CVE-2024-26926

binder: check offset alignment in binder_get_object()

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

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

binder: check offset alignment in binder_get_object()

Commit 6d98eb95b450 ("binder: avoid potential data leakage when copying
txn") introduced changes to how binder objects are copied. In doing so,
it unintentionally removed an offset alignment check done through calls
to binder_alloc_copy_from_buffer() -> check_buffer().

These calls were replaced in binder_get_object() with copy_from_user(),
so now an explicit offset alignment check is needed here. This avoids
later complications when unwinding the objects gets harder.

It is worth noting this check existed prior to commit 7a67a39320df
("binder: add function to copy binder object from buffer"), likely
removed due to redundancy at the time.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: Binder: verifique la alineación de desplazamiento en binder_get_object() El commit 6d98eb95b450 ("binder: evite posibles fugas de datos al copiar txn") introdujo cambios en la forma en que se copian los objetos de Binder. Al hacerlo, eliminó involuntariamente una verificación de alineación de desplazamiento realizada mediante llamadas a binder_alloc_copy_from_buffer() -> check_buffer(). Estas llamadas fueron reemplazadas en binder_get_object() con copy_from_user(), por lo que ahora se necesita aquí una verificación explícita de alineación de desplazamiento. Esto evita complicaciones posteriores cuando el desenrollado de los objetos se vuelve más difícil. Vale la pena señalar que esta verificación existía antes de el commit 7a67a39320df ("carpeta: agregar función para copiar el objeto de carpeta del búfer"), probablemente eliminada debido a la redundancia en ese momento.

*Credits: N/A

CVSS Scores

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Privileges Required

User Interaction

Scope

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Integrity

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* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2024-02-19 CVE Reserved
2024-04-24 CVE Published
2024-05-03 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (13)

URL	Tag	Source
https://git.kernel.org/stable/c/c056a6ba35e00ae943e377eb09abd77a6915b31a	Vuln. Introduced
https://git.kernel.org/stable/c/23e9d815fad84c1bee3742a8de4bd39510435362	Vuln. Introduced
https://git.kernel.org/stable/c/7a9ad4aceb0226b391c9d3b8e4ac2e7d438b6bde	Vuln. Introduced
https://git.kernel.org/stable/c/6d98eb95b450a75adb4516a1d33652dc78d2b20c	Vuln. Introduced
https://git.kernel.org/stable/c/66e12f5b3a9733f941893a00753b10498724607d	Vuln. Introduced
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/68a28f551e4690db2b27b3db716c7395f6fada12	2024-05-02
https://git.kernel.org/stable/c/48a1f83ca9c68518b1a783c62e6a8223144fa9fc	2024-05-02
https://git.kernel.org/stable/c/a2fd6dbc98be1105a1d8e9e31575da8873ef115c	2024-04-27
https://git.kernel.org/stable/c/a6d2a8b211c874971ee4cf3ddd167408177f6e76	2024-04-27
https://git.kernel.org/stable/c/1d7f1049035b2060342f11eff957cf567d810bdc	2024-04-27
https://git.kernel.org/stable/c/f01d6619045704d78613b14e2e0420bfdb7f1c15	2024-04-27
https://git.kernel.org/stable/c/aaef73821a3b0194a01bd23ca77774f704a04d40	2024-04-11

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"				>= 5.4.226 < 5.4.275 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4.226 < 5.4.275"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.10.157 < 5.10.216 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.157 < 5.10.216"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.15.17 < 5.15.157 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.17 < 5.15.157"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.17 < 6.1.88 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.17 < 6.1.88"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.17 < 6.6.29 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.17 < 6.6.29"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.17 < 6.8.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.17 < 6.8.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.17 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.17 < 6.9"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.16.3 Search vendor "Linux" for product "Linux Kernel" and version "5.16.3"		en		Affected