{"dataType":"CVE_RECORD","dataVersion":"5.1","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":"2025-05-04T08:42:05.577Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T08:42:05.577Z"},"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"}],"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"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.9.324"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.14.289"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.19.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.4.207"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.132"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.18.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.19"}]}]}],"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-1.2.0"}},"adp":[{"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"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-02-27T18:22:31.594Z"}}]}}