CVE-2022-49452

{"id": "CVE-2022-49452", "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": "2025-02-26T07:01:21.587", "references": [{"url": "https://git.kernel.org/stable/c/06d129946a71f3159b3b40ee95549183edf2c79d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ba5fe3dd4833bbc03609c5c0c2dd2cea5fa5addf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-eth: retrieve the virtual address before dma_unmap\n\nThe TSO header was DMA unmapped before the virtual address was retrieved\nand then used to free the buffer. This meant that we were actually\nremoving the DMA map and then trying to search for it to help in\nretrieving the virtual address. This lead to a invalid virtual address\nbeing used in the kfree call.\n\nFix this by calling dpaa2_iova_to_virt() prior to the dma_unmap call.\n\n[ 487.231819] Unable to handle kernel paging request at virtual address fffffd9807000008\n\n(...)\n\n[ 487.354061] Hardware name: SolidRun LX2160A Honeycomb (DT)\n[ 487.359535] pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 487.366485] pc : kfree+0xac/0x304\n[ 487.369799] lr : kfree+0x204/0x304\n[ 487.373191] sp : ffff80000c4eb120\n[ 487.376493] x29: ffff80000c4eb120 x28: ffff662240c46400 x27: 0000000000000001\n[ 487.383621] x26: 0000000000000001 x25: ffff662246da0cc0 x24: ffff66224af78000\n[ 487.390748] x23: ffffad184f4ce008 x22: ffffad1850185000 x21: ffffad1838d13cec\n[ 487.397874] x20: ffff6601c0000000 x19: fffffd9807000000 x18: 0000000000000000\n[ 487.405000] x17: ffffb910cdc49000 x16: ffffad184d7d9080 x15: 0000000000004000\n[ 487.412126] x14: 0000000000000008 x13: 000000000000ffff x12: 0000000000000000\n[ 487.419252] x11: 0000000000000004 x10: 0000000000000001 x9 : ffffad184d7d927c\n[ 487.426379] x8 : 0000000000000000 x7 : 0000000ffffffd1d x6 : ffff662240a94900\n[ 487.433505] x5 : 0000000000000003 x4 : 0000000000000009 x3 : ffffad184f4ce008\n[ 487.440632] x2 : ffff662243eec000 x1 : 0000000100000100 x0 : fffffc0000000000\n[ 487.447758] Call trace:\n[ 487.450194] kfree+0xac/0x304\n[ 487.453151] dpaa2_eth_free_tx_fd.isra.0+0x33c/0x3e0 [fsl_dpaa2_eth]\n[ 487.459507] dpaa2_eth_tx_conf+0x100/0x2e0 [fsl_dpaa2_eth]\n[ 487.464989] dpaa2_eth_poll+0xdc/0x380 [fsl_dpaa2_eth]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dpaa2-eth: recuperar la direcci\u00f3n virtual antes de dma_unmap El encabezado TSO fue desasignado por DMA antes de que se recuperara la direcci\u00f3n virtual y luego se usara para liberar el b\u00fafer. Esto significaba que en realidad est\u00e1bamos eliminando el mapa DMA y luego tratando de buscarlo para ayudar a recuperar la direcci\u00f3n virtual. Esto llev\u00f3 a que se usara una direcci\u00f3n virtual no v\u00e1lida en la llamada kfree. Solucione esto llamando a dpaa2_iova_to_virt() antes de la llamada dma_unmap. [ 487.231819] No se puede gestionar la solicitud de paginaci\u00f3n del n\u00facleo en la direcci\u00f3n virtual fffffd9807000008 (...) [ 487.354061] Hardware name: SolidRun LX2160A Honeycomb (DT) [ 487.359535] pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 487.366485] pc : kfree+0xac/0x304 [ 487.369799] lr : kfree+0x204/0x304 [ 487.373191] sp : ffff80000c4eb120 [ 487.376493] x29: ffff80000c4eb120 x28: ffff662240c46400 x27: 0000000000000001 [ 487.383621] x26: 0000000000000001 x25: ffff662246da0cc0 x24: ffff66224af78000 [ 487.390748] x23: ffffad184f4ce008 x22: ffffad1850185000 x21: ffffad1838d13cec [ 487.397874] x20: ffff6601c0000000 x19: fffffd9807000000 x18: 0000000000000000 [ 487.405000] x17: ffffb910cdc49000 x16: ffffad184d7d9080 x15: 0000000000004000 [ 487.412126] x14: 0000000000000008 x13: 000000000000ffff x12: 0000000000000000 [ 487.419252] x11: 0000000000000004 x10: 0000000000000001 x9 : ffffad184d7d927c [ 487.426379] x8 : 0000000000000000 x7 : 0000000ffffffd1d x6 : ffff662240a94900 [ 487.433505] x5 : 0000000000000003 x4 : 0000000000000009 x3 : ffffad184f4ce008 [ 487.440632] x2 : ffff662243eec000 x1 : 0000000100000100 x0 : fffffc0000000000 [ 487.447758] Call trace: [ 487.450194] kfree+0xac/0x304 [ 487.453151] dpaa2_eth_free_tx_fd.isra.0+0x33c/0x3e0 [fsl_dpaa2_eth] [ 487.459507] dpaa2_eth_tx_conf+0x100/0x2e0 [fsl_dpaa2_eth] [ 487.464989] dpaa2_eth_poll+0xdc/0x380 [fsl_dpaa2_eth] "}], "lastModified": "2025-10-22T17:25:08.010", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2", "versionEndExcluding": "5.18.3", "versionStartIncluding": "5.18"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}