CVE-2021-46924

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

MEDIUM

5.5

CVSS Score

Published: February 27, 2024 at 09:43 AM UTC

Updated: June 17, 2026 at 04:15 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

3.16 ≤ v < 4.14.2613.16 ≤ v < 4.19.2243.16 ≤ v < 5.10.903.16 ≤ v < 5.15.133.16 ≤ v < 5.163.16 ≤ v < 5.4.1703.16.0 ≤ v < 4.14.2614.15.0 ≤ v < 4.19.2244.20.0 ≤ v < 5.4.1705.11.0 ≤ v < 5.15.135.5.0 ≤ v < 5.10.903.1668957303f44a501af5cf37913208a2acaa6bcdf1

Vendor states this is fixed in 1b9dadba502234eea7244879b8d5d126bfaf9f0c (fixed)

Vendor states this is fixed in 1cd4063dbc91cf7965d73a6a3855e2028cd4613b (fixed)

Vendor states this is fixed in 238920381b8925d070d32d73cd9ce52ab29896fe (fixed)

Vendor states this is fixed in 38c3e320e7ff46f2dc67bc5045333e63d9f8918d (fixed)

Vendor states this is fixed in a1e0080a35a16ce3808f7040fe0c3a8fdb052349 (fixed)

Vendor states this is fixed in e553265ea56482da5700f56319fda9ff53e7dcb4 (fixed)

Vendor states this is fixed in 3.16 (unaffected)

Vendor states this is fixed in 4.14.261 (unaffected)

Vendor states this is fixed in 4.19.224 (unaffected)

Vendor states this is fixed in 5.10.90 (unaffected)

Vendor states this is fixed in 5.15.13 (unaffected)

Vendor states this is fixed in 5.16 (unaffected)