5.5

CVE-2021-46924

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.16.0 < 4.14.261
Linux ≫ Linux Kernel Version >= 4.15.0 < 4.19.224
Linux ≫ Linux Kernel Version >= 4.20.0 < 5.4.170
Linux ≫ Linux Kernel Version >= 5.5.0 < 5.10.90
Linux ≫ Linux Kernel Version >= 5.11.0 < 5.15.13
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.13
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c
Patch
https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b
Patch
https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe
Patch
https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d
Patch
https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349
Patch
https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4
Patch