CVE-2022-49625

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Otherwise, we\nhit this line in vunmap, causing the crash:\n BUG_ON(in_interrupt());\n\nThis patch reenables BH to release the buffer.\n\nLog messages when the bug is hit:\n kernel BUG at mm/vmalloc.c:2727!\n invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 6 PID: 1462 Comm: NetworkManager Kdump: loaded Tainted: G I --------- --- 5.14.0-119.el9.x86_64 #1\n Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020\n RIP: 0010:vunmap+0x2e/0x30\n ...skip...\n Call Trace:\n __iommu_dma_free+0x96/0x100\n efx_nic_free_buffer+0x2b/0x40 [sfc]\n efx_ef10_try_update_nic_stats_vf+0x14a/0x1c0 [sfc]\n efx_ef10_update_stats_vf+0x18/0x40 [sfc]\n efx_start_all+0x15e/0x1d0 [sfc]\n efx_net_open+0x5a/0xe0 [sfc]\n __dev_open+0xe7/0x1a0\n __dev_change_flags+0x1d7/0x240\n dev_change_flags+0x21/0x60\n ...skip..."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/sfc/ef10.c"], "versions": [{"version": "d778819609a27efd5358da8151a0ad3507243e19", "lessThan": "d9840212a9c00507347c703f4fdeda16400407e0", "status": "affected", "versionType": "git"}, {"version": "d778819609a27efd5358da8151a0ad3507243e19", "lessThan": "b9072305270579a9d6afc9b926166231e5b1a7c8", "status": "affected", "versionType": "git"}, {"version": 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{}

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It is\ndisallowed to do that in IRQ context or with BH disabled. Otherwise, we\nhit this line in vunmap, causing the crash:\n BUG_ON(in_interrupt());\n\nThis patch reenables BH to release the buffer.\n\nLog messages when the bug is hit:\n kernel BUG at mm/vmalloc.c:2727!\n invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 6 PID: 1462 Comm: NetworkManager Kdump: loaded Tainted: G I --------- --- 5.14.0-119.el9.x86_64 #1\n Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020\n RIP: 0010:vunmap+0x2e/0x30\n ...skip...\n Call Trace:\n __iommu_dma_free+0x96/0x100\n efx_nic_free_buffer+0x2b/0x40 [sfc]\n efx_ef10_try_update_nic_stats_vf+0x14a/0x1c0 [sfc]\n efx_ef10_update_stats_vf+0x18/0x40 [sfc]\n efx_start_all+0x15e/0x1d0 [sfc]\n efx_net_open+0x5a/0xe0 [sfc]\n __dev_open+0xe7/0x1a0\n __dev_change_flags+0x1d7/0x240\n dev_change_flags+0x21/0x60\n ...skip..."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sfc: corregir p\u00e1nico del kernel al crear VF Al crear VF, puede ocurrir un p\u00e1nico del kernel al llamar a efx_ef10_try_update_nic_stats_vf. Al liberar un b\u00fafer coherente DMA, a veces, no s\u00e9 en qu\u00e9 circunstancias espec\u00edficas, tiene que desasignar la memoria con vunmap. No est\u00e1 permitido hacer eso en el contexto de IRQ o con BH deshabilitado. De lo contrario, llegamos a esta l\u00ednea en vunmap, lo que provoca el bloqueo: BUG_ON(in_interrupt()); Este parche vuelve a habilitar BH para liberar el b\u00fafer. Mensajes de registro cuando se detecta el error: kernel BUG en mm/vmalloc.c:2727! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 6 PID: 1462 Comm: NetworkManager Kdump: loaded Tainted: G I --------- --- 5.14.0-119.el9.x86_64 #1 Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020 RIP: 0010:vunmap+0x2e/0x30 ...skip... Call Trace: __iommu_dma_free+0x96/0x100 efx_nic_free_buffer+0x2b/0x40 [sfc] efx_ef10_try_update_nic_stats_vf+0x14a/0x1c0 [sfc] efx_ef10_update_stats_vf+0x18/0x40 [sfc] efx_start_all+0x15e/0x1d0 [sfc] efx_net_open+0x5a/0xe0 [sfc] __dev_open+0xe7/0x1a0 __dev_change_flags+0x1d7/0x240 dev_change_flags+0x21/0x60 ...skip... "}], "id": "CVE-2022-49625", "lastModified": "2026-06-17T05:18:39.893", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-26T07:01:37.847", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2022:7683", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-425.3.1.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-11-08T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}], "bugzilla": {"description": "kernel: sfc: fix kernel panic when creating VF", "id": "2348265", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348265"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsfc: fix kernel panic when creating VF\nWhen creating VFs a kernel panic can happen when calling to\nefx_ef10_try_update_nic_stats_vf.\nWhen releasing a DMA coherent buffer, sometimes, I don't know in what\nspecific circumstances, it has to unmap memory with vunmap. It is\ndisallowed to do that in IRQ context or with BH disabled. Otherwise, we\nhit this line in vunmap, causing the crash:\nBUG_ON(in_interrupt());\nThis patch reenables BH to release the buffer.\nLog messages when the bug is hit:\nkernel BUG at mm/vmalloc.c:2727!\ninvalid opcode: 0000 [#1] PREEMPT SMP NOPTI\nCPU: 6 PID: 1462 Comm: NetworkManager Kdump: loaded Tainted: G I --------- --- 5.14.0-119.el9.x86_64 #1\nHardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020\nRIP: 0010:vunmap+0x2e/0x30\n...skip...\nCall Trace:\n__iommu_dma_free+0x96/0x100\nefx_nic_free_buffer+0x2b/0x40 [sfc]\nefx_ef10_try_update_nic_stats_vf+0x14a/0x1c0 [sfc]\nefx_ef10_update_stats_vf+0x18/0x40 [sfc]\nefx_start_all+0x15e/0x1d0 [sfc]\nefx_net_open+0x5a/0xe0 [sfc]\n__dev_open+0xe7/0x1a0\n__dev_change_flags+0x1d7/0x240\ndev_change_flags+0x21/0x60\n...skip..."], "name": "CVE-2022-49625", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49625\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49625\nhttps://lore.kernel.org/linux-cve-announce/2025022616-CVE-2022-49625-2fa2@gregkh/T"], "threat_severity": "Low"}

{}