GHSA-C8GP-PFR5-2MM3
Vulnerability from github – Published: 2024-03-18 12:30 – Updated: 2024-10-31 18:31In the Linux kernel, the following vulnerability has been resolved:
nbd: always initialize struct msghdr completely
syzbot complains that msg->msg_get_inq value can be uninitialized [1]
struct msghdr got many new fields recently, we should always make sure their values is zero by default.
[1] BUG: KMSAN: uninit-value in 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 [inline] 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 [inline] recv_work+0x262/0x3100 drivers/block/nbd.c:863 process_one_work kernel/workqueue.c:2627 [inline] process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700 worker_thread+0xf45/0x1490 kernel/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
Local variable msg created at: __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513 nbd_read_reply drivers/block/nbd.c:732 [inline] recv_work+0x262/0x3100 drivers/block/nbd.c:863
CPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Workqueue: nbd5-recv recv_work
{
"affected": [],
"aliases": [
"CVE-2024-26638"
],
"database_specific": {
"cwe_ids": [
"CWE-908"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-18T11:15:10Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: always initialize struct msghdr completely\n\nsyzbot complains that msg-\u003emsg_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",
"id": "GHSA-c8gp-pfr5-2mm3",
"modified": "2024-10-31T18:31:15Z",
"published": "2024-03-18T12:30:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26638"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/78fbb92af27d0982634116c7a31065f24d092826"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b0028f333420a65a53a63978522db680b37379dd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d9c54763e5cdbbd3f81868597fe8aca3c96e6387"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
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