] do_interrupt_handler+0x78/0xd8
[] el1_interrupt+0x48/0xa8
[] el1h_64_irq_handler+0x14/0x24
[] el1h_64_irq+0x80/0x88
[] arch_local_irq_enable+0x4/0x1c
[] cpuidle_enter+0x34/0x54
[] do_idle+0x1dc/0x2f8
[] cpu_startup_entry+0x30/0x3c
[] secondary_start_kernel+0x134/0x1ac
[] __secondary_switched+0xc4/0xcc
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-43471 has been found in Linux kernel.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2026-43471" on the vendor's site.
CVE-2026-43471 (Linux kernel) — CWE-476 / CVSS v3 5.5
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-476) exists in Linux kernel.
Check the vendor advisory for the affected versions of Linux kernel.
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- BellSoft Alpaquita BELL-CVE-2026-43471 linux-lts Fixed in: 6.12.80-r0
- Debian DEBIAN-CVE-2026-43471 linux Fixed in: 6.12.85-1
- Ubuntu UBUNTU-CVE-2026-43471 linux
References
- advisory nvd.nist.gov
- advisory github.com
- package git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web github.com