CVE-2022-49626 (GCVE-0-2022-49626)
Vulnerability from cvelistv5
Published
2025-02-26 02:23
Modified
2025-05-04 08:42
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: sfc: fix use after free when disabling sriov Use after free is detected by kfence when disabling sriov. What was read after being freed was vf->pci_dev: it was freed from pci_disable_sriov and later read in efx_ef10_sriov_free_vf_vports, called from efx_ef10_sriov_free_vf_vswitching. Set the pointer to NULL at release time to not trying to read it later. Reproducer and dmesg log (note that kfence doesn't detect it every time): $ echo 1 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs $ echo 0 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc] Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224): efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc] efx_ef10_pci_sriov_disable+0x38/0x70 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xfe/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k allocated by task 6771 on cpu 10 at 3137.860196s: pci_alloc_dev+0x21/0x60 pci_iov_add_virtfn+0x2a2/0x320 sriov_enable+0x212/0x3e0 efx_ef10_sriov_configure+0x67/0x80 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xba/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae freed by task 6771 on cpu 12 at 3170.991309s: device_release+0x34/0x90 kobject_cleanup+0x3a/0x130 pci_iov_remove_virtfn+0xd9/0x120 sriov_disable+0x30/0xe0 efx_ef10_pci_sriov_disable+0x57/0x70 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xfe/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3199e34912d84cdfb8a93a984c5ae5c73fb13e84Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/58d93e9d160c0de6d867c7eb4c2206671a351eb1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9c854ae512b89229aeee93849e9bd4c115b37909Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bcad880865bfb421885364b1f0c7351280fe2b97Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2240500817b3b4b996cdf2a461a3a5679f49b94Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c9e75bb22a26e391f189f5a5133dd63dcb57fdaaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e435c4aeeaa073091f7f3b7735af2ef5c97d63f2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebe41da5d47ac0fff877e57bd14c54dccf168827Patch
Impacted products
Vendor Product Version
Linux Linux Version: 3c5eb87605e85146a78de589b5070a37862425db
Version: 3c5eb87605e85146a78de589b5070a37862425db
Version: 3c5eb87605e85146a78de589b5070a37862425db
Version: 3c5eb87605e85146a78de589b5070a37862425db
Version: 3c5eb87605e85146a78de589b5070a37862425db
Version: 3c5eb87605e85146a78de589b5070a37862425db
Version: 3c5eb87605e85146a78de589b5070a37862425db
Version: 3c5eb87605e85146a78de589b5070a37862425db
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              "confidentialityImpact": "HIGH",
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              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsfc: fix use after free when disabling sriov\n\nUse after free is detected by kfence when disabling sriov. What was read\nafter being freed was vf-\u003epci_dev: it was freed from pci_disable_sriov\nand later read in efx_ef10_sriov_free_vf_vports, called from\nefx_ef10_sriov_free_vf_vswitching.\n\nSet the pointer to NULL at release time to not trying to read it later.\n\nReproducer and dmesg log (note that kfence doesn\u0027t detect it every time):\n$ echo 1 \u003e /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n$ echo 0 \u003e /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n\n BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\n\n Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224):\n  efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\n  efx_ef10_pci_sriov_disable+0x38/0x70 [sfc]\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\n  sriov_numvfs_store+0xfe/0x140\n  kernfs_fop_write_iter+0x11c/0x1b0\n  new_sync_write+0x11f/0x1b0\n  vfs_write+0x1eb/0x280\n  ksys_write+0x5f/0xe0\n  do_syscall_64+0x5c/0x80\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k\n\n allocated by task 6771 on cpu 10 at 3137.860196s:\n  pci_alloc_dev+0x21/0x60\n  pci_iov_add_virtfn+0x2a2/0x320\n  sriov_enable+0x212/0x3e0\n  efx_ef10_sriov_configure+0x67/0x80 [sfc]\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\n  sriov_numvfs_store+0xba/0x140\n  kernfs_fop_write_iter+0x11c/0x1b0\n  new_sync_write+0x11f/0x1b0\n  vfs_write+0x1eb/0x280\n  ksys_write+0x5f/0xe0\n  do_syscall_64+0x5c/0x80\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n freed by task 6771 on cpu 12 at 3170.991309s:\n  device_release+0x34/0x90\n  kobject_cleanup+0x3a/0x130\n  pci_iov_remove_virtfn+0xd9/0x120\n  sriov_disable+0x30/0xe0\n  efx_ef10_pci_sriov_disable+0x57/0x70 [sfc]\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\n  sriov_numvfs_store+0xfe/0x140\n  kernfs_fop_write_iter+0x11c/0x1b0\n  new_sync_write+0x11f/0x1b0\n  vfs_write+0x1eb/0x280\n  ksys_write+0x5f/0xe0\n  do_syscall_64+0x5c/0x80\n  entry_SYSCALL_64_after_hwframe+0x44/0xae"
        }
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      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:42:05.577Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3199e34912d84cdfb8a93a984c5ae5c73fb13e84"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9e75bb22a26e391f189f5a5133dd63dcb57fdaa"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c854ae512b89229aeee93849e9bd4c115b37909"
        },
        {
          "url": "https://git.kernel.org/stable/c/bcad880865bfb421885364b1f0c7351280fe2b97"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2240500817b3b4b996cdf2a461a3a5679f49b94"
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        },
        {
          "url": "https://git.kernel.org/stable/c/ebe41da5d47ac0fff877e57bd14c54dccf168827"
        }
      ],
      "title": "sfc: fix use after free when disabling sriov",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49626",
    "datePublished": "2025-02-26T02:23:41.274Z",
    "dateReserved": "2025-02-26T02:21:30.421Z",
    "dateUpdated": "2025-05-04T08:42:05.577Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49626\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:37.937\",\"lastModified\":\"2025-03-24T19:49:38.357\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsfc: fix use after free when disabling sriov\\n\\nUse after free is detected by kfence when disabling sriov. What was read\\nafter being freed was vf-\u003epci_dev: it was freed from pci_disable_sriov\\nand later read in efx_ef10_sriov_free_vf_vports, called from\\nefx_ef10_sriov_free_vf_vswitching.\\n\\nSet the pointer to NULL at release time to not trying to read it later.\\n\\nReproducer and dmesg log (note that kfence doesn\u0027t detect it every time):\\n$ echo 1 \u003e /sys/class/net/enp65s0f0np0/device/sriov_numvfs\\n$ echo 0 \u003e /sys/class/net/enp65s0f0np0/device/sriov_numvfs\\n\\n BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\\n\\n Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224):\\n  efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\\n  efx_ef10_pci_sriov_disable+0x38/0x70 [sfc]\\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\\n  sriov_numvfs_store+0xfe/0x140\\n  kernfs_fop_write_iter+0x11c/0x1b0\\n  new_sync_write+0x11f/0x1b0\\n  vfs_write+0x1eb/0x280\\n  ksys_write+0x5f/0xe0\\n  do_syscall_64+0x5c/0x80\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\n kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k\\n\\n allocated by task 6771 on cpu 10 at 3137.860196s:\\n  pci_alloc_dev+0x21/0x60\\n  pci_iov_add_virtfn+0x2a2/0x320\\n  sriov_enable+0x212/0x3e0\\n  efx_ef10_sriov_configure+0x67/0x80 [sfc]\\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\\n  sriov_numvfs_store+0xba/0x140\\n  kernfs_fop_write_iter+0x11c/0x1b0\\n  new_sync_write+0x11f/0x1b0\\n  vfs_write+0x1eb/0x280\\n  ksys_write+0x5f/0xe0\\n  do_syscall_64+0x5c/0x80\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\n freed by task 6771 on cpu 12 at 3170.991309s:\\n  device_release+0x34/0x90\\n  kobject_cleanup+0x3a/0x130\\n  pci_iov_remove_virtfn+0xd9/0x120\\n  sriov_disable+0x30/0xe0\\n  efx_ef10_pci_sriov_disable+0x57/0x70 [sfc]\\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\\n  sriov_numvfs_store+0xfe/0x140\\n  kernfs_fop_write_iter+0x11c/0x1b0\\n  new_sync_write+0x11f/0x1b0\\n  vfs_write+0x1eb/0x280\\n  ksys_write+0x5f/0xe0\\n  do_syscall_64+0x5c/0x80\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sfc: se corrige el use-after-free al deshabilitar sriov. El use-after-free es detectado por kfence al deshabilitar sriov. Lo que se ley\u00f3 despu\u00e9s de ser liberado fue vf-\u0026gt;pci_dev: se liber\u00f3 de pci_disable_sriov y luego se ley\u00f3 en efx_ef10_sriov_free_vf_vports, llamado desde efx_ef10_sriov_free_vf_vswitching. Establezca el puntero en NULL en el momento de la liberaci\u00f3n para no intentar leerlo m\u00e1s tarde. Registro del reproductor y dmesg (tenga en cuenta que kfence no lo detecta cada vez): $ echo 1 \u0026gt; /sys/class/net/enp65s0f0np0/device/sriov_numvfs $ echo 0 \u0026gt; /sys/class/net/enp65s0f0np0/device/sriov_numvfs BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc] Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224): efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc] efx_ef10_pci_sriov_disable+0x38/0x70 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xfe/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k allocated by task 6771 on cpu 10 at 3137.860196s: pci_alloc_dev+0x21/0x60 pci_iov_add_virtfn+0x2a2/0x320 sriov_enable+0x212/0x3e0 efx_ef10_sriov_configure+0x67/0x80 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xba/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae freed by task 6771 on cpu 12 at 3170.991309s: device_release+0x34/0x90 kobject_cleanup+0x3a/0x130 pci_iov_remove_virtfn+0xd9/0x120 sriov_disable+0x30/0xe0 efx_ef10_pci_sriov_disable+0x57/0x70 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xfe/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae \"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.2\",\"versionEndExcluding\":\"4.9.324\",\"matchCriteriaId\":\"2423841B-6626-4BBC-967E-B6216D5DB225\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.289\",\"matchCriteriaId\":\"9209AEEF-782D-43E6-AA5C-9F5B9CD6ED11\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.253\",\"matchCriteriaId\":\"2B22ACD7-9025-4AD5-AD6E-A929DEC79B75\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.207\",\"matchCriteriaId\":\"C27A52F3-82C8-4F03-BE80-38D11CDBD503\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.132\",\"matchCriteriaId\":\"46CE9FE9-22E3-45CA-8B5F-190C2CAFC5CE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.56\",\"matchCriteriaId\":\"AF59CE2F-BA66-4BFD-83AB-4576F3D1B49A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.18.13\",\"matchCriteriaId\":\"640221A7-96EE-4B48-8FE1-BA810131789B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"A8C30C2D-F82D-4D37-AB48-D76ABFBD5377\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"BF8547FC-C849-4F1B-804B-A93AE2F04A92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F3068028-F453-4A1C-B80F-3F5609ACEF60\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"2E9C0DB0-D349-489F-A3D6-B77214E93A8A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"1A0DE3B7-0FFB-45AA-9BD6-19870CA7C6FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"00AE778B-BAEE-49EB-9F84-003B73D7862A\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3199e34912d84cdfb8a93a984c5ae5c73fb13e84\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/58d93e9d160c0de6d867c7eb4c2206671a351eb1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9c854ae512b89229aeee93849e9bd4c115b37909\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bcad880865bfb421885364b1f0c7351280fe2b97\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c2240500817b3b4b996cdf2a461a3a5679f49b94\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c9e75bb22a26e391f189f5a5133dd63dcb57fdaa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e435c4aeeaa073091f7f3b7735af2ef5c97d63f2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ebe41da5d47ac0fff877e57bd14c54dccf168827\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-02-26T02:23:41.274Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsfc: fix use after free when disabling sriov\\n\\nUse after free is detected by kfence when disabling sriov. What was read\\nafter being freed was vf-\u003epci_dev: it was freed from pci_disable_sriov\\nand later read in efx_ef10_sriov_free_vf_vports, called from\\nefx_ef10_sriov_free_vf_vswitching.\\n\\nSet the pointer to NULL at release time to not trying to read it later.\\n\\nReproducer and dmesg log (note that kfence doesn\u0027t detect it every time):\\n$ echo 1 \u003e /sys/class/net/enp65s0f0np0/device/sriov_numvfs\\n$ echo 0 \u003e /sys/class/net/enp65s0f0np0/device/sriov_numvfs\\n\\n BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\\n\\n Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224):\\n  efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\\n  efx_ef10_pci_sriov_disable+0x38/0x70 [sfc]\\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\\n  sriov_numvfs_store+0xfe/0x140\\n  kernfs_fop_write_iter+0x11c/0x1b0\\n  new_sync_write+0x11f/0x1b0\\n  vfs_write+0x1eb/0x280\\n  ksys_write+0x5f/0xe0\\n  do_syscall_64+0x5c/0x80\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\n kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k\\n\\n allocated by task 6771 on cpu 10 at 3137.860196s:\\n  pci_alloc_dev+0x21/0x60\\n  pci_iov_add_virtfn+0x2a2/0x320\\n  sriov_enable+0x212/0x3e0\\n  efx_ef10_sriov_configure+0x67/0x80 [sfc]\\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\\n  sriov_numvfs_store+0xba/0x140\\n  kernfs_fop_write_iter+0x11c/0x1b0\\n  new_sync_write+0x11f/0x1b0\\n  vfs_write+0x1eb/0x280\\n  ksys_write+0x5f/0xe0\\n  do_syscall_64+0x5c/0x80\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\n freed by task 6771 on cpu 12 at 3170.991309s:\\n  device_release+0x34/0x90\\n  kobject_cleanup+0x3a/0x130\\n  pci_iov_remove_virtfn+0xd9/0x120\\n  sriov_disable+0x30/0xe0\\n  efx_ef10_pci_sriov_disable+0x57/0x70 [sfc]\\n  efx_pci_sriov_configure+0x24/0x40 [sfc]\\n  sriov_numvfs_store+0xfe/0x140\\n  kernfs_fop_write_iter+0x11c/0x1b0\\n  new_sync_write+0x11f/0x1b0\\n  vfs_write+0x1eb/0x280\\n  ksys_write+0x5f/0xe0\\n  do_syscall_64+0x5c/0x80\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\"}], \"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_sriov.c\"], \"versions\": [{\"version\": \"3c5eb87605e85146a78de589b5070a37862425db\", \"lessThan\": \"3199e34912d84cdfb8a93a984c5ae5c73fb13e84\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"3c5eb87605e85146a78de589b5070a37862425db\", \"lessThan\": \"c9e75bb22a26e391f189f5a5133dd63dcb57fdaa\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"3c5eb87605e85146a78de589b5070a37862425db\", \"lessThan\": \"9c854ae512b89229aeee93849e9bd4c115b37909\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"3c5eb87605e85146a78de589b5070a37862425db\", \"lessThan\": \"bcad880865bfb421885364b1f0c7351280fe2b97\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"3c5eb87605e85146a78de589b5070a37862425db\", \"lessThan\": \"c2240500817b3b4b996cdf2a461a3a5679f49b94\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"3c5eb87605e85146a78de589b5070a37862425db\", \"lessThan\": \"58d93e9d160c0de6d867c7eb4c2206671a351eb1\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"3c5eb87605e85146a78de589b5070a37862425db\", \"lessThan\": \"e435c4aeeaa073091f7f3b7735af2ef5c97d63f2\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"3c5eb87605e85146a78de589b5070a37862425db\", \"lessThan\": \"ebe41da5d47ac0fff877e57bd14c54dccf168827\", \"status\": \"affected\", \"versionType\": \"git\"}]}, {\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"affected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"drivers/net/ethernet/sfc/ef10_sriov.c\"], \"versions\": [{\"version\": \"4.2\", \"status\": \"affected\"}, {\"version\": \"0\", \"lessThan\": \"4.2\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"4.9.324\", \"lessThanOrEqual\": \"4.9.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"4.14.289\", \"lessThanOrEqual\": \"4.14.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"4.19.253\", \"lessThanOrEqual\": \"4.19.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"5.4.207\", \"lessThanOrEqual\": \"5.4.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"5.10.132\", \"lessThanOrEqual\": \"5.10.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"5.15.56\", \"lessThanOrEqual\": \"5.15.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"5.18.13\", \"lessThanOrEqual\": \"5.18.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"5.19\", \"lessThanOrEqual\": \"*\", \"status\": \"unaffected\", \"versionType\": \"original_commit_for_fix\"}]}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3199e34912d84cdfb8a93a984c5ae5c73fb13e84\"}, {\"url\": \"https://git.kernel.org/stable/c/c9e75bb22a26e391f189f5a5133dd63dcb57fdaa\"}, {\"url\": \"https://git.kernel.org/stable/c/9c854ae512b89229aeee93849e9bd4c115b37909\"}, {\"url\": \"https://git.kernel.org/stable/c/bcad880865bfb421885364b1f0c7351280fe2b97\"}, {\"url\": \"https://git.kernel.org/stable/c/c2240500817b3b4b996cdf2a461a3a5679f49b94\"}, {\"url\": \"https://git.kernel.org/stable/c/58d93e9d160c0de6d867c7eb4c2206671a351eb1\"}, {\"url\": \"https://git.kernel.org/stable/c/e435c4aeeaa073091f7f3b7735af2ef5c97d63f2\"}, {\"url\": \"https://git.kernel.org/stable/c/ebe41da5d47ac0fff877e57bd14c54dccf168827\"}], \"title\": \"sfc: fix use after free when disabling sriov\", \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-49626\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-27T18:15:26.254621Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-27T18:15:27.581Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49626\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2025-02-26T02:21:30.421Z\", \"datePublished\": \"2025-02-26T02:23:41.274Z\", \"dateUpdated\": \"2025-02-27T18:22:31.594Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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