CVE-2021-46920— dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback
Affected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | bfe1d56091c1a404b3d4ce7e9809d745fc4453bb< a5ad12d5d69c63af289a37f05187a0c6fe93553d | affected |
bfe1d56091c1a404b3d4ce7e9809d745fc4453bb< 02981a44a0e402089775416371bd2e0c935685f8 | affected | ||
bfe1d56091c1a404b3d4ce7e9809d745fc4453bb< ea941ac294d75d0ace50797aebf0056f6f8f7a7f | affected | ||
5.6 | affected | ||
< 5.6 | unaffected | ||
5.10.32≤ 5.10.* | unaffected | ||
5.11.16≤ 5.11.* | unaffected | ||
5.12≤ * | unaffected |
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I. Basic Information for CVE-2021-46920
Vulnerability Information
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Vulnerability Title
dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback Current code blindly writes over the SWERR and the OVERFLOW bits. Write back the bits actually read instead so the driver avoids clobbering the OVERFLOW bit that comes after the register is read.
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，该漏洞源于写回时 SWERR 溢出位存在破坏。
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-2021-46920
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Other References for CVE-2021-46920 (3)
Same Patch Batch · Linux · 2024-02-27 · 67 CVEs total
| CVE-2021-46911 | 9.8 CRITICAL | ch_ktls: Fix kernel panic |
| CVE-2021-46955 | 8.2 HIGH | openvswitch: fix stack OOB read while fragmenting IPv4 packets |
| CVE-2021-46963 | 7.8 HIGH | scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand() |
| CVE-2021-46929 | 7.8 HIGH | sctp: use call_rcu to free endpoint |
| CVE-2021-46925 | 7.8 HIGH | net/smc: fix kernel panic caused by race of smc_sock |
| CVE-2021-46913 | 7.8 HIGH | netfilter: nftables: clone set element expression template |
| CVE-2021-46973 | 7.8 HIGH | net: qrtr: Avoid potential use after free in MHI send |
| CVE-2021-46936 | 7.8 HIGH | net: fix use-after-free in tw_timer_handler |
| CVE-2021-46958 | 7.8 HIGH | btrfs: fix race between transaction aborts and fsyncs leading to use-after-free |
| CVE-2021-46969 | 7.8 HIGH | bus: mhi: core: Fix invalid error returning in mhi_queue |
| CVE-2021-46933 | 7.8 HIGH | usb: gadget: f_fs: Clear ffs_eventfd in ffs_data_clear. |
| CVE-2021-46921 | 7.8 HIGH | locking/qrwlock: Fix ordering in queued_write_lock_slowpath() |
| CVE-2021-46922 | 7.8 HIGH | KEYS: trusted: Fix TPM reservation for seal/unseal |
| CVE-2021-46967 | 7.8 HIGH | vhost-vdpa: fix vm_flags for virtqueue doorbell mapping |
| CVE-2021-46948 | 7.5 HIGH | sfc: farch: fix TX queue lookup in TX event handling |
| CVE-2021-46960 | 7.5 HIGH | cifs: Return correct error code from smb2_get_enc_key |
| CVE-2021-46912 | 7.3 HIGH | net: Make tcp_allowed_congestion_control readonly in non-init netns |
| CVE-2021-46908 | 7.1 HIGH | bpf: Use correct permission flag for mixed signed bounds arithmetic |
| CVE-2021-46974 | 7.1 HIGH | bpf: Fix masking negation logic upon negative dst register |
| CVE-2021-46910 | 7.0 HIGH | ARM: 9063/1: mm: reduce maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled |
Showing top 20 of 67 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-68454
KVM: s390: pci: Fix handling of AIF enable without AISB - CVE-2026-68453
s390/zcrypt: Fix buffer over-read in cca_cipher2protkey - CVE-2026-68452
s390/zcrypt: Validate length for CCA AES cipher key requests - CVE-2026-68451
s390/zcrypt: Validate length for CCA ECC private key request - CVE-2026-68450
btrfs: free mapping node on duplicate reloc root insert
Same vendor: Linux
- CVE-2026-68454
KVM: s390: pci: Fix handling of AIF enable without AISB - CVE-2026-68453
s390/zcrypt: Fix buffer over-read in cca_cipher2protkey - CVE-2026-68452
s390/zcrypt: Validate length for CCA AES cipher key requests - CVE-2026-68451
s390/zcrypt: Validate length for CCA ECC private key request - CVE-2026-68450
btrfs: free mapping node on duplicate reloc root insert
V. Comments for CVE-2021-46920
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