mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
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32 lines
2.2 KiB
JSON
32 lines
2.2 KiB
JSON
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{
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"id": "CVE-2024-39463",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-06-25T15:15:14.760",
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"lastModified": "2024-06-25T15:15:14.760",
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"vulnStatus": "Received",
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\n9p: add missing locking around taking dentry fid list\n\nFix a use-after-free on dentry's d_fsdata fid list when a thread\nlooks up a fid through dentry while another thread unlinks it:\n\nUAF thread:\nrefcount_t: addition on 0; use-after-free.\n p9_fid_get linux/./include/net/9p/client.h:262\n v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129\n v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181\n v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314\n v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400\n vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248\n\nFreed by:\n p9_fid_destroy (inlined)\n p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456\n p9_fid_put linux/./include/net/9p/client.h:278\n v9fs_dentry_release+0xb5/0x140 linux/fs/9p/vfs_dentry.c:55\n v9fs_remove+0x38f/0x620 linux/fs/9p/vfs_inode.c:518\n vfs_unlink+0x29a/0x810 linux/fs/namei.c:4335\n\nThe problem is that d_fsdata was not accessed under d_lock, because\nd_release() normally is only called once the dentry is otherwise no\nlonger accessible but since we also call it explicitly in v9fs_remove\nthat lock is required:\nmove the hlist out of the dentry under lock then unref its fids once\nthey are no longer accessible."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/c898afdc15645efb555acb6d85b484eb40a45409",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/cb299cdba09f46f090b843d78ba26b667d50a456",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/fe17ebf22feb4ad7094d597526d558a49aac92b4",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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}
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