mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
synced 2025-05-29 01:31:20 +00:00
88 lines
6.7 KiB
JSON
88 lines
6.7 KiB
JSON
{
|
|
"id": "CVE-2022-49626",
|
|
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"published": "2025-02-26T07:01:37.937",
|
|
"lastModified": "2025-02-27T19:15:45.850",
|
|
"vulnStatus": "Awaiting Analysis",
|
|
"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->pci_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't detect it every time):\n$ echo 1 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n$ echo 0 > /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->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 > /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 "
|
|
}
|
|
],
|
|
"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"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/3199e34912d84cdfb8a93a984c5ae5c73fb13e84",
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/58d93e9d160c0de6d867c7eb4c2206671a351eb1",
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/9c854ae512b89229aeee93849e9bd4c115b37909",
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/bcad880865bfb421885364b1f0c7351280fe2b97",
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c2240500817b3b4b996cdf2a461a3a5679f49b94",
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c9e75bb22a26e391f189f5a5133dd63dcb57fdaa",
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/e435c4aeeaa073091f7f3b7735af2ef5c97d63f2",
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/ebe41da5d47ac0fff877e57bd14c54dccf168827",
|
|
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
|
|
}
|
|
]
|
|
} |