CVE-2024-39276— ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()
Affected Version Matrix 23
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | b878c8a7f08f0c225b6a46ba1ac867e9c5d17807< 9ad75e78747b5a50dc5a52f0f8e92e920a653f16 | affected |
fb265c9cb49e2074ddcdd4de99728aefdd3b3592< 896a7e7d0d555ad8b2b46af0c2fa7de7467f9483 | affected | ||
fb265c9cb49e2074ddcdd4de99728aefdd3b3592< 76dc776153a47372719d664e0fc50d6355791abb | affected | ||
fb265c9cb49e2074ddcdd4de99728aefdd3b3592< 681ff9a09accd8a4379f8bd30b7a1641ee19bb3e | affected | ||
fb265c9cb49e2074ddcdd4de99728aefdd3b3592< e941b712e758f615d311946bf98216e79145ccd9 | affected | ||
fb265c9cb49e2074ddcdd4de99728aefdd3b3592< a95df6f04f2c37291adf26a74205cde0314d4577 | affected | ||
fb265c9cb49e2074ddcdd4de99728aefdd3b3592< b37c0edef4e66fb21a2fbc211471195a383e5ab8 | affected | ||
fb265c9cb49e2074ddcdd4de99728aefdd3b3592< 0c0b4a49d3e7f49690a6827a41faeffad5df7e21 | affected | ||
| … +15 more rows | |||
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I. Basic Information for CVE-2024-39276
Vulnerability Information
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Vulnerability Title
ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find() Syzbot reports a warning as follows: ============================================ WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290 Modules linked in: CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7 RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419 Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327 [...] ============================================ This is because when finding an entry in ext4_xattr_block_cache_find(), if ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown in the __entry_find(), won't be put away, and eventually trigger the above issue in mb_cache_destroy() due to reference count leakage. So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.
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，该漏洞源于引用计数泄漏。
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-2024-39276
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|---|
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Patches & Fixes for CVE-2024-39276 (1)
Other References for CVE-2024-39276 (7)
Same Patch Batch · Linux · 2024-06-25 · 24 CVEs total
| CVE-2024-39371 | io_uring: check for non-NULL file pointer in io_file_can_poll() | |
| 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-2024-39463 | 9p: add missing locking around taking dentry fid list | |
| CVE-2024-39462 | clk: bcm: dvp: Assign ->num before accessing ->hws | |
| CVE-2024-39461 | clk: bcm: rpi: Assign ->num before accessing ->hws | |
| CVE-2021-4440 | x86/xen: Drop USERGS_SYSRET64 paravirt call | |
| CVE-2024-39301 | net/9p: fix uninit-value in p9_client_rpc() | |
| 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-2024-38661 | 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
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