{"cve":"CVE-2024-26638","nvd":{"published":"2024-03-18T11:15:10.720","modified":"2026-06-17T07:17:57.380","status":"Analyzed","description":"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","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","score":4.4},"cwes":["CWE-908"],"references":["https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406","https://git.kernel.org/stable/c/78fbb92af27d0982634116c7a31065f24d092826","https://git.kernel.org/stable/c/b0028f333420a65a53a63978522db680b37379dd","https://git.kernel.org/stable/c/d9c54763e5cdbbd3f81868597fe8aca3c96e6387","https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2024-26638","score":0.00222,"percentile":0.12772,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}