CVE-2023-52842

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-52842", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T15:19:24.254Z", "datePublished": "2024-05-21T15:31:41.180Z", "dateUpdated": "2026-05-11T19:34:04.686Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:34:04.686Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()\n\nKMSAN reported the following uninit-value access issue:\n\n=====================================================\nBUG: KMSAN: uninit-value in virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421\n virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nUninit was stored to memory at:\n virtio_transport_space_update net/vmw_vsock/virtio_transport_common.c:1274 [inline]\n virtio_transport_recv_pkt+0x1ee8/0x26a0 net/vmw_vsock/virtio_transport_common.c:1415\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nUninit was created at:\n slab_post_alloc_hook+0x105/0xad0 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x5a2/0xaf0 mm/slub.c:3523\n kmalloc_reserve+0x13c/0x4a0 net/core/skbuff.c:559\n __alloc_skb+0x2fd/0x770 net/core/skbuff.c:650\n alloc_skb include/linux/skbuff.h:1286 [inline]\n virtio_vsock_alloc_skb include/linux/virtio_vsock.h:66 [inline]\n virtio_transport_alloc_skb+0x90/0x11e0 net/vmw_vsock/virtio_transport_common.c:58\n virtio_transport_reset_no_sock net/vmw_vsock/virtio_transport_common.c:957 [inline]\n virtio_transport_recv_pkt+0x1279/0x26a0 net/vmw_vsock/virtio_transport_common.c:1387\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nCPU: 1 PID: 10664 Comm: kworker/1:5 Not tainted 6.6.0-rc3-00146-g9f3ebbef746f #3\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc38 04/01/2014\nWorkqueue: vsock-loopback vsock_loopback_work\n=====================================================\n\nThe following simple reproducer can cause the issue described above:\n\nint main(void)\n{\n int sock;\n struct sockaddr_vm addr = {\n .svm_family = AF_VSOCK,\n .svm_cid = VMADDR_CID_ANY,\n .svm_port = 1234,\n };\n\n sock = socket(AF_VSOCK, SOCK_STREAM, 0);\n connect(sock, (struct sockaddr *)&addr, sizeof(addr));\n return 0;\n}\n\nThis issue occurs because the `buf_alloc` and `fwd_cnt` fields of the\n`struct virtio_vsock_hdr` are not initialized when a new skb is allocated\nin `virtio_transport_init_hdr()`. This patch resolves the issue by\ninitializing these fields during allocation."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/vmw_vsock/virtio_transport_common.c"], "versions": [{"version": "baddcc2c71572968cdaeee1c4ab3dc0ad90fa765", "lessThan": "cd12535b97dd7d18cf655ec78ce1cf1f29a576be", "status": "affected", "versionType": "git"}, {"version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20", "lessThan": "0b8906fb48b99e993d6e8a12539f618f4854dd26", "status": "affected", "versionType": "git"}, {"version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20", "lessThan": "34c4effacfc329aeca5635a69fd9e0f6c90b4101", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/vmw_vsock/virtio_transport_common.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.2", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7", "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": "6.3", "versionEndExcluding": "6.6.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cd12535b97dd7d18cf655ec78ce1cf1f29a576be"}, {"url": "https://git.kernel.org/stable/c/0b8906fb48b99e993d6e8a12539f618f4854dd26"}, {"url": "https://git.kernel.org/stable/c/34c4effacfc329aeca5635a69fd9e0f6c90b4101"}], "title": "virtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52842", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-05-21T17:26:02.672939Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:23:39.841Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:11:36.053Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/cd12535b97dd7d18cf655ec78ce1cf1f29a576be", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/0b8906fb48b99e993d6e8a12539f618f4854dd26", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/34c4effacfc329aeca5635a69fd9e0f6c90b4101", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/cd12535b97dd7d18cf655ec78ce1cf1f29a576be", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/0b8906fb48b99e993d6e8a12539f618f4854dd26", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/34c4effacfc329aeca5635a69fd9e0f6c90b4101", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:11:36.053Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52842", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-05-21T17:26:02.672939Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-23T19:01:25.241Z"}, "title": "CISA ADP Vulnrichment"}], "cna": {"title": "virtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "baddcc2c71572968cdaeee1c4ab3dc0ad90fa765", "lessThan": "cd12535b97dd7d18cf655ec78ce1cf1f29a576be", "versionType": "git"}, {"status": "affected", "version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20", "lessThan": "0b8906fb48b99e993d6e8a12539f618f4854dd26", "versionType": "git"}, {"status": "affected", "version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20", "lessThan": "34c4effacfc329aeca5635a69fd9e0f6c90b4101", "versionType": "git"}], "programFiles": ["net/vmw_vsock/virtio_transport_common.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"status": "unaffected", "version": "0", "lessThan": "6.3", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.2", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/vmw_vsock/virtio_transport_common.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/cd12535b97dd7d18cf655ec78ce1cf1f29a576be"}, {"url": "https://git.kernel.org/stable/c/0b8906fb48b99e993d6e8a12539f618f4854dd26"}, {"url": "https://git.kernel.org/stable/c/34c4effacfc329aeca5635a69fd9e0f6c90b4101"}], "x_generator": {"engine": "bippy-5f407fcff5a0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()\n\nKMSAN reported the following uninit-value access issue:\n\n=====================================================\nBUG: KMSAN: uninit-value in virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421\n virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nUninit was stored to memory at:\n virtio_transport_space_update net/vmw_vsock/virtio_transport_common.c:1274 [inline]\n virtio_transport_recv_pkt+0x1ee8/0x26a0 net/vmw_vsock/virtio_transport_common.c:1415\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nUninit was created at:\n slab_post_alloc_hook+0x105/0xad0 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x5a2/0xaf0 mm/slub.c:3523\n kmalloc_reserve+0x13c/0x4a0 net/core/skbuff.c:559\n __alloc_skb+0x2fd/0x770 net/core/skbuff.c:650\n alloc_skb include/linux/skbuff.h:1286 [inline]\n virtio_vsock_alloc_skb include/linux/virtio_vsock.h:66 [inline]\n virtio_transport_alloc_skb+0x90/0x11e0 net/vmw_vsock/virtio_transport_common.c:58\n virtio_transport_reset_no_sock net/vmw_vsock/virtio_transport_common.c:957 [inline]\n virtio_transport_recv_pkt+0x1279/0x26a0 net/vmw_vsock/virtio_transport_common.c:1387\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nCPU: 1 PID: 10664 Comm: kworker/1:5 Not tainted 6.6.0-rc3-00146-g9f3ebbef746f #3\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc38 04/01/2014\nWorkqueue: vsock-loopback vsock_loopback_work\n=====================================================\n\nThe following simple reproducer can cause the issue described above:\n\nint main(void)\n{\n int sock;\n struct sockaddr_vm addr = {\n .svm_family = AF_VSOCK,\n .svm_cid = VMADDR_CID_ANY,\n .svm_port = 1234,\n };\n\n sock = socket(AF_VSOCK, SOCK_STREAM, 0);\n connect(sock, (struct sockaddr *)&addr, sizeof(addr));\n return 0;\n}\n\nThis issue occurs because the `buf_alloc` and `fwd_cnt` fields of the\n`struct virtio_vsock_hdr` are not initialized when a new skb is allocated\nin `virtio_transport_init_hdr()`. This patch resolves the issue by\ninitializing these fields during allocation."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T08:27:00.826Z"}}}, "cveMetadata": {"cveId": "CVE-2023-52842", "state": "PUBLISHED", "dateUpdated": "2024-12-19T08:27:00.826Z", "dateReserved": "2024-05-21T15:19:24.254Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T15:31:41.180Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/vmw_vsock/virtio_transport_common.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "cd12535b97dd7d18cf655ec78ce1cf1f29a576be", "status": "affected", "version": "baddcc2c71572968cdaeee1c4ab3dc0ad90fa765", "versionType": "git"}, {"lessThan": "0b8906fb48b99e993d6e8a12539f618f4854dd26", "status": "affected", "version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20", "versionType": "git"}, {"lessThan": "34c4effacfc329aeca5635a69fd9e0f6c90b4101", "status": "affected", "version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/vmw_vsock/virtio_transport_common.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.7", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FAEE6030-A62C-4D18-8A7F-E88F936021CB", "versionEndExcluding": "6.6.2", "versionStartIncluding": "6.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()\n\nKMSAN reported the following uninit-value access issue:\n\n=====================================================\nBUG: KMSAN: uninit-value in virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421\n virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nUninit was stored to memory at:\n virtio_transport_space_update net/vmw_vsock/virtio_transport_common.c:1274 [inline]\n virtio_transport_recv_pkt+0x1ee8/0x26a0 net/vmw_vsock/virtio_transport_common.c:1415\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nUninit was created at:\n slab_post_alloc_hook+0x105/0xad0 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x5a2/0xaf0 mm/slub.c:3523\n kmalloc_reserve+0x13c/0x4a0 net/core/skbuff.c:559\n __alloc_skb+0x2fd/0x770 net/core/skbuff.c:650\n alloc_skb include/linux/skbuff.h:1286 [inline]\n virtio_vsock_alloc_skb include/linux/virtio_vsock.h:66 [inline]\n virtio_transport_alloc_skb+0x90/0x11e0 net/vmw_vsock/virtio_transport_common.c:58\n virtio_transport_reset_no_sock net/vmw_vsock/virtio_transport_common.c:957 [inline]\n virtio_transport_recv_pkt+0x1279/0x26a0 net/vmw_vsock/virtio_transport_common.c:1387\n vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\n process_one_work kernel/workqueue.c:2630 [inline]\n process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\n worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\n kthread+0x3cc/0x520 kernel/kthread.c:388\n ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nCPU: 1 PID: 10664 Comm: kworker/1:5 Not tainted 6.6.0-rc3-00146-g9f3ebbef746f #3\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc38 04/01/2014\nWorkqueue: vsock-loopback vsock_loopback_work\n=====================================================\n\nThe following simple reproducer can cause the issue described above:\n\nint main(void)\n{\n int sock;\n struct sockaddr_vm addr = {\n .svm_family = AF_VSOCK,\n .svm_cid = VMADDR_CID_ANY,\n .svm_port = 1234,\n };\n\n sock = socket(AF_VSOCK, SOCK_STREAM, 0);\n connect(sock, (struct sockaddr *)&addr, sizeof(addr));\n return 0;\n}\n\nThis issue occurs because the `buf_alloc` and `fwd_cnt` fields of the\n`struct virtio_vsock_hdr` are not initialized when a new skb is allocated\nin `virtio_transport_init_hdr()`. This patch resolves the issue by\ninitializing these fields during allocation."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: virtio/vsock: corrige el valor uninit en virtio_transport_recv_pkt(). KMSAN inform\u00f3 el siguiente problema de acceso al valor uninit: ================ ===================================== ERROR: KMSAN: valor uninit en virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421 virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421 vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120 Process_one_work workqueue.c:2630 [en l\u00ednea] process_scheduled_works+ 0xff6/0x1e60 kernel/workqueue.c:2703 worker_thread+0xeca/0x14d0 kernel/workqueue.c:2784 kthread+0x3cc/0x520 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Uninit se almacen\u00f3 en la memoria en: virtio_transport_space_update net/vmw_vsock/virtio_transport_common.c:1274 [en l\u00ednea] virtio_transport_recv_pkt+0x1ee8/0x26a0 net/vmw_vsock/virt io_transport_common.c:1415 vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120 Process_one_work kernel/workqueue.c:2630 [en l\u00ednea] Process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703 trabajador_thread+0xeca/0x14d0 kernel/workqueue.c:2784 hilo +0x3cc/0x520 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Uninit se cre\u00f3 en: slab_post_alloc_hook+ 0x105/0xad0 mm/slab.h: 767 slab_alloc_node mm/slub.c: 3478 [inline] kmem_cache_alloc_node+0x5a2/0xaf0 mm/slub.c: 3523 kmalloc_reserve+0x13c/0x4a0 net/skbuff. fd /0x770 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1286 [en l\u00ednea] virtio_vsock_alloc_skb include/linux/virtio_vsock.h:66 [en l\u00ednea] virtio_transport_alloc_skb+0x90/0x11e0 net/vmw_vsock/virtio_transport_common.c: 58 virtio_transport_reset_no_sock net/vmw_vsock/virtio_transport_common.c:957 [en l\u00ednea] virtio_transport_recv_pkt+0x1279/0x26a0 net/vmw_vsock/virtio_transport_common.c:1387 vsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/v sock_loopback.c:120 proceso_one_work kernel/workqueue.c:2630 [en l\u00ednea] Process_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703 trabajador_thread+0xeca/0x14d0 kernel/workqueue.c:2784 kthread+0x3cc/0x520 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/ Process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 CPU: 1 PID: 10664 Comm: kworker/1:5 No contaminado 6.6.0-rc3-00146-g9f3ebbef746f #3 Nombre de hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc38 01/04/2014 Cola de trabajo: vsock-loopback vsock_loopback_work ===================== ================================= El siguiente reproductor simple puede causar el problema descrito anteriormente: int main(void) { calcet\u00edn interno; struct sockaddr_vm addr = { .svm_family = AF_VSOCK, .svm_cid = VMADDR_CID_ANY, .svm_port = 1234, }; sock = socket(AF_VSOCK, SOCK_STREAM, 0); connect(socket, (struct sockaddr *)&addr, sizeof(addr)); return 0; } Este problema ocurre porque los campos `buf_alloc` y `fwd_cnt` de `struct virtio_vsock_hdr` no se inicializan cuando se asigna un nuevo skb en `virtio_transport_init_hdr()`. Este parche resuelve el problema inicializando estos campos durante la asignaci\u00f3n."}], "id": "CVE-2023-52842", "lastModified": "2026-06-17T06:43:42.597", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52842", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-21T17:26:02.672939Z", "version": "2.0.3"}}]}, "published": "2024-05-21T16:15:21.510", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0b8906fb48b99e993d6e8a12539f618f4854dd26"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34c4effacfc329aeca5635a69fd9e0f6c90b4101"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cd12535b97dd7d18cf655ec78ce1cf1f29a576be"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0b8906fb48b99e993d6e8a12539f618f4854dd26"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34c4effacfc329aeca5635a69fd9e0f6c90b4101"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cd12535b97dd7d18cf655ec78ce1cf1f29a576be"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: virtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()", "id": "2282696", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282696"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-665", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nvirtio/vsock: Fix uninit-value in virtio_transport_recv_pkt()\nKMSAN reported the following uninit-value access issue:\n=====================================================\nBUG: KMSAN: uninit-value in virtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421\nvirtio_transport_recv_pkt+0x1dfb/0x26a0 net/vmw_vsock/virtio_transport_common.c:1421\nvsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\nprocess_one_work kernel/workqueue.c:2630 [inline]\nprocess_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\nworker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\nkthread+0x3cc/0x520 kernel/kthread.c:388\nret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\nret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\nUninit was stored to memory at:\nvirtio_transport_space_update net/vmw_vsock/virtio_transport_common.c:1274 [inline]\nvirtio_transport_recv_pkt+0x1ee8/0x26a0 net/vmw_vsock/virtio_transport_common.c:1415\nvsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\nprocess_one_work kernel/workqueue.c:2630 [inline]\nprocess_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\nworker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\nkthread+0x3cc/0x520 kernel/kthread.c:388\nret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\nret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\nUninit was created at:\nslab_post_alloc_hook+0x105/0xad0 mm/slab.h:767\nslab_alloc_node mm/slub.c:3478 [inline]\nkmem_cache_alloc_node+0x5a2/0xaf0 mm/slub.c:3523\nkmalloc_reserve+0x13c/0x4a0 net/core/skbuff.c:559\n__alloc_skb+0x2fd/0x770 net/core/skbuff.c:650\nalloc_skb include/linux/skbuff.h:1286 [inline]\nvirtio_vsock_alloc_skb include/linux/virtio_vsock.h:66 [inline]\nvirtio_transport_alloc_skb+0x90/0x11e0 net/vmw_vsock/virtio_transport_common.c:58\nvirtio_transport_reset_no_sock net/vmw_vsock/virtio_transport_common.c:957 [inline]\nvirtio_transport_recv_pkt+0x1279/0x26a0 net/vmw_vsock/virtio_transport_common.c:1387\nvsock_loopback_work+0x3bb/0x5a0 net/vmw_vsock/vsock_loopback.c:120\nprocess_one_work kernel/workqueue.c:2630 [inline]\nprocess_scheduled_works+0xff6/0x1e60 kernel/workqueue.c:2703\nworker_thread+0xeca/0x14d0 kernel/workqueue.c:2784\nkthread+0x3cc/0x520 kernel/kthread.c:388\nret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\nret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\nCPU: 1 PID: 10664 Comm: kworker/1:5 Not tainted 6.6.0-rc3-00146-g9f3ebbef746f #3\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc38 04/01/2014\nWorkqueue: vsock-loopback vsock_loopback_work\n=====================================================\nThe following simple reproducer can cause the issue described above:\nint main(void)\n{\nint sock;\nstruct sockaddr_vm addr = {\n.svm_family = AF_VSOCK,\n.svm_cid = VMADDR_CID_ANY,\n.svm_port = 1234,\n};\nsock = socket(AF_VSOCK, SOCK_STREAM, 0);\nconnect(sock, (struct sockaddr *)&addr, sizeof(addr));\nreturn 0;\n}\nThis issue occurs because the `buf_alloc` and `fwd_cnt` fields of the\n`struct virtio_vsock_hdr` are not initialized when a new skb is allocated\nin `virtio_transport_init_hdr()`. This patch resolves the issue by\ninitializing these fields during allocation."], "name": "CVE-2023-52842", "package_state": [{"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52842\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52842\nhttps://lore.kernel.org/linux-cve-announce/2024052111-CVE-2023-52842-711c@gregkh/T"], "threat_severity": "Low"}

{}