{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-08T00:55:23.788","vulnerabilities":[{"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->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 leyó después de ser liberado fue vf->pci_dev: se liberó de pci_disable_sriov y luego se leyó 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 liberación para no intentar leerlo más 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"}]}],"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"]}]}}]}