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gsd-2021-47237
Vulnerability from gsd
Modified
2024-04-11 05:05
Details
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.
Aliases
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CVE-2021-47237 (GCVE-0-2021-47237)
Vulnerability from cvelistv5
Published
2024-05-21 14:19
Modified
2025-05-04 07:06
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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:
[<ffffffff81a27201>] kvmalloc_node+0x61/0xf0
[<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80
[<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]
[<ffffffff842355db>] tty_ldisc_open+0x9b/0x110
[<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670
[<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440
[<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200
[<ffffffff8911263a>] do_syscall_64+0x3a/0xb0
[<ffffffff89200068>] 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:
[<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310
[<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0
[<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0
[<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80
[<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]
[<ffffffff842355db>] tty_ldisc_open+0x9b/0x110
[<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670
[<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440
[<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200
[<ffffffff8911263a>] do_syscall_64+0x3a/0xb0
[<ffffffff89200068>] 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:
[<ffffffff81a27201>] kvmalloc_node+0x61/0xf0
[<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80
[<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]
[<ffffffff842355db>] tty_ldisc_open+0x9b/0x110
[<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670
[<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440
[<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200
[<ffffffff8911263a>] do_syscall_64+0x3a/0xb0
[<ffffffff89200068>] 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:
[<ffffffff81a27201>] kvmalloc_node+0x61/0xf0
[<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80
[<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]
[<ffffffff842355db>] tty_ldisc_open+0x9b/0x110
[<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670
[<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440
[<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200
[<ffffffff8911263a>] do_syscall_64+0x3a/0xb0
[<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 815f62bf742718458ba822a7e1f51f285eb997f2 Version: 815f62bf742718458ba822a7e1f51f285eb997f2 Version: 815f62bf742718458ba822a7e1f51f285eb997f2 Version: 815f62bf742718458ba822a7e1f51f285eb997f2 Version: 815f62bf742718458ba822a7e1f51f285eb997f2 Version: 815f62bf742718458ba822a7e1f51f285eb997f2 Version: 815f62bf742718458ba822a7e1f51f285eb997f2 Version: 815f62bf742718458ba822a7e1f51f285eb997f2 |
||
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"value": "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"
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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