CVE-2022-49112

{"id": "CVE-2022-49112", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-02-26T07:00:48.577", "references": [{"url": "https://git.kernel.org/stable/c/123bc712b1de0805f9d683687e17b1ec2aba0b68", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/13946d5a68efd11dd6af2f6ef4c908f6b00158a5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/95e2af01669c7a3cb7a933cefa06361f9db15059", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c37b4cab3d97ef64b206fca4d9daabd9aff7356e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: fix monitor mode crash with sdio driver\n\nmt7921s driver may receive frames with fragment buffers. If there is a\nCTS packet received in monitor mode, the payload is 10 bytes only and\nneed 6 bytes header padding after RXD buffer. However, only RXD in the\nfirst linear buffer, if we pull buffer size RXD-size+6 bytes with\nskb_pull(), that would trigger \"BUG_ON(skb->len < skb->data_len)\" in\n__skb_pull().\n\nTo avoid the nonlinear buffer issue, enlarge the RXD size from 128 to\n256 to make sure all MCU operation in linear buffer.\n\n[ 52.007562] kernel BUG at include/linux/skbuff.h:2313!\n[ 52.007578] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP\n[ 52.007987] pc : skb_pull+0x48/0x4c\n[ 52.008015] lr : mt7921_queue_rx_skb+0x494/0x890 [mt7921_common]\n[ 52.008361] Call trace:\n[ 52.008377] skb_pull+0x48/0x4c\n[ 52.008400] mt76s_net_worker+0x134/0x1b0 [mt76_sdio 35339a92c6eb7d4bbcc806a1d22f56365565135c]\n[ 52.008431] __mt76_worker_fn+0xe8/0x170 [mt76 ef716597d11a77150bc07e3fdd68eeb0f9b56917]\n[ 52.008449] kthread+0x148/0x3ac\n[ 52.008466] ret_from_fork+0x10/0x30"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mt76: se corrige el fallo del modo de monitor con el controlador sdio. El controlador mt7921s puede recibir tramas con b\u00faferes de fragmentos. Si se recibe un paquete CTS en el modo de monitor, la carga \u00fatil es de solo 10 bytes y se necesitan 6 bytes de relleno de encabezado despu\u00e9s del b\u00fafer RXD. Sin embargo, solo RXD en el primer b\u00fafer lineal, si extraemos el tama\u00f1o del b\u00fafer RXD-size+6 bytes con skb_pull(), eso activar\u00eda \"BUG_ON(skb-&gt;len &lt; skb-&gt;data_len)\" en __skb_pull(). Para evitar el problema del b\u00fafer no lineal, ampl\u00ede el tama\u00f1o de RXD de 128 a 256 para asegurarse de que todas las operaciones de MCU se realicen en el b\u00fafer lineal. [ 52.007562] \u00a1ERROR del kernel en include/linux/skbuff.h:2313! [ 52.007578] Error interno: Vaya - ERROR: 0 [#1] PREEMPT SMP [ 52.007987] pc : skb_pull+0x48/0x4c [ 52.008015] lr : mt7921_queue_rx_skb+0x494/0x890 [mt7921_common] [ 52.008361] Rastreo de llamadas: [ 52.008377] skb_pull+0x48/0x4c [ 52.008400] mt76s_net_worker+0x134/0x1b0 [mt76_sdio 35339a92c6eb7d4bbcc806a1d22f56365565135c] [ 52.008431] __mt76_worker_fn+0xe8/0x170 [mt76 ef716597d11a77150bc07e3fdd68eeb0f9b56917] [ 52.008449] kthread+0x148/0x3ac [ 52.008466] ret_from_fork+0x10/0x30"}], "lastModified": "2025-10-14T20:00:47.577", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5ED7E49C-8A8C-464E-A693-B954F083C885", "versionEndExcluding": "5.15.34", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ABBBA66E-0244-4621-966B-9790AF1EEB00", "versionEndExcluding": "5.16.20", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AE420AC7-1E59-4398-B84F-71F4B4337762", "versionEndExcluding": "5.17.3", "versionStartIncluding": "5.17"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}