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CVE-2021-46950— md/raid1: properly indicate failure when ending a failed write request

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，该漏洞源于结束失败的写入请求时正确指示失败。

AI Predicted 4.4 Difficulty: Theoretical EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1486 · Data Encrypted for Impact

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux 900c531899f5ee2321bef79e20055787bc73251d< 12216d0919b64ee2ea5dc7a50e455670f44383d5 affected
1cd972e0a10760a1fa27d9830d78446c891c23b6< a6e17cab00fc5bf85472434c52ac751426257c6f affected
eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad< 6920cef604fa57f9409e3960413e9cc11f5c5a40 affected
eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad< 661061a45e32d8b2cc0e306da9f169ad44011382 affected
eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad< 59452e551784b7a57a45d971727e9db63b192515 affected
eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad< 538244fba59fde17186322776247cd9c05be86dd affected
eeba6809d8d58908b5ed1b5ceb5fcb09a98a7cad< 2417b9869b81882ab90fd5ed1081a1cb2d4db1dd affected
a1f4fcb880988a96c0b2d5c3305ffc4e49eca0ed affected
… +14 more rows
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I. Basic Information for CVE-2021-46950

Vulnerability Information
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Vulnerability Title
md/raid1: properly indicate failure when ending a failed write request
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: md/raid1: properly indicate failure when ending a failed write request This patch addresses a data corruption bug in raid1 arrays using bitmaps. Without this fix, the bitmap bits for the failed I/O end up being cleared. Since we are in the failure leg of raid1_end_write_request, the request either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded).
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，该漏洞源于结束失败的写入请求时正确指示失败。
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 900c531899f5ee2321bef79e20055787bc73251d ~ 12216d0919b64ee2ea5dc7a50e455670f44383d5 -
Linux Linux 5.4 -

II. Public POCs for CVE-2021-46950

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III. Intelligence Information for CVE-2021-46950

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Other References for CVE-2021-46950 (7)

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-2021-46925 7.8 HIGH net/smc: fix kernel panic caused by race of smc_sock
CVE-2021-46929 7.8 HIGH sctp: use call_rcu to free endpoint
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-2021-46933 7.8 HIGH usb: gadget: f_fs: Clear ffs_eventfd in ffs_data_clear.
CVE-2021-46969 7.8 HIGH bus: mhi: core: Fix invalid error returning in mhi_queue
CVE-2021-46958 7.8 HIGH btrfs: fix race between transaction aborts and fsyncs leading to use-after-free
CVE-2021-46967 7.8 HIGH vhost-vdpa: fix vm_flags for virtqueue doorbell mapping
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-2021-46948 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 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-46950

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