CVE-2021-47254— gfs2: Fix use-after-free in gfs2_glock_shrink_scan
Affected Version Matrix 26
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 6948c6bc17d666663a84c124b3176039e64a58f4< 38ce329534500bf4ae71f81df6a37a406cf187b4 | affected |
b568ed385a18c0ddbe41862b69088b636550a04f< 92869945cc5b78ee8a1ef90336fe070893e3458a | affected | ||
762bb3528249604bc680a9df635e8995740176de< 0364742decb0f02bc183404868b82896f7992595 | affected | ||
bac8520892812dada1ac93f27d96317470d24b1f< 094bf5670e762afa243d2c41a5c4ab71c7447bf4 | affected | ||
7881ef3f33bb80f459ea6020d1e021fc524a6348< 86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d | affected | ||
7881ef3f33bb80f459ea6020d1e021fc524a6348< a61156314b66456ab6a291ed5deba1ebd002ab3c | affected | ||
7881ef3f33bb80f459ea6020d1e021fc524a6348< e87ef30fe73e7e10d2c85bdcc778dcec24dca553 | affected | ||
7881ef3f33bb80f459ea6020d1e021fc524a6348< 1ab19c5de4c537ec0d9b21020395a5b5a6c059b2 | affected | ||
| … +18 more rows | |||
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I. Basic Information for CVE-2021-47254
Vulnerability Information
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Vulnerability Title
gfs2: Fix use-after-free in gfs2_glock_shrink_scan
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix use-after-free in gfs2_glock_shrink_scan The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to remove the glock from the lru list in __gfs2_glock_put(). On the shrink scan path, the same flag is cleared under lru_lock but because of cond_resched_lock(&lru_lock) in gfs2_dispose_glock_lru(), progress on the put side can be made without deleting the glock from the lru list. Keep GLF_LRU across the race window opened by cond_resched_lock(&lru_lock) to ensure correct behavior on both sides - clear GLF_LRU after list_del under lru_lock.
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-2021-47254
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-47254 (7)
Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total
| CVE-2021-47432 | lib/generic-radix-tree.c: Don't overflow in peek() | |
| CVE-2023-52760 | gfs2: Fix slab-use-after-free in gfs2_qd_dealloc | |
| CVE-2023-52757 | smb: client: fix potential deadlock when releasing mids | |
| CVE-2023-52755 | ksmbd: fix slab out of bounds write in smb_inherit_dacl() | |
| CVE-2023-52754 | media: imon: fix access to invalid resource for the second interface | |
| CVE-2023-52753 | drm/amd/display: Avoid NULL dereference of timing generator | |
| CVE-2023-52752 | smb: client: fix use-after-free bug in cifs_debug_data_proc_show() | |
| CVE-2023-52751 | smb: client: fix use-after-free in smb2_query_info_compound() | |
| CVE-2023-52750 | arm64: Restrict CPU_BIG_ENDIAN to GNU as or LLVM IAS 15.x or newer | |
| CVE-2023-52749 | spi: Fix null dereference on suspend | |
| CVE-2023-52748 | f2fs: avoid format-overflow warning | |
| CVE-2022-48710 | drm/radeon: fix a possible null pointer dereference | |
| CVE-2023-52742 | net: USB: Fix wrong-direction WARNING in plusb.c | |
| CVE-2023-52738 | drm/amdgpu/fence: Fix oops due to non-matching drm_sched init/fini | |
| CVE-2023-52740 | powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch | |
| CVE-2023-52739 | Fix page corruption caused by racy check in __free_pages | |
| CVE-2023-52741 | cifs: Fix use-after-free in rdata->read_into_pages() | |
| CVE-2023-52743 | ice: Do not use WQ_MEM_RECLAIM flag for workqueue | |
| CVE-2023-52746 | xfrm/compat: prevent potential spectre v1 gadget in xfrm_xlate32_attr() | |
| CVE-2023-52747 | IB/hfi1: Restore allocated resources on failed copyout |
Showing top 20 of 361 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2021-47254
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