CVE-2024-39463— 9p: add missing locking around taking dentry fid list
Affected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 154372e67d4053e56591245eb413686621941333< 3bb6763a8319170c2d41c4232c8e7e4c37dcacfb | affected |
154372e67d4053e56591245eb413686621941333< cb299cdba09f46f090b843d78ba26b667d50a456 | affected | ||
154372e67d4053e56591245eb413686621941333< f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5 | affected | ||
154372e67d4053e56591245eb413686621941333< fe17ebf22feb4ad7094d597526d558a49aac92b4 | affected | ||
154372e67d4053e56591245eb413686621941333< c898afdc15645efb555acb6d85b484eb40a45409 | affected | ||
5.11 | affected | ||
< 5.11 | unaffected | ||
5.15.168≤ 5.15.* | unaffected | ||
| … +4 more rows | |||
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2024-39463
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
9p: add missing locking around taking dentry fid list
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: 9p: add missing locking around taking dentry fid list Fix a use-after-free on dentry's d_fsdata fid list when a thread looks up a fid through dentry while another thread unlinks it: UAF thread: refcount_t: addition on 0; use-after-free. p9_fid_get linux/./include/net/9p/client.h:262 v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129 v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181 v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314 v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400 vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248 Freed by: p9_fid_destroy (inlined) p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456 p9_fid_put linux/./include/net/9p/client.h:278 v9fs_dentry_release+0xb5/0x140 linux/fs/9p/vfs_dentry.c:55 v9fs_remove+0x38f/0x620 linux/fs/9p/vfs_inode.c:518 vfs_unlink+0x29a/0x810 linux/fs/namei.c:4335 The problem is that d_fsdata was not accessed under d_lock, because d_release() normally is only called once the dentry is otherwise no longer accessible but since we also call it explicitly in v9fs_remove that lock is required: move the hlist out of the dentry under lock then unref its fids once they are no longer accessible.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于内存释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-39463
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2024-39463
请登录查看更多情报信息。
Other References for CVE-2024-39463 (5)
Same Patch Batch · Linux · 2024-06-25 · 24 CVEs total
| CVE-2024-39301 | net/9p: fix uninit-value in p9_client_rpc() | |
| CVE-2024-39471 | drm/amdgpu: add error handle to avoid out-of-bounds | |
| CVE-2024-39469 | nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors | |
| CVE-2024-39470 | eventfs: Fix a possible null pointer dereference in eventfs_find_events() | |
| CVE-2024-39468 | smb: client: fix deadlock in smb2_find_smb_tcon() | |
| CVE-2024-39467 | f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode() | |
| CVE-2024-39466 | thermal/drivers/qcom/lmh: Check for SCM availability at probe | |
| CVE-2024-39464 | media: v4l: async: Fix notifier list entry init | |
| CVE-2024-39465 | media: mgb4: Fix double debugfs remove | |
| CVE-2024-39462 | clk: bcm: dvp: Assign ->num before accessing ->hws | |
| CVE-2024-39461 | clk: bcm: rpi: Assign ->num before accessing ->hws | |
| CVE-2024-39371 | io_uring: check for non-NULL file pointer in io_file_can_poll() | |
| CVE-2021-4440 | x86/xen: Drop USERGS_SYSRET64 paravirt call | |
| CVE-2024-39298 | mm/memory-failure: fix handling of dissolved but not taken off from buddy pages | |
| CVE-2024-39296 | bonding: fix oops during rmmod | |
| CVE-2024-39293 | Revert "xsk: Support redirect to any socket bound to the same umem" | |
| CVE-2024-39276 | ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find() | |
| CVE-2024-38661 | s390/ap: Fix crash in AP internal function modify_bitmap() | |
| CVE-2024-38385 | genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after() | |
| CVE-2024-38306 | btrfs: protect folio::private when attaching extent buffer folios |
Showing top 20 of 24 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
Same vendor: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
V. Comments for CVE-2024-39463
No comments yet