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TI-2021-21707 Aliases CVE-2021-47042GHSA-v368-7gcx-f4wj

drm/amd/display: Free local data after use

Priority LOW 24CWE-401Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-401.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00205 10th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.12.4, 5.13Red 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
LinuxLinux5.12 and later5.12.4, 5.13Patch availableCNA
  • Linux VendorLinux Affected 5.12 and later Fixed in 5.12.4, 5.13 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.12 to before 5.12.4VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.12 to before 5.12.4 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.12.4, 5.13

Vendor assessments

Red Hat

Red Hat rating: Low. 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-2021-47042
  2. 2026-10-03 Alias added: GHSA-v368-7gcx-f4wj

References

Patch 2

  • 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