CVE-2021-47237
published 2024-05-21CVE-2021-47237: 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…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
13.3th percentile
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_l
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.46-1 (bookworm) | linux 5.10.46-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 815f62bf742718458ba822a7e1f51f285eb997f2 < c634ba0b4159838ff45a60d3a0ace3b4118077a5 | c634ba0b4159838ff45a60d3a0ace3b4118077a5 |
| linux | linux | >= 815f62bf742718458ba822a7e1f51f285eb997f2 < 3942d0f9ace1a95a74930b5b4fc0e5005c62b37b | 3942d0f9ace1a95a74930b5b4fc0e5005c62b37b |
| linux | linux | >= 815f62bf742718458ba822a7e1f51f285eb997f2 < 765a8a04f828db7222b36a42b1031f576bfe95c3 | 765a8a04f828db7222b36a42b1031f576bfe95c3 |
| linux | linux | >= 815f62bf742718458ba822a7e1f51f285eb997f2 < c16c4716a1b5ba4f83c7e00da457cba06761f119 | c16c4716a1b5ba4f83c7e00da457cba06761f119 |
| linux | linux | >= 815f62bf742718458ba822a7e1f51f285eb997f2 < a49cbb762ef20655f5c91abdc13658b0af5e159d | a49cbb762ef20655f5c91abdc13658b0af5e159d |
| linux | linux | >= 815f62bf742718458ba822a7e1f51f285eb997f2 < 290b0b6432e2599021db0b8d6046f756d931c29f | 290b0b6432e2599021db0b8d6046f756d931c29f |
| linux | linux | >= 815f62bf742718458ba822a7e1f51f285eb997f2 < f4de2b43d13b7cf3ced9310e371b90c836dbd7cd | f4de2b43d13b7cf3ced9310e371b90c836dbd7cd |
| linux | linux | >= 815f62bf742718458ba822a7e1f51f285eb997f2 < 7edcc682301492380fbdd604b4516af5ae667a13 | 7edcc682301492380fbdd604b4516af5ae667a13 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 2.6.14 < 4.4.274 | 4.4.274 |
| linux | linux_kernel | >= 4.10 < 4.14.238 | 4.14.238 |
| linux | linux_kernel | >= 4.15 < 4.19.196 | 4.19.196 |
| linux | linux_kernel | >= 4.20 < 5.4.128 | 5.4.128 |
| linux | linux_kernel | >= 4.5 < 4.9.274 | 4.9.274 |
| linux | linux_kernel | >= 5.11 < 5.12.13 | 5.12.13 |
| linux | linux_kernel | >= 5.5 < 5.10.46 | 5.10.46 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
kernel: net: hamradio: fix memory leak in mkiss_close
vendor_redhat·2024-05-21·CVSS 5.5
CVE-2021-47237 [MEDIUM] CWE-402 kernel: net: hamradio: fix memory leak in mkiss_close
kernel: net: hamradio: fix memory leak in mkiss_close
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_o
Debian
CVE-2021-47237: linux - In the Linux kernel, the following vulnerability has been resolved: net: hamrad...
vendor_debian·2021·CVSS 5.5
CVE-2021-47237 [MEDIUM] CVE-2021-47237: linux - In the Linux kernel, the following vulnerability has been resolved: net: hamrad...
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_
GHSA
GHSA-7r2w-9mrv-hfqg: In the Linux kernel, the following vulnerability has been resolved:
net: hamradio: fix memory leak in mkiss_close
My local syzbot instance hit memor
ghsa_unreviewed·2024-05-21
CVE-2021-47237 [MEDIUM] CWE-401 GHSA-7r2w-9mrv-hfqg: In the Linux kernel, the following vulnerability has been resolved:
net: hamradio: fix memory leak in mkiss_close
My local syzbot instance hit memor
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
[]
OSV
CVE-2021-47237: In the Linux kernel, the following vulnerability has been resolved: net: hamradio: fix memory leak in mkiss_close My local syzbot instance hit memory
osv·2024-05-21·CVSS 5.5
CVE-2021-47237 [MEDIUM] CVE-2021-47237: In the Linux kernel, the following vulnerability has been resolved: net: hamradio: fix memory leak in mkiss_close My local syzbot instance hit memory
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_
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29fhttps://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37bhttps://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159dhttps://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cdhttps://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29fhttps://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37bhttps://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159dhttps://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd
2024-05-21
Published