fkie_cve-2022-49256
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-02-26 07:01
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
watch_queue: Actually free the watch
free_watch() does everything barring actually freeing the watch object. Fix
this by adding the missing kfree.
kmemleak produces a report something like the following. Note that as an
address can be seen in the first word, the watch would appear to have gone
through call_rcu().
BUG: memory leak
unreferenced object 0xffff88810ce4a200 (size 96):
comm "syz-executor352", pid 3605, jiffies 4294947473 (age 13.720s)
hex dump (first 32 bytes):
e0 82 48 0d 81 88 ff ff 00 00 00 00 00 00 00 00 ..H.............
80 a2 e4 0c 81 88 ff ff 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8214e6cc>] kmalloc include/linux/slab.h:581 [inline]
[<ffffffff8214e6cc>] kzalloc include/linux/slab.h:714 [inline]
[<ffffffff8214e6cc>] keyctl_watch_key+0xec/0x2e0 security/keys/keyctl.c:1800
[<ffffffff8214ec84>] __do_sys_keyctl+0x3c4/0x490 security/keys/keyctl.c:2016
[<ffffffff84493a25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff84493a25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatch_queue: Actually free the watch\n\nfree_watch() does everything barring actually freeing the watch object. Fix\nthis by adding the missing kfree.\n\nkmemleak produces a report something like the following. Note that as an\naddress can be seen in the first word, the watch would appear to have gone\nthrough call_rcu().\n\nBUG: memory leak\nunreferenced object 0xffff88810ce4a200 (size 96):\n comm \"syz-executor352\", pid 3605, jiffies 4294947473 (age 13.720s)\n hex dump (first 32 bytes):\n e0 82 48 0d 81 88 ff ff 00 00 00 00 00 00 00 00 ..H.............\n 80 a2 e4 0c 81 88 ff ff 00 00 00 00 00 00 00 00 ................\n backtrace:\n [\u003cffffffff8214e6cc\u003e] kmalloc include/linux/slab.h:581 [inline]\n [\u003cffffffff8214e6cc\u003e] kzalloc include/linux/slab.h:714 [inline]\n [\u003cffffffff8214e6cc\u003e] keyctl_watch_key+0xec/0x2e0 security/keys/keyctl.c:1800\n [\u003cffffffff8214ec84\u003e] __do_sys_keyctl+0x3c4/0x490 security/keys/keyctl.c:2016\n [\u003cffffffff84493a25\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n [\u003cffffffff84493a25\u003e] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n [\u003cffffffff84600068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: watch_queue: En realidad, libera el reloj. free_watch() hace todo lo posible, excepto liberar realmente el objeto de vigilancia. Solucione esto agregando el kfree faltante. kmemleak produce un informe similar al siguiente. Tenga en cuenta que, como se puede ver una direcci\u00f3n en la primera palabra, el reloj parecer\u00eda haber pasado por call_rcu(). ERROR: p\u00e9rdida de memoria objeto no referenciado 0xffff88810ce4a200 (tama\u00f1o 96): comm \"syz-executor352\", pid 3605, jiffies 4294947473 (edad 13.720s) volcado hexadecimal (primeros 32 bytes): e0 82 48 0d 81 88 ff ff 00 00 00 00 00 00 00 00 ..H............. 80 a2 e4 0c 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [] kmalloc include/linux/slab.h:581 [inline] [] kzalloc include/linux/slab.h:714 [inline] [] keyctl_watch_key+0xec/0x2e0 security/keys/keyctl.c:1800 [] __do_sys_keyctl+0x3c4/0x490 security/keys/keyctl.c:2016 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x44/0xae"
}
],
"id": "CVE-2022-49256",
"lastModified": "2025-02-26T07:01:02.497",
"metrics": {},
"published": "2025-02-26T07:01:02.497",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/31824613a42aacdcbeb325bf07a1c8247a11ebe2"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3d8dcf278b1ee1eff1e90be848fa2237db4c07a7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7e8c9b0df07a77f0d072603b8ced2677e30e1893"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9d92be1a09fbb3dd65600dbfe7eedb40e7228e4b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f69aecb49968e14196366bbe896eab0a904229f5"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
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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.
- 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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