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CVE-2021-47042— drm/amd/display: Free local data after use

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。

AI Predicted 4.3 Difficulty: Trivial EPSS 0.21% · P10

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 3a00c04212d1cfe1426338b78f4ead623508c874< 296443139f893b554dddd56a99ba8471ab5802d4 affected
3a00c04212d1cfe1426338b78f4ead623508c874< 616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1 affected
5.12 affected
< 5.12 unaffected
5.12.4≤ 5.12.* unaffected
5.13≤ * unaffected
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I. Basic Information for CVE-2021-47042

Vulnerability Information
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Vulnerability Title
drm/amd/display: Free local data after use
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Free local data after use Fixes the following memory leak in dc_link_construct(): unreferenced object 0xffffa03e81471400 (size 1024): comm "amd_module_load", pid 2486, jiffies 4294946026 (age 10.544s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000bdf5c4a>] kmem_cache_alloc_trace+0x30a/0x4a0 [<00000000e7c59f0e>] link_create+0xce/0xac0 [amdgpu] [<000000002fb6c072>] dc_create+0x370/0x720 [amdgpu] [<000000000094d1f3>] amdgpu_dm_init+0x18e/0x17a0 [amdgpu] [<00000000bec048fd>] dm_hw_init+0x12/0x20 [amdgpu] [<00000000a2bb7cf6>] amdgpu_device_init+0x1463/0x1e60 [amdgpu] [<0000000032d3bb13>] amdgpu_driver_load_kms+0x5b/0x330 [amdgpu] [<00000000a27834f9>] amdgpu_pci_probe+0x192/0x280 [amdgpu] [<00000000fec7d291>] local_pci_probe+0x47/0xa0 [<0000000055dbbfa7>] pci_device_probe+0xe3/0x180 [<00000000815da970>] really_probe+0x1c4/0x4e0 [<00000000b4b6974b>] driver_probe_device+0x62/0x150 [<000000000f9ecc61>] device_driver_attach+0x58/0x60 [<000000000f65c843>] __driver_attach+0xd6/0x150 [<000000002f5e3683>] bus_for_each_dev+0x6a/0xc0 [<00000000a1cfc897>] driver_attach+0x1e/0x20
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 3a00c04212d1cfe1426338b78f4ead623508c874 ~ 296443139f893b554dddd56a99ba8471ab5802d4 -
Linux Linux 5.12 -

II. Public POCs for CVE-2021-47042

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III. Intelligence Information for CVE-2021-47042

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Other References for CVE-2021-47042 (2)

Same Patch Batch · Linux · 2024-02-28 · 86 CVEs total

CVE-2021-47036 9.8 CRITICAL udp: skip L4 aggregation for UDP tunnel packets
CVE-2021-46999 9.8 CRITICAL sctp: do asoc update earlier in sctp_sf_do_dupcook_a
CVE-2021-47013 9.8 CRITICAL net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
CVE-2021-47035 8.8 HIGH iommu/vt-d: Remove WO permissions on second-level paging entries
CVE-2021-47017 8.8 HIGH ath10k: Fix a use after free in ath10k_htc_send_bundle
CVE-2021-47049 8.4 HIGH Drivers: hv: vmbus: Use after free in __vmbus_open()
CVE-2021-47014 7.8 HIGH net/sched: act_ct: fix wild memory access when clearing fragments
CVE-2021-46984 7.8 HIGH kyber: fix out of bounds access when preempted
CVE-2021-46998 7.8 HIGH ethernet:enic: Fix a use after free bug in enic_hard_start_xmit
CVE-2021-47048 7.8 HIGH spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op
CVE-2021-46992 7.8 HIGH netfilter: nftables: avoid overflows in nft_hash_buckets()
CVE-2021-47012 7.8 HIGH RDMA/siw: Fix a use after free in siw_alloc_mr
CVE-2021-47011 7.8 HIGH mm: memcontrol: slab: fix obtain a reference to a freeing memcg
CVE-2021-47040 7.8 HIGH io_uring: fix overflows checks in provide buffers
CVE-2020-36787 7.8 HIGH media: aspeed: fix clock handling logic
CVE-2021-46977 7.8 HIGH KVM: VMX: Disable preemption when probing user return MSRs
CVE-2021-46993 7.8 HIGH sched: Fix out-of-bound access in uclamp
CVE-2020-36785 7.8 HIGH media: atomisp: Fix use after free in atomisp_alloc_css_stat_bufs()
CVE-2021-46983 7.5 HIGH nvmet-rdma: Fix NULL deref when SEND is completed with error
CVE-2021-47041 7.5 HIGH nvmet-tcp: fix incorrect locking in state_change sk callback

Showing top 20 of 86 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47042

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