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CVE-2021-47003— dmaengine: idxd: Fix potential null dereference on pointer status

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，该漏洞源于存在空指针取消引用。

AI Predicted 3.5 Difficulty: Moderate EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux 40e3b5c128645d2ddad12310c7be98758cafb2b0< 5756f757c72501ef1a16f5f63f940623044180e9 affected
89e3becd8f821e507052e012d2559dcda59f538e< 2280b4cc29d8cdd2be3d1b2d1ea4f958e2131c97 affected
89e3becd8f821e507052e012d2559dcda59f538e< 7bc402f843e7817a4a808e7b9ab0bcd7ffd55bfa affected
89e3becd8f821e507052e012d2559dcda59f538e< 28ac8e03c43dfc6a703aa420d18222540b801120 affected
5.10.17< 5.10.38 affected
5.11 affected
< 5.11 unaffected
5.10.38≤ 5.10.* unaffected
… +3 more rows
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I. Basic Information for CVE-2021-47003

Vulnerability Information
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Vulnerability Title
dmaengine: idxd: Fix potential null dereference on pointer status
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix potential null dereference on pointer status There are calls to idxd_cmd_exec that pass a null status pointer however a recent commit has added an assignment to *status that can end up with a null pointer dereference. The function expects a null status pointer sometimes as there is a later assignment to *status where status is first null checked. Fix the issue by null checking status before making the assignment. Addresses-Coverity: ("Explicit null dereferenced")
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，该漏洞源于存在空指针取消引用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 40e3b5c128645d2ddad12310c7be98758cafb2b0 ~ 5756f757c72501ef1a16f5f63f940623044180e9 -
Linux Linux 5.11 -

II. Public POCs for CVE-2021-47003

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III. Intelligence Information for CVE-2021-47003

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Other References for CVE-2021-47003 (4)

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-2021-46992 7.8 HIGH netfilter: nftables: avoid overflows in nft_hash_buckets()
CVE-2021-47014 7.8 HIGH net/sched: act_ct: fix wild memory access when clearing fragments
CVE-2020-36787 7.8 HIGH media: aspeed: fix clock handling logic
CVE-2021-47048 7.8 HIGH spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op
CVE-2021-46998 7.8 HIGH ethernet:enic: Fix a use after free bug in enic_hard_start_xmit
CVE-2021-46984 7.8 HIGH kyber: fix out of bounds access when preempted
CVE-2021-46993 7.8 HIGH sched: Fix out-of-bound access in uclamp
CVE-2021-47040 7.8 HIGH io_uring: fix overflows checks in provide buffers
CVE-2020-36785 7.8 HIGH media: atomisp: Fix use after free in atomisp_alloc_css_stat_bufs()
CVE-2021-46977 7.8 HIGH KVM: VMX: Disable preemption when probing user return MSRs
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-2021-47001 7.5 HIGH xprtrdma: Fix cwnd update ordering
CVE-2021-46983 7.5 HIGH nvmet-rdma: Fix NULL deref when SEND is completed with error

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-2021-47003

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