CVE-2026-43471

/* * Conceptual Proof of Concept for CVE-2026-43471 * This snippet demonstrates the missing NULL check. */ #include <linux/kernel.h> // Mock structures for illustration struct ufs_hw_queue { int id; }; struct ufs_hw_queue *ufshcd_mcq_req_to_hwq(struct request *req) { // In certain error states, this might return NULL return NULL; } void vulnerable_function(struct request *req) { struct ufs_hw_queue *hwq; hwq = ufshcd_mcq_req_to_hwq(req); // VULNERABILITY: Missing NULL check on hwq before accessing hwq->id // This will cause a kernel panic (NULL pointer dereference) printk(KERN_INFO "Hardware Queue ID: %d\n", hwq->id); } // Fix: // if (!hwq) // return;

{"cve": {"id": "CVE-2026-43471", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T15:17:00.193", "lastModified": "2026-05-20T18:25:59.750", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: core: Fix possible NULL pointer dereference in ufshcd_add_command_trace()\n\nThe kernel log indicates a crash in ufshcd_add_command_trace, due to a NULL\npointer dereference when accessing hwq->id. This can happen if\nufshcd_mcq_req_to_hwq() returns NULL.\n\nThis patch adds a NULL check for hwq before accessing its id field to\nprevent a kernel crash.\n\nKernel log excerpt:\n[<ffffffd5d192dc4c>] notify_die+0x4c/0x8c\n[<ffffffd5d1814e58>] __die+0x60/0xb0\n[<ffffffd5d1814d64>] die+0x4c/0xe0\n[<ffffffd5d181575c>] die_kernel_fault+0x74/0x88\n[<ffffffd5d1864db4>] __do_kernel_fault+0x314/0x318\n[<ffffffd5d2a3cdf8>] do_page_fault+0xa4/0x5f8\n[<ffffffd5d2a3cd34>] do_translation_fault+0x34/0x54\n[<ffffffd5d1864524>] do_mem_abort+0x50/0xa8\n[<ffffffd5d2a297dc>] el1_abort+0x3c/0x64\n[<ffffffd5d2a29718>] el1h_64_sync_handler+0x44/0xcc\n[<ffffffd5d181133c>] el1h_64_sync+0x80/0x88\n[<ffffffd5d255c1dc>] ufshcd_add_command_trace+0x23c/0x320\n[<ffffffd5d255bad8>] ufshcd_compl_one_cqe+0xa4/0x404\n[<ffffffd5d2572968>] ufshcd_mcq_poll_cqe_lock+0xac/0x104\n[<ffffffd5d11c7460>] ufs_mtk_mcq_intr+0x54/0x74 [ufs_mediatek_mod]\n[<ffffffd5d19ab92c>] __handle_irq_event_percpu+0xc8/0x348\n[<ffffffd5d19abca8>] handle_irq_event+0x3c/0xa8\n[<ffffffd5d19b1f0c>] handle_fasteoi_irq+0xf8/0x294\n[<ffffffd5d19aa778>] generic_handle_domain_irq+0x54/0x80\n[<ffffffd5d18102bc>] gic_handle_irq+0x1d4/0x330\n[<ffffffd5d1838210>] call_on_irq_stack+0x44/0x68\n[<ffffffd5d183af30>] do_interrupt_handler+0x78/0xd8\n[<ffffffd5d2a29c00>] el1_interrupt+0x48/0xa8\n[<ffffffd5d2a29ba8>] el1h_64_irq_handler+0x14/0x24\n[<ffffffd5d18113c4>] el1h_64_irq+0x80/0x88\n[<ffffffd5d2527fb4>] arch_local_irq_enable+0x4/0x1c\n[<ffffffd5d25282e4>] cpuidle_enter+0x34/0x54\n[<ffffffd5d195a678>] do_idle+0x1dc/0x2f8\n[<ffffffd5d195a7c4>] cpu_startup_entry+0x30/0x3c\n[<ffffffd5d18155c4>] secondary_start_kernel+0x134/0x1ac\n[<ffffffd5d18640bc>] __secondary_switched+0xc4/0xcc"}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-476"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.41", "versionEndExcluding": "6.6.130", "matchCriteriaId": "26D3BD9B-33D9-4B3C-9FAA-E5BA5D7900AF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9.10", "versionEndExcluding": "6.10", "matchCriteriaId": "9B0E24EE-A06E-497B-BF65-1F0729D0A2C3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.1", "versionEndExcluding": "6.12.78", "matchCriteriaId": "DC42FFE4-BBBB-48E5-AD62-DA7FEAD2DD43"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.19", "matchCriteriaId": "D394AC60-6F28-435F-872A-CCDF384B8331"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.9", "matchCriteriaId": "E825E7C3-FEAC-4FD3-8A81-78D7387948C9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.10:-:*:*:*:*:*:*", "matchCriteriaId": "9EA80796-744E-45F5-8632-2AB4F7889FCD"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0614f5618c24fbc3d555efade22887b102ad7ad6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/30df81f2228d65bddf492db3929d9fcaffd38fc5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/93b9e7ee9e93629db80bbc9dab8a874215b89ccf", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/be730f9ee92ae08f2bc4b336967bcfd8183c06fe", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/f4f590c6c9df7453bbda2ef9170b1b09 ... 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