ghsa-7r25-m49h-vw58
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
virtiofs: fix memory leak in virtio_fs_probe()
When accidentally passing twice the same tag to qemu, kmemleak ended up reporting a memory leak in virtiofs. Also, looking at the log I saw the following error (that's when I realised the duplicated tag):
virtiofs: probe of virtio5 failed with error -17
Here's the kmemleak log for reference:
unreferenced object 0xffff888103d47800 (size 1024): comm "systemd-udevd", pid 118, jiffies 4294893780 (age 18.340s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff ................ backtrace: [<000000000ebb87c1>] virtio_fs_probe+0x171/0x7ae [virtiofs] [<00000000f8aca419>] virtio_dev_probe+0x15f/0x210 [<000000004d6baf3c>] really_probe+0xea/0x430 [<00000000a6ceeac8>] device_driver_attach+0xa8/0xb0 [<00000000196f47a7>] __driver_attach+0x98/0x140 [<000000000b20601d>] bus_for_each_dev+0x7b/0xc0 [<00000000399c7b7f>] bus_add_driver+0x11b/0x1f0 [<0000000032b09ba7>] driver_register+0x8f/0xe0 [<00000000cdd55998>] 0xffffffffa002c013 [<000000000ea196a2>] do_one_initcall+0x64/0x2e0 [<0000000008f727ce>] do_init_module+0x5c/0x260 [<000000003cdedab6>] __do_sys_finit_module+0xb5/0x120 [<00000000ad2f48c6>] do_syscall_64+0x33/0x40 [<00000000809526b5>] entry_SYSCALL_64_after_hwframe+0x44/0xae
{
"affected": [],
"aliases": [
"CVE-2021-46956"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-27T19:04:06Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtiofs: fix memory leak in virtio_fs_probe()\n\nWhen accidentally passing twice the same tag to qemu, kmemleak ended up\nreporting a memory leak in virtiofs. Also, looking at the log I saw the\nfollowing error (that\u0027s when I realised the duplicated tag):\n\n virtiofs: probe of virtio5 failed with error -17\n\nHere\u0027s the kmemleak log for reference:\n\nunreferenced object 0xffff888103d47800 (size 1024):\n comm \"systemd-udevd\", pid 118, jiffies 4294893780 (age 18.340s)\n hex dump (first 32 bytes):\n 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N..........\n ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff ................\n backtrace:\n [\u003c000000000ebb87c1\u003e] virtio_fs_probe+0x171/0x7ae [virtiofs]\n [\u003c00000000f8aca419\u003e] virtio_dev_probe+0x15f/0x210\n [\u003c000000004d6baf3c\u003e] really_probe+0xea/0x430\n [\u003c00000000a6ceeac8\u003e] device_driver_attach+0xa8/0xb0\n [\u003c00000000196f47a7\u003e] __driver_attach+0x98/0x140\n [\u003c000000000b20601d\u003e] bus_for_each_dev+0x7b/0xc0\n [\u003c00000000399c7b7f\u003e] bus_add_driver+0x11b/0x1f0\n [\u003c0000000032b09ba7\u003e] driver_register+0x8f/0xe0\n [\u003c00000000cdd55998\u003e] 0xffffffffa002c013\n [\u003c000000000ea196a2\u003e] do_one_initcall+0x64/0x2e0\n [\u003c0000000008f727ce\u003e] do_init_module+0x5c/0x260\n [\u003c000000003cdedab6\u003e] __do_sys_finit_module+0xb5/0x120\n [\u003c00000000ad2f48c6\u003e] do_syscall_64+0x33/0x40\n [\u003c00000000809526b5\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae",
"id": "GHSA-7r25-m49h-vw58",
"modified": "2024-02-27T21:31:27Z",
"published": "2024-02-27T21:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46956"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15"
}
],
"schema_version": "1.4.0",
"severity": []
}
- 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.