Riskcovery

CVE-2021-46924

NFC: st21nfca: Fix memory leak in device probe and remove

State
Published
Severity
Not scored
Published
Feb 27, 2024
Updated
May 11, 2026
Reserved
Feb 25, 2024

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

NFC: st21nfca: Fix memory leak in device probe and remove

'phy->pending_skb' is alloced when device probe, but forgot to free in the error handling path and remove path, this cause memory leak as follows:

unreferenced object 0xffff88800bc06800 (size 512): comm "8", pid 11775, jiffies 4295159829 (age 9.032s) 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: [<00000000d66c09ce>] __kmalloc_node_track_caller+0x1ed/0x450 [<00000000c93382b3>] kmalloc_reserve+0x37/0xd0 [<000000005fea522c>] __alloc_skb+0x124/0x380 [<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2

Fix it by freeing 'pending_skb' in error and remove.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 68957303f44a501af5cf37913208a2acaa6bcdf1 to before 38c3e320e7ff46f2dc67bc5045333e63d9f8918dAffected
  • 68957303f44a501af5cf37913208a2acaa6bcdf1 to before a1e0080a35a16ce3808f7040fe0c3a8fdb052349Affected
  • 68957303f44a501af5cf37913208a2acaa6bcdf1 to before 1cd4063dbc91cf7965d73a6a3855e2028cd4613bAffected
  • 68957303f44a501af5cf37913208a2acaa6bcdf1 to before e553265ea56482da5700f56319fda9ff53e7dcb4Affected
  • 68957303f44a501af5cf37913208a2acaa6bcdf1 to before 238920381b8925d070d32d73cd9ce52ab29896feAffected
  • 68957303f44a501af5cf37913208a2acaa6bcdf1 to before 1b9dadba502234eea7244879b8d5d126bfaf9f0cAffected
LinuxLinux
  • 3.16Affected
  • before 3.16Not affected
  • 4.14.261 through 4.14.*Not affected
  • 4.19.224 through 4.19.*Not affected
  • 5.4.170 through 5.4.*Not affected
  • 5.10.90 through 5.10.*Not affected
  • 5.15.13 through 5.15.*Not affected
  • 5.16 and laterNot affected

References

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