CVE-2021-47305— dma-buf/sync_file: Don't leak fences on merge failure
Affected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | a02b9dc90d844cc7df7b63264e7920cc425052d9< 19f51c2529339280d2c8c6427cd3e21ddf1ac3f8 | affected |
a02b9dc90d844cc7df7b63264e7920cc425052d9< e0355a0ad31a1d677b2a4514206de4902bd550e8 | affected | ||
a02b9dc90d844cc7df7b63264e7920cc425052d9< 41f45e91c92c8480242ea448d54e28c753b13902 | affected | ||
a02b9dc90d844cc7df7b63264e7920cc425052d9< 0d514185ae792d3a1903c8e1a83899aa996705ce | affected | ||
a02b9dc90d844cc7df7b63264e7920cc425052d9< 19edcd97727aae9362444a859a24d99a8730cb27 | affected | ||
a02b9dc90d844cc7df7b63264e7920cc425052d9< ffe000217c5068c5da07ccb1c0f8cce7ad767435 | affected | ||
4.9 | affected | ||
< 4.9 | unaffected | ||
| … +6 more rows | |||
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I. Basic Information for CVE-2021-47305
Vulnerability Information
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Vulnerability Title
dma-buf/sync_file: Don't leak fences on merge failure
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dma-buf/sync_file: Don't leak fences on merge failure Each add_fence() call does a dma_fence_get() on the relevant fence. In the error path, we weren't calling dma_fence_put() so all those fences got leaked. Also, in the krealloc_array failure case, we weren't freeing the fences array. Instead, ensure that i and fences are always zero-initialized and dma_fence_put() all the fences and kfree(fences) on every error path.
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。攻击者利用该漏洞会导致部分信息泄露。
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-2021-47305
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-47305 (5)
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
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-2021-47305
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