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TI-2021-21616 Aliases CVE-2021-46950GHSA-fvxf-3hr7-h5gc

md/raid1: properly indicate failure when ending a failed write request

Priority LOW 34Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00248 16th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.14.233, 4.19.191, 5.3 +6Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.14.147 to before 4.14.233; 4.19.77 to before 4.19.191; 5.2.19 to before 5.3; 5.3.4 to before 5.44.14.233, 4.19.191, 5.3, 5.4Patch availableCNA
LinuxLinux5.4 and later4.14.233, 4.19.191, 5.4.118, 5.10.36, 5.11.20, 5.12.3, 5.13Patch availableCNA
  • Linux VendorLinux Affected 4.14.147 to before 4.14.233; 4.19.77 to before 4.19.191; 5.2.19 to before 5.3; 5.3.4 to before 5.4 Fixed in 4.14.233, 4.19.191, 5.3, 5.4 Patch available CNA
  • Linux VendorLinux Affected 5.4 and later Fixed in 4.14.233, 4.19.191, 5.4.118, 5.10.36, 5.11.20, 5.12.3, 5.13 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.14.147 to before 4.14.233; 4.19.77 to before 4.19.191; 5.2.19 to before 5.3; 5.3.4 to before 5.4.118; 5.5 to before 5.10.36; 5.11 to before 5.11.20; 5.12 to before 5.12.3VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14.147 to before 4.14.233; 4.19.77 to before 4.19.191; 5.2.19 to before 5.3; 5.3.4 to before 5.4.118; 5.5 to before 5.10.36; 5.11 to before 5.11.20; 5.12 to before 5.12.3 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.14.233, 4.19.191, 5.3, 5.4
  • Fix · CNA Linux (Linux) Fixed in 4.14.233, 4.19.191, 5.4.118, 5.10.36, 5.11.20, 5.12.3, 5.13

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Not affected: 2 products
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-46950
  2. 2026-10-03 Alias added: GHSA-fvxf-3hr7-h5gc

References

Patch 7

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences