CVE-2021-47455
ptp: Fix possible memory leak in ptp_clock_register()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
ptp: Fix possible memory leak in ptp_clock_register()
I got memory leak as follows when doing fault injection test:
unreferenced object 0xffff88800906c618 (size 8):
comm "i2c-idt82p33931", pid 4421, jiffies 4294948083 (age 13.188s)
hex dump (first 8 bytes):
70 74 70 30 00 00 00 00 ptp0....
backtrace:
[<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0
[<0000000079f6e2ff>] kvasprintf+0xb5/0x150
[<0000000026aae54f>] kvasprintf_const+0x60/0x190
[<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150
[<000000004e35abdd>] dev_set_name+0xc0/0x100
[<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp]
[<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]
When posix_clock_register() returns an error, the name allocated
in dev_set_name() will be leaked, the put_device() should be used
to give up the device reference, then the name will be freed in
kobject_cleanup() and other memory will be freed in ptp_clock_release().
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ptp: solucione una posible pérdida de memoria en ptp_clock_register() Obtuve una pérdida de memoria de la siguiente manera al realizar la prueba de inyección de fallas: objeto sin referencia 0xffff88800906c618 (tamaño 8): comm "i2c-idt82p33931", pid 4421, jiffies 4294948083 (edad 13,188 s) volcado hexadecimal (primeros 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0 [<0000 000079f6e2ff>] kvasprintf+0xb5 /0x150 [<0000000026aae54f>] kvasprintf_const+0x60/0x190 [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150 [<000000004e35abdd>] dev_set_name+0xc0/0x100 0000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp] [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] Cuando posix_clock_register() devuelve un error, el nombre asignado en dev_set_name() se filtrará, se debe usar put_device() para renunciar a la referencia del dispositivo, luego el nombre se liberará kobject_cleanup() y otra memoria se liberarán en ptp_clock_release().
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-21 CVE Reserved
- 2024-05-22 CVE Published
- 2024-05-22 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (11)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/a33121e5487b424339636b25c35d3a180eaa5f5e | Vuln. Introduced | |
| https://git.kernel.org/stable/c/5230ef61882d2d14deb846eb6b48370694816e4c | Vuln. Introduced | |
| https://git.kernel.org/stable/c/6f5e3bb7879ee1eb71c6c3cbaaffbb0da6cd7d57 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/89e8fc989feaac00bf1a7f9a766289422e2f5768 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/2dece4d6d13fe179ee3a5991811712725a56e2f7 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/0393b8720128d5b39db8523e5bfbfc689f18c37c | Vuln. Introduced | |
| https://git.kernel.org/stable/c/bfa2e0cd3dfda64fde43c3dca3aeba298d2fe7ad | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8 | 2021-10-27 | |
| https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0 | 2021-10-20 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-47455 | 2024-09-24 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2282903 | 2024-09-24 |
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" | >= 5.5 < 5.14.15 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.14.15" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.5 < 5.15 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.15" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 3.16.83 Search vendor "Linux" for product "Linux Kernel" and version "3.16.83" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.4.224 Search vendor "Linux" for product "Linux Kernel" and version "4.4.224" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.9.224 Search vendor "Linux" for product "Linux Kernel" and version "4.9.224" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.14.162 Search vendor "Linux" for product "Linux Kernel" and version "4.14.162" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.19.93 Search vendor "Linux" for product "Linux Kernel" and version "4.19.93" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.4.8 Search vendor "Linux" for product "Linux Kernel" and version "5.4.8" | en |
Affected
| ||||||