CVE-2022-50578
published 2025-10-22CVE-2022-50578: In the Linux kernel, the following vulnerability has been resolved: class: fix possible memory leak in __class_register() If class_add_groups() returns error…
PriorityP420low5.5
EPSS
0.23%
13.4th percentile
In the Linux kernel, the following vulnerability has been resolved:
class: fix possible memory leak in __class_register()
If class_add_groups() returns error, the 'cp->subsys' need be
unregister, and the 'cp' need be freed.
We can not call kset_unregister() here, because the 'cls' will
be freed in callback function class_release() and it's also
freed in caller's error path, it will cause double free.
So fix this by calling kobject_del() and kfree_const(name) to
cleanup kobject. Besides, call kfree() to free the 'cp'.
Fault injection test can trigger this:
unreferenced object 0xffff888102fa8190 (size 8):
comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s)
hex dump (first 8 bytes):
70 6b 74 63 64 76 64 00 pktcdvd.
backtrace:
[] __kmalloc_track_caller+0x1ae/0x320
[] kstrdup+0x3a/0x70
[] kstrdup_const+0x68/0x80
[] kvasprintf_const+0x10b/0x190
[] kobject_set_name_vargs+0x56/0x150
[] kobject_set_name+0xab/0xe0
[] __class_register+0x15c/0x49a
unreferenced object 0xffff888037274000 (size 1024):
comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s)
hex dump (first 32 bytes):
00 40 27 37 80 88 ff ff 00 40 27 37 80 88 ff ff .@'7.....@'7....
00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N..........
backtrace:
[] kmem_cache_alloc_trace+0x17c/0x2f0
[] __class_register+0x86/0x49a
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.4-1 (bookworm) | linux 6.1.4-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= ced6473e7486702f530a49f886b73195e4977734 < 4efa5443817c1b6de22d401aeca5b2481e835f8c | 4efa5443817c1b6de22d401aeca5b2481e835f8c |
| linux | linux | >= ced6473e7486702f530a49f886b73195e4977734 < 3bb9c92c27624ad076419a70f2b1a30cd1f8bbbd | 3bb9c92c27624ad076419a70f2b1a30cd1f8bbbd |
| linux | linux | >= ced6473e7486702f530a49f886b73195e4977734 < 3e0efc3f3f5e5c73996782f8db69963e501bb878 | 3e0efc3f3f5e5c73996782f8db69963e501bb878 |
| linux | linux | >= ced6473e7486702f530a49f886b73195e4977734 < 18a7200646958cf8e1b8a933de08122fc50676cd | 18a7200646958cf8e1b8a933de08122fc50676cd |
| linux | linux | >= ced6473e7486702f530a49f886b73195e4977734 < 417ef049e3fd3b0d2593c1d5ffa3d0d5d0a018a7 | 417ef049e3fd3b0d2593c1d5ffa3d0d5d0a018a7 |
| linux | linux | >= ced6473e7486702f530a49f886b73195e4977734 < e764ad5918a099ebeb909ccff83893a714e497e1 | e764ad5918a099ebeb909ccff83893a714e497e1 |
| linux | linux | >= ced6473e7486702f530a49f886b73195e4977734 < abaedb68a769e6bf36836b55a2f49b531c5f3f7b | abaedb68a769e6bf36836b55a2f49b531c5f3f7b |
| linux | linux | >= ced6473e7486702f530a49f886b73195e4977734 < 8c3e8a6bdb5253b97ad532570f8b5db5f7a06407 | 8c3e8a6bdb5253b97ad532570f8b5db5f7a06407 |
| linux | linux_kernel | >= 0 < 5.10.178-1 | 5.10.178-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 4.10.0 < 4.14.303 | 4.14.303 |
| linux | linux_kernel | >= 4.15.0 < 4.19.270 | 4.19.270 |
| linux | linux_kernel | >= 4.20.0 < 5.4.229 | 5.4.229 |
| linux | linux_kernel | >= 5.11.0 < 5.15.86 | 5.15.86 |
| linux | linux_kernel | >= 5.16.0 < 6.0.16 | 6.0.16 |
| linux | linux_kernel | >= 5.5.0 < 5.10.163 | 5.10.163 |
| linux | linux_kernel | >= 6.1.0 < 6.1.2 | 6.1.2 |
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OSV
class: fix possible memory leak in __class_register()
osv·2025-10-22
CVE-2022-50578 class: fix possible memory leak in __class_register()
class: fix possible memory leak in __class_register()
In the Linux kernel, the following vulnerability has been resolved:
class: fix possible memory leak in __class_register()
If class_add_groups() returns error, the 'cp->subsys' need be
unregister, and the 'cp' need be freed.
We can not call kset_unregister() here, because the 'cls' will
be freed in callback function class_release() and it's also
freed in caller's error path, it will cause double free.
So fix this by calling kobject_del() and kfree_const(name) to
cleanup kobject. Besides, call kfree() to free the 'cp'.
Fault injection test can trigger this:
unreferenced object 0xffff888102fa8190 (size 8):
comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s)
hex dump (first 8 bytes):
70 6b 74 63 64 76 64 00 pktcdvd.
backtrace:
GHSA
GHSA-x9pw-p3r7-mr43: In the Linux kernel, the following vulnerability has been resolved:
class: fix possible memory leak in __class_register()
If class_add_groups() retu
ghsa_unreviewed·2025-10-22
CVE-2022-50578 GHSA-x9pw-p3r7-mr43: In the Linux kernel, the following vulnerability has been resolved:
class: fix possible memory leak in __class_register()
If class_add_groups() retu
In the Linux kernel, the following vulnerability has been resolved:
class: fix possible memory leak in __class_register()
If class_add_groups() returns error, the 'cp->subsys' need be
unregister, and the 'cp' need be freed.
We can not call kset_unregister() here, because the 'cls' will
be freed in callback function class_release() and it's also
freed in caller's error path, it will cause double free.
So fix this by calling kobject_del() and kfree_const(name) to
cleanup kobject. Besides, call kfree() to free the 'cp'.
Fault injection test can trigger this:
unreferenced object 0xffff888102fa8190 (size 8):
comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s)
hex dump (first 8 bytes):
70 6b 74 63 64 76 64 00 pktcdvd.
backtrace:
[] __kmalloc_track_caller+0x1ae/0x320
[] kstrdup+0x3a/
OSV
CVE-2022-50578: In the Linux kernel, the following vulnerability has been resolved: class: fix possible memory leak in __class_register() If class_add_groups() return
osv·2025-10-22
CVE-2022-50578 CVE-2022-50578: In the Linux kernel, the following vulnerability has been resolved: class: fix possible memory leak in __class_register() If class_add_groups() return
In the Linux kernel, the following vulnerability has been resolved: class: fix possible memory leak in __class_register() If class_add_groups() returns error, the 'cp->subsys' need be unregister, and the 'cp' need be freed. We can not call kset_unregister() here, because the 'cls' will be freed in callback function class_release() and it's also freed in caller's error path, it will cause double free. So fix this by calling kobject_del() and kfree_const(name) to cleanup kobject. Besides, call kfree() to free the 'cp'. Fault injection test can trigger this: unreferenced object 0xffff888102fa8190 (size 8): comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s) hex dump (first 8 bytes): 70 6b 74 63 64 76 64 00 pktcdvd. backtrace: [] __kmalloc_track_caller+0x1ae/0x320 [] kstrdup+0x3a/0x70 [
Red Hat
kernel: Linux kernel: Memory leak in __class_register()
vendor_redhat·2025-10-22·CVSS 5.5
CVE-2022-50578 [LOW] CWE-772 kernel: Linux kernel: Memory leak in __class_register()
kernel: Linux kernel: Memory leak in __class_register()
In the Linux kernel, the following vulnerability has been resolved:
class: fix possible memory leak in __class_register()
If class_add_groups() returns error, the 'cp->subsys' need be
unregister, and the 'cp' need be freed.
We can not call kset_unregister() here, because the 'cls' will
be freed in callback function class_release() and it's also
freed in caller's error path, it will cause double free.
So fix this by calling kobject_del() and kfree_const(name) to
cleanup kobject. Besides, call kfree() to free the 'cp'.
Fault injection test can trigger this:
unreferenced object 0xffff888102fa8190 (size 8):
comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s)
hex dump (first 8 bytes):
70 6b 74 63 64 76 64 00 pktcdvd.
backtrace:
[]
Debian
CVE-2022-50578: linux - In the Linux kernel, the following vulnerability has been resolved: class: fix ...
vendor_debian·2022
CVE-2022-50578 CVE-2022-50578: linux - In the Linux kernel, the following vulnerability has been resolved: class: fix ...
In the Linux kernel, the following vulnerability has been resolved: class: fix possible memory leak in __class_register() If class_add_groups() returns error, the 'cp->subsys' need be unregister, and the 'cp' need be freed. We can not call kset_unregister() here, because the 'cls' will be freed in callback function class_release() and it's also freed in caller's error path, it will cause double free. So fix this by calling kobject_del() and kfree_const(name) to cleanup kobject. Besides, call kfree() to free the 'cp'. Fault injection test can trigger this: unreferenced object 0xffff888102fa8190 (size 8): comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s) hex dump (first 8 bytes): 70 6b 74 63 64 76 64 00 pktcdvd. backtrace: [] __kmalloc_track_caller+0x1ae/0x320 [] kstrdup+0x3a/0x70 [
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/18a7200646958cf8e1b8a933de08122fc50676cdhttps://git.kernel.org/stable/c/3bb9c92c27624ad076419a70f2b1a30cd1f8bbbdhttps://git.kernel.org/stable/c/3e0efc3f3f5e5c73996782f8db69963e501bb878https://git.kernel.org/stable/c/417ef049e3fd3b0d2593c1d5ffa3d0d5d0a018a7https://git.kernel.org/stable/c/4efa5443817c1b6de22d401aeca5b2481e835f8chttps://git.kernel.org/stable/c/8c3e8a6bdb5253b97ad532570f8b5db5f7a06407https://git.kernel.org/stable/c/abaedb68a769e6bf36836b55a2f49b531c5f3f7bhttps://git.kernel.org/stable/c/e764ad5918a099ebeb909ccff83893a714e497e1
2025-10-22
Published