CVE-2021-47196

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47196", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.115Z", "datePublished": "2024-04-10T18:56:32.634Z", "dateUpdated": "2026-08-05T08:46:39.150Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:46:39.150Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Set send and receive CQ before forwarding to the driver\n\nPreset both receive and send CQ pointers prior to call to the drivers and\noverwrite it later again till the mlx4 is going to be changed do not\noverwrite ibqp properties.\n\nThis change is needed for mlx5, because in case of QP creation failure, it\nwill go to the path of QP destroy which relies on proper CQ pointers.\n\n BUG: KASAN: use-after-free in create_qp.cold+0x164/0x16e [mlx5_ib]\n Write of size 8 at addr ffff8880064c55c0 by task a.out/246\n\n CPU: 0 PID: 246 Comm: a.out Not tainted 5.15.0+ #291\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n Call Trace:\n dump_stack_lvl+0x45/0x59\n print_address_description.constprop.0+0x1f/0x140\n kasan_report.cold+0x83/0xdf\n create_qp.cold+0x164/0x16e [mlx5_ib]\n mlx5_ib_create_qp+0x358/0x28a0 [mlx5_ib]\n create_qp.part.0+0x45b/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n Allocated by task 246:\n kasan_save_stack+0x1b/0x40\n __kasan_kmalloc+0xa4/0xd0\n create_qp.part.0+0x92/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n Freed by task 246:\n kasan_save_stack+0x1b/0x40\n kasan_set_track+0x1c/0x30\n kasan_set_free_info+0x20/0x30\n __kasan_slab_free+0x10c/0x150\n slab_free_freelist_hook+0xb4/0x1b0\n kfree+0xe7/0x2a0\n create_qp.part.0+0x52b/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae"}], "metrics": [{"cvssV3_1": {"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"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached only through local RDMA userspace verbs (ioctl/write on /dev/infiniband/uverbsN \u2192 UVERBS_METHOD_QP_CREATE \u2192 ib_create_qp_user \u2192 create_qp), not via remotely processed packets.\nAC:L - An attacker who can open uverbs can reliably force the failure path (e.g., successful mlx5 QP create that links into CQ lists, then a post-create failure such as a bad response buffer) without depending on races or other conditions outside their control.\nPR:L - Creating a QP requires only an unprivileged local process with access to the uverbs device; documentation states verbs are intended for non-privileged use, and only special QP types (e.g., RAW_PACKET) need CAP_NET_RAW.\nUI:N - The attacker triggers the vulnerable QP create/destroy path themselves via their own uverbs commands; no victim action is required.\nS:U - Impact is confined to the local kernel privilege boundary (memory corruption / potential privilege escalation); it does not cross a VM, IOMMU, or other separate security authority.\nC:H - This is a heap use-after-free (QP remains on CQ lists after kfree), which can be leveraged for arbitrary kernel memory disclosure via UAF primitives.\nI:H - The same UAF/list corruption yields a write primitive suitable for heap manipulation and control-flow hijacking, so integrity impact is High.\nA:H - The UAF reliably causes kernel memory corruption and can oops/panic the kernel even when not fully exploited for code execution."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/core/verbs.c"], "versions": [{"version": "514aee660df493cd673154a6ba6bab745ec47b8c", "lessThan": "b70e072feffa0ba5c41a99b9524b9878dee7748e", "status": "affected", "versionType": "git"}, {"version": "514aee660df493cd673154a6ba6bab745ec47b8c", "lessThan": "6cd7397d01c4a3e09757840299e4f114f0aa5fa0", "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/infiniband/core/verbs.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.5", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.16", "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": "5.15", "versionEndExcluding": "5.15.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b70e072feffa0ba5c41a99b9524b9878dee7748e"}, {"url": "https://git.kernel.org/stable/c/6cd7397d01c4a3e09757840299e4f114f0aa5fa0"}], "title": "RDMA/core: Set send and receive CQ before forwarding to the driver", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47196", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-04-10T19:32:29.319944Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:15:04.498Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.459Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/b70e072feffa0ba5c41a99b9524b9878dee7748e", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/6cd7397d01c4a3e09757840299e4f114f0aa5fa0", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/b70e072feffa0ba5c41a99b9524b9878dee7748e", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/6cd7397d01c4a3e09757840299e4f114f0aa5fa0", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.459Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47196", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-04-10T19:32:29.319944Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-23T19:01:23.012Z"}, "title": "CISA ADP Vulnrichment"}], "cna": {"title": "RDMA/core: Set send and receive CQ before forwarding to the driver", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached only through local RDMA userspace verbs (ioctl/write on /dev/infiniband/uverbsN \u2192 UVERBS_METHOD_QP_CREATE \u2192 ib_create_qp_user \u2192 create_qp), not via remotely processed packets.\nAC:L - An attacker who can open uverbs can reliably force the failure path (e.g., successful mlx5 QP create that links into CQ lists, then a post-create failure such as a bad response buffer) without depending on races or other conditions outside their control.\nPR:L - Creating a QP requires only an unprivileged local process with access to the uverbs device; documentation states verbs are intended for non-privileged use, and only special QP types (e.g., RAW_PACKET) need CAP_NET_RAW.\nUI:N - The attacker triggers the vulnerable QP create/destroy path themselves via their own uverbs commands; no victim action is required.\nS:U - Impact is confined to the local kernel privilege boundary (memory corruption / potential privilege escalation); it does not cross a VM, IOMMU, or other separate security authority.\nC:H - This is a heap use-after-free (QP remains on CQ lists after kfree), which can be leveraged for arbitrary kernel memory disclosure via UAF primitives.\nI:H - The same UAF/list corruption yields a write primitive suitable for heap manipulation and control-flow hijacking, so integrity impact is High.\nA:H - The UAF reliably causes kernel memory corruption and can oops/panic the kernel even when not fully exploited for code execution."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "514aee660df493cd673154a6ba6bab745ec47b8c", "lessThan": "b70e072feffa0ba5c41a99b9524b9878dee7748e", "versionType": "git"}, {"status": "affected", "version": "514aee660df493cd673154a6ba6bab745ec47b8c", "lessThan": "6cd7397d01c4a3e09757840299e4f114f0aa5fa0", "versionType": "git"}], "programFiles": ["drivers/infiniband/core/verbs.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"status": "unaffected", "version": "0", "lessThan": "5.15", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.5", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/infiniband/core/verbs.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/b70e072feffa0ba5c41a99b9524b9878dee7748e"}, {"url": "https://git.kernel.org/stable/c/6cd7397d01c4a3e09757840299e4f114f0aa5fa0"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Set send and receive CQ before forwarding to the driver\n\nPreset both receive and send CQ pointers prior to call to the drivers and\noverwrite it later again till the mlx4 is going to be changed do not\noverwrite ibqp properties.\n\nThis change is needed for mlx5, because in case of QP creation failure, it\nwill go to the path of QP destroy which relies on proper CQ pointers.\n\n BUG: KASAN: use-after-free in create_qp.cold+0x164/0x16e [mlx5_ib]\n Write of size 8 at addr ffff8880064c55c0 by task a.out/246\n\n CPU: 0 PID: 246 Comm: a.out Not tainted 5.15.0+ #291\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n Call Trace:\n dump_stack_lvl+0x45/0x59\n print_address_description.constprop.0+0x1f/0x140\n kasan_report.cold+0x83/0xdf\n create_qp.cold+0x164/0x16e [mlx5_ib]\n mlx5_ib_create_qp+0x358/0x28a0 [mlx5_ib]\n create_qp.part.0+0x45b/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n Allocated by task 246:\n kasan_save_stack+0x1b/0x40\n __kasan_kmalloc+0xa4/0xd0\n create_qp.part.0+0x92/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n Freed by task 246:\n kasan_save_stack+0x1b/0x40\n kasan_set_track+0x1c/0x30\n kasan_set_free_info+0x20/0x30\n __kasan_slab_free+0x10c/0x150\n slab_free_freelist_hook+0xb4/0x1b0\n kfree+0xe7/0x2a0\n create_qp.part.0+0x52b/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.5", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.16", "versionStartIncluding": "5.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:46:39.150Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47196", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:46:39.150Z", "dateReserved": "2024-03-25T09:12:14.115Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-10T18:56:32.634Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/core/verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b70e072feffa0ba5c41a99b9524b9878dee7748e", "status": "affected", "version": "514aee660df493cd673154a6ba6bab745ec47b8c", "versionType": "git"}, {"lessThan": "6cd7397d01c4a3e09757840299e4f114f0aa5fa0", "status": "affected", "version": "514aee660df493cd673154a6ba6bab745ec47b8c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/core/verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3DE5A3A1-0D1D-4E9D-82C3-064537088279", "versionEndExcluding": "5.15.5", "versionStartIncluding": "5.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*", "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Set send and receive CQ before forwarding to the driver\n\nPreset both receive and send CQ pointers prior to call to the drivers and\noverwrite it later again till the mlx4 is going to be changed do not\noverwrite ibqp properties.\n\nThis change is needed for mlx5, because in case of QP creation failure, it\nwill go to the path of QP destroy which relies on proper CQ pointers.\n\n BUG: KASAN: use-after-free in create_qp.cold+0x164/0x16e [mlx5_ib]\n Write of size 8 at addr ffff8880064c55c0 by task a.out/246\n\n CPU: 0 PID: 246 Comm: a.out Not tainted 5.15.0+ #291\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n Call Trace:\n dump_stack_lvl+0x45/0x59\n print_address_description.constprop.0+0x1f/0x140\n kasan_report.cold+0x83/0xdf\n create_qp.cold+0x164/0x16e [mlx5_ib]\n mlx5_ib_create_qp+0x358/0x28a0 [mlx5_ib]\n create_qp.part.0+0x45b/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n Allocated by task 246:\n kasan_save_stack+0x1b/0x40\n __kasan_kmalloc+0xa4/0xd0\n create_qp.part.0+0x92/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n Freed by task 246:\n kasan_save_stack+0x1b/0x40\n kasan_set_track+0x1c/0x30\n kasan_set_free_info+0x20/0x30\n __kasan_slab_free+0x10c/0x150\n slab_free_freelist_hook+0xb4/0x1b0\n kfree+0xe7/0x2a0\n create_qp.part.0+0x52b/0x6a0 [ib_core]\n ib_create_qp_user+0x97/0x150 [ib_core]\n ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\n ib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n __x64_sys_ioctl+0x866/0x14d0\n do_syscall_64+0x3d/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/core: Establecer el CQ de env\u00edo y recepci\u00f3n antes de reenviar al controlador Preestablecer los punteros CQ de env\u00edo y recepci\u00f3n antes de llamar a los controladores y sobrescribirlos m\u00e1s tarde nuevamente hasta que se vaya a cambiar mlx4 no sobrescribir las propiedades ibqp. Este cambio es necesario para mlx5, porque en caso de falla en la creaci\u00f3n de QP, ir\u00e1 a la ruta de destrucci\u00f3n de QP que depende de punteros CQ adecuados. BUG: KASAN: use-after-free in create_qp.cold+0x164/0x16e [mlx5_ib] Write of size 8 at addr ffff8880064c55c0 by task a.out/246 CPU: 0 PID: 246 Comm: a.out Not tainted 5.15.0+ #291 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x45/0x59 print_address_description.constprop.0+0x1f/0x140 kasan_report.cold+0x83/0xdf create_qp.cold+0x164/0x16e [mlx5_ib] mlx5_ib_create_qp+0x358/0x28a0 [mlx5_ib] create_qp.part.0+0x45b/0x6a0 [ib_core] ib_create_qp_user+0x97/0x150 [ib_core] ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs] ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs] ib_uverbs_ioctl+0x169/0x260 [ib_uverbs] __x64_sys_ioctl+0x866/0x14d0 do_syscall_64+0x3d/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae Allocated by task 246: kasan_save_stack+0x1b/0x40 __kasan_kmalloc+0xa4/0xd0 create_qp.part.0+0x92/0x6a0 [ib_core] ib_create_qp_user+0x97/0x150 [ib_core] ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs] ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs] ib_uverbs_ioctl+0x169/0x260 [ib_uverbs] __x64_sys_ioctl+0x866/0x14d0 do_syscall_64+0x3d/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 246: kasan_save_stack+0x1b/0x40 kasan_set_track+0x1c/0x30 kasan_set_free_info+0x20/0x30 __kasan_slab_free+0x10c/0x150 slab_free_freelist_hook+0xb4/0x1b0 kfree+0xe7/0x2a0 create_qp.part.0+0x52b/0x6a0 [ib_core] ib_create_qp_user+0x97/0x150 [ib_core] ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs] ib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs] ib_uverbs_ioctl+0x169/0x260 [ib_uverbs] __x64_sys_ioctl+0x866/0x14d0 do_syscall_64+0x3d/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae "}], "id": "CVE-2021-47196", "lastModified": "2026-08-04T10:16:51.923", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47196", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-04-10T19:32:29.319944Z", "version": "2.0.3"}}]}, "published": "2024-04-10T19:15:47.897", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/6cd7397d01c4a3e09757840299e4f114f0aa5fa0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/b70e072feffa0ba5c41a99b9524b9878dee7748e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/6cd7397d01c4a3e09757840299e4f114f0aa5fa0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/b70e072feffa0ba5c41a99b9524b9878dee7748e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: RDMA/core: Set send and receive CQ before forwarding to the driver", "id": "2274613", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2274613"}, "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-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA/core: Set send and receive CQ before forwarding to the driver\nPreset both receive and send CQ pointers prior to call to the drivers and\noverwrite it later again till the mlx4 is going to be changed do not\noverwrite ibqp properties.\nThis change is needed for mlx5, because in case of QP creation failure, it\nwill go to the path of QP destroy which relies on proper CQ pointers.\nBUG: KASAN: use-after-free in create_qp.cold+0x164/0x16e [mlx5_ib]\nWrite of size 8 at addr ffff8880064c55c0 by task a.out/246\nCPU: 0 PID: 246 Comm: a.out Not tainted 5.15.0+ #291\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nCall Trace:\ndump_stack_lvl+0x45/0x59\nprint_address_description.constprop.0+0x1f/0x140\nkasan_report.cold+0x83/0xdf\ncreate_qp.cold+0x164/0x16e [mlx5_ib]\nmlx5_ib_create_qp+0x358/0x28a0 [mlx5_ib]\ncreate_qp.part.0+0x45b/0x6a0 [ib_core]\nib_create_qp_user+0x97/0x150 [ib_core]\nib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\nib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\nib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n__x64_sys_ioctl+0x866/0x14d0\ndo_syscall_64+0x3d/0x90\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nAllocated by task 246:\nkasan_save_stack+0x1b/0x40\n__kasan_kmalloc+0xa4/0xd0\ncreate_qp.part.0+0x92/0x6a0 [ib_core]\nib_create_qp_user+0x97/0x150 [ib_core]\nib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\nib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\nib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n__x64_sys_ioctl+0x866/0x14d0\ndo_syscall_64+0x3d/0x90\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nFreed by task 246:\nkasan_save_stack+0x1b/0x40\nkasan_set_track+0x1c/0x30\nkasan_set_free_info+0x20/0x30\n__kasan_slab_free+0x10c/0x150\nslab_free_freelist_hook+0xb4/0x1b0\nkfree+0xe7/0x2a0\ncreate_qp.part.0+0x52b/0x6a0 [ib_core]\nib_create_qp_user+0x97/0x150 [ib_core]\nib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x92c/0x1250 [ib_uverbs]\nib_uverbs_cmd_verbs+0x1c38/0x3150 [ib_uverbs]\nib_uverbs_ioctl+0x169/0x260 [ib_uverbs]\n__x64_sys_ioctl+0x866/0x14d0\ndo_syscall_64+0x3d/0x90\nentry_SYSCALL_64_after_hwframe+0x44/0xae"], "name": "CVE-2021-47196", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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": "2024-04-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47196\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47196\nhttps://lore.kernel.org/linux-cve-announce/2024041036-CVE-2021-47196-d1b8@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-07-13T11:14:52.437171+00:00", "updated": "2025-07-13T11:14:52.437244+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}