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by default.\n\n[1]\n BUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n inet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:879\n sock_recvmsg_nosec net/socket.c:1044 [inline]\n sock_recvmsg+0x12b/0x1e0 net/socket.c:1066\n __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538\n nbd_read_reply drivers/block/nbd.c:732 [inline]\n recv_work+0x262/0x3100 drivers/block/nbd.c:863\n process_one_work kernel/workqueue.c:2627 [inline]\n process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700\n worker_thread+0xf45/0x1490 kernel/workqueue.c:2781\n kthread+0x3ed/0x540 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:242\n\nLocal variable msg created at:\n __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513\n nbd_read_reply drivers/block/nbd.c:732 [inline]\n recv_work+0x262/0x3100 drivers/block/nbd.c:863\n\nCPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\nWorkqueue: nbd5-recv recv_work"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.76", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.15", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7.3", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8", "versionStartIncluding": "5.19"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:01:17.550Z"}}}, "cveMetadata": 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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "47D5FAE2-2345-4CEF-88F4-923DBF22EB88", "versionEndExcluding": "6.1.76", "versionStartIncluding": "5.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "87C718CB-AE3D-4B07-B4D9-BFF64183C468", "versionEndExcluding": "6.6.15", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "58FD5308-148A-40D3-B36A-0CA6B434A8BF", "versionEndExcluding": "6.7.3", "versionStartIncluding": "6.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: always initialize struct msghdr completely\n\nsyzbot complains that msg->msg_get_inq value can be uninitialized [1]\n\nstruct msghdr got many new fields recently, we should always make\nsure their values is zero by default.\n\n[1]\n BUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n inet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:879\n sock_recvmsg_nosec net/socket.c:1044 [inline]\n sock_recvmsg+0x12b/0x1e0 net/socket.c:1066\n __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538\n nbd_read_reply drivers/block/nbd.c:732 [inline]\n recv_work+0x262/0x3100 drivers/block/nbd.c:863\n process_one_work kernel/workqueue.c:2627 [inline]\n process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700\n worker_thread+0xf45/0x1490 kernel/workqueue.c:2781\n kthread+0x3ed/0x540 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:242\n\nLocal variable msg created at:\n __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513\n nbd_read_reply drivers/block/nbd.c:732 [inline]\n recv_work+0x262/0x3100 drivers/block/nbd.c:863\n\nCPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\nWorkqueue: nbd5-recv recv_work"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nbd: siempre inicializa completamente la estructura msghdr syzbot se queja de que el valor msg->msg_get_inq puede no estar inicializado [1] la estructura msghdr obtuvo muchos campos nuevos recientemente, siempre debemos asegurarnos de que sus valores sean cero por defecto. [1] ERROR: KMSAN: valor uninit en tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571 tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571 inet_recvmsg+0x131/0x580 net/ipv4/af_inet. c:879 sock_recvmsg_nosec net/socket.c:1044 [en l\u00ednea] sock_recvmsg+0x12b/0x1e0 net/socket.c:1066 __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538 nbd_read_reply drivers/block/nbd.c:732 [en l\u00ednea] recv_work+0x262/0x3100 drivers/block/nbd.c:863 Process_one_work kernel/workqueue.c:2627 [en l\u00ednea] Process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700 workqueue.c :2781 kthread+0x3ed/0x540 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:242 Mensaje de variable local creado en: __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513 nbd_read_reply drivers/block/nbd.c:732 [en l\u00ednea] recv_work+0x262/0x3100 drivers/block/nbd.c:863 CPU: 1 PID: 7465 Comm : kworker/u5:1 No contaminado 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 17/11/2023 Cola de trabajo: nbd5-recv recv_work"}], "id": "CVE-2024-26638", "lastModified": "2025-03-19T16:27:18.550", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-03-18T11:15:10.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/78fbb92af27d0982634116c7a31065f24d092826"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b0028f333420a65a53a63978522db680b37379dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d9c54763e5cdbbd3f81868597fe8aca3c96e6387"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/78fbb92af27d0982634116c7a31065f24d092826"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b0028f333420a65a53a63978522db680b37379dd"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d9c54763e5cdbbd3f81868597fe8aca3c96e6387"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:7000", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.22.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2025:9584", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "kernel-0:5.14.0-427.74.1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-06-25T00:00:00Z"}], "bugzilla": {"description": "kernel: nbd: always initialize struct msghdr completely", "id": "2270103", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2270103"}, "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": "verified"}, "cwe": "CWE-456", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnbd: always initialize struct msghdr completely\nsyzbot complains that msg->msg_get_inq value can be uninitialized [1]\nstruct msghdr got many new fields recently, we should always make\nsure their values is zero by default.\n[1]\nBUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\ntcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\ninet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:879\nsock_recvmsg_nosec net/socket.c:1044 [inline]\nsock_recvmsg+0x12b/0x1e0 net/socket.c:1066\n__sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538\nnbd_read_reply drivers/block/nbd.c:732 [inline]\nrecv_work+0x262/0x3100 drivers/block/nbd.c:863\nprocess_one_work kernel/workqueue.c:2627 [inline]\nprocess_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700\nworker_thread+0xf45/0x1490 kernel/workqueue.c:2781\nkthread+0x3ed/0x540 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:242\nLocal variable msg created at:\n__sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513\nnbd_read_reply drivers/block/nbd.c:732 [inline]\nrecv_work+0x262/0x3100 drivers/block/nbd.c:863\nCPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\nWorkqueue: nbd5-recv recv_work"], "name": "CVE-2024-26638", "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-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26638\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26638\nhttps://lore.kernel.org/linux-cve-announce/20240318101458.2835626-16-lee@kernel.org/T"], "threat_severity": "Low"}

{}