CVE-2024-26638

CVE Details

Release Date:

2024-03-18

Description

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

See more information about CVE-2024-26638 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.4	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-7000	2024-09-24
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14