ghsa-7r2w-9mrv-hfqg
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
net: hamradio: fix memory leak in mkiss_close
My local syzbot instance hit memory leak in mkiss_open()[1]. The problem was in missing free_netdev() in mkiss_close().
In mkiss_open() netdevice is allocated and then registered, but in mkiss_close() netdevice was only unregistered, but not freed.
Fail log:
BUG: memory leak unreferenced object 0xffff8880281ba000 (size 4096): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............ backtrace: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x98/0xe80 [] mkiss_open+0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] entry_SYSCALL_64_after_hwframe+0x44/0xae
BUG: memory leak unreferenced object 0xffff8880141a9a00 (size 96): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@.......... backtrace: [] __hw_addr_create_ex+0x5b/0x310 [] __hw_addr_add_ex+0x1f8/0x2b0 [] dev_addr_init+0x10b/0x1f0 [] alloc_netdev_mqs+0x13b/0xe80 [] mkiss_open+0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] entry_SYSCALL_64_after_hwframe+0x44/0xae
BUG: memory leak unreferenced object 0xffff8880219bfc00 (size 512): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x777/0xe80 [] mkiss_open+0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] entry_SYSCALL_64_after_hwframe+0x44/0xae
BUG: memory leak unreferenced object 0xffff888029b2b200 (size 256): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x912/0xe80 [] mkiss_open+0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] entry_SYSCALL_64_after_hwframe+0x44/0xae
{
"affected": [],
"aliases": [
"CVE-2021-47237"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-21T15:15:12Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hamradio: fix memory leak in mkiss_close\n\nMy local syzbot instance hit memory leak in\nmkiss_open()[1]. The problem was in missing\nfree_netdev() in mkiss_close().\n\nIn mkiss_open() netdevice is allocated and then\nregistered, but in mkiss_close() netdevice was\nonly unregistered, but not freed.\n\nFail log:\n\nBUG: memory leak\nunreferenced object 0xffff8880281ba000 (size 4096):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0.............\n 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .\u0027.*............\n backtrace:\n [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\n [\u003cffffffff8706e7e8\u003e] alloc_netdev_mqs+0x98/0xe80\n [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\n [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\n [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\n [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\n [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\n [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\n [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880141a9a00 (size 96):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(....\n 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@..........\n backtrace:\n [\u003cffffffff8709f68b\u003e] __hw_addr_create_ex+0x5b/0x310\n [\u003cffffffff8709fb38\u003e] __hw_addr_add_ex+0x1f8/0x2b0\n [\u003cffffffff870a0c7b\u003e] dev_addr_init+0x10b/0x1f0\n [\u003cffffffff8706e88b\u003e] alloc_netdev_mqs+0x13b/0xe80\n [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\n [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\n [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\n [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\n [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\n [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\n [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880219bfc00 (size 512):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............\n 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................\n backtrace:\n [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\n [\u003cffffffff8706eec7\u003e] alloc_netdev_mqs+0x777/0xe80\n [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\n [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\n [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\n [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\n [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\n [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\n [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff888029b2b200 (size 256):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\n [\u003cffffffff8706f062\u003e] alloc_netdev_mqs+0x912/0xe80\n [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\n [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\n [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\n [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\n [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\n [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\n [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae",
"id": "GHSA-7r2w-9mrv-hfqg",
"modified": "2024-12-30T21:30:46Z",
"published": "2024-05-21T15:31:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47237"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
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