GHSA-W8VV-9899-7R4V
Vulnerability from github – Published: 2025-03-14 00:30 – Updated: 2025-03-14 00:30In the Linux kernel, the following vulnerability has been resolved:
vduse: Fix NULL pointer dereference on sysfs access
The control device has no drvdata. So we will get a NULL pointer dereference when accessing control device's msg_timeout attribute via sysfs:
[ 132.841881][ T3644] BUG: kernel NULL pointer dereference, address: 00000000000000f8 [ 132.850619][ T3644] RIP: 0010:msg_timeout_show (drivers/vdpa/vdpa_user/vduse_dev.c:1271) [ 132.869447][ T3644] dev_attr_show (drivers/base/core.c:2094) [ 132.870215][ T3644] sysfs_kf_seq_show (fs/sysfs/file.c:59) [ 132.871164][ T3644] ? device_remove_bin_file (drivers/base/core.c:2088) [ 132.872082][ T3644] kernfs_seq_show (fs/kernfs/file.c:164) [ 132.872838][ T3644] seq_read_iter (fs/seq_file.c:230) [ 132.873578][ T3644] ? __vmalloc_area_node (mm/vmalloc.c:3041) [ 132.874532][ T3644] kernfs_fop_read_iter (fs/kernfs/file.c:238) [ 132.875513][ T3644] __kernel_read (fs/read_write.c:440 (discriminator 1)) [ 132.876319][ T3644] kernel_read (fs/read_write.c:459) [ 132.877129][ T3644] kernel_read_file (fs/kernel_read_file.c:94) [ 132.877978][ T3644] kernel_read_file_from_fd (include/linux/file.h:45 fs/kernel_read_file.c:186) [ 132.879019][ T3644] __do_sys_finit_module (kernel/module.c:4207) [ 132.879930][ T3644] __ia32_sys_finit_module (kernel/module.c:4189) [ 132.880930][ T3644] do_int80_syscall_32 (arch/x86/entry/common.c:112 arch/x86/entry/common.c:132) [ 132.881847][ T3644] entry_INT80_compat (arch/x86/entry/entry_64_compat.S:419)
To fix it, don't create the unneeded attribute for control device anymore.
{
"affected": [],
"aliases": [
"CVE-2022-49329"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:01:09Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: Fix NULL pointer dereference on sysfs access\n\nThe control device has no drvdata. So we will get a\nNULL pointer dereference when accessing control\ndevice\u0027s msg_timeout attribute via sysfs:\n\n[ 132.841881][ T3644] BUG: kernel NULL pointer dereference, address: 00000000000000f8\n[ 132.850619][ T3644] RIP: 0010:msg_timeout_show (drivers/vdpa/vdpa_user/vduse_dev.c:1271)\n[ 132.869447][ T3644] dev_attr_show (drivers/base/core.c:2094)\n[ 132.870215][ T3644] sysfs_kf_seq_show (fs/sysfs/file.c:59)\n[ 132.871164][ T3644] ? device_remove_bin_file (drivers/base/core.c:2088)\n[ 132.872082][ T3644] kernfs_seq_show (fs/kernfs/file.c:164)\n[ 132.872838][ T3644] seq_read_iter (fs/seq_file.c:230)\n[ 132.873578][ T3644] ? __vmalloc_area_node (mm/vmalloc.c:3041)\n[ 132.874532][ T3644] kernfs_fop_read_iter (fs/kernfs/file.c:238)\n[ 132.875513][ T3644] __kernel_read (fs/read_write.c:440 (discriminator 1))\n[ 132.876319][ T3644] kernel_read (fs/read_write.c:459)\n[ 132.877129][ T3644] kernel_read_file (fs/kernel_read_file.c:94)\n[ 132.877978][ T3644] kernel_read_file_from_fd (include/linux/file.h:45 fs/kernel_read_file.c:186)\n[ 132.879019][ T3644] __do_sys_finit_module (kernel/module.c:4207)\n[ 132.879930][ T3644] __ia32_sys_finit_module (kernel/module.c:4189)\n[ 132.880930][ T3644] do_int80_syscall_32 (arch/x86/entry/common.c:112 arch/x86/entry/common.c:132)\n[ 132.881847][ T3644] entry_INT80_compat (arch/x86/entry/entry_64_compat.S:419)\n\nTo fix it, don\u0027t create the unneeded attribute for\ncontrol device anymore.",
"id": "GHSA-w8vv-9899-7r4v",
"modified": "2025-03-14T00:30:52Z",
"published": "2025-03-14T00:30:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49329"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/30fd1b56621e187346f65d01fe34870634b15188"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3a7a81f4835dfda11f39fdd27586da14331896eb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b22fdee17ec62604060fb0fda5e1414b634666e1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b27ee76c74dc831d6e092eaebc2dfc9c0beed1c9"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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