CVE-2021-46924
NFC: st21nfca: Fix memory leak in device probe and remove
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: NFC: st21nfca: corrige la pérdida de memoria en la sonda del dispositivo y elimina 'phy->pending_skb' cuando se asigna la sonda del dispositivo, pero olvidó liberarla en la ruta de manejo de errores y eliminar la ruta, esto causa pérdida de memoria de la siguiente manera: objeto sin referencia 0xffff88800bc06800 (tamaño 512): comunicación "8", pid 11775, santiago 4295159829 (edad 9.032 s) volcado hexadecimal (primeros 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 Solucionarlo liberando 'pending_skb' por error y elimínelo.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-25 CVE Reserved
- 2024-02-27 CVE Published
- 2024-04-21 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-401: Missing Release of Memory after Effective Lifetime
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/68957303f44a501af5cf37913208a2acaa6bcdf1 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.16 < 4.14.261 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 4.14.261" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.16 < 4.19.224 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 4.19.224" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.16 < 5.4.170 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.4.170" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.16 < 5.10.90 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.10.90" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.16 < 5.15.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.15.13" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.16 < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.16" | en |
Affected
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