// For flags

CVE-2024-26955

nilfs2: prevent kernel bug at submit_bh_wbc()

Severity Score

"-"
*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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

nilfs2: prevent kernel bug at submit_bh_wbc()

Fix a bug where nilfs_get_block() returns a successful status when
searching and inserting the specified block both fail inconsistently. If
this inconsistent behavior is not due to a previously fixed bug, then an
unexpected race is occurring, so return a temporary error -EAGAIN instead.

This prevents callers such as __block_write_begin_int() from requesting a
read into a buffer that is not mapped, which would cause the BUG_ON check
for the BH_Mapped flag in submit_bh_wbc() to fail.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: nilfs2: previene el error del kernel en submit_bh_wbc(). Se corrige un error por el cual nilfs_get_block() devuelve un estado exitoso cuando la búsqueda y la inserción del bloque especificado fallan de manera inconsistente. Si este comportamiento inconsistente no se debe a un error solucionado previamente, entonces se está produciendo una ejecución inesperada, por lo que se devuelve un error temporal -EAGAIN. Esto evita que llamadores como __block_write_begin_int() soliciten una lectura en un búfer que no está asignado, lo que provocaría que falle la verificación BUG_ON del indicador BH_Mapped en submit_bh_wbc().

*Credits: N/A
CVSS Scores
Attack Vector
-
Attack Complexity
-
Privileges Required
-
User Interaction
-
Scope
-
Confidentiality
-
Integrity
-
Availability
-
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-19 CVE Reserved
  • 2024-05-01 CVE Published
  • 2024-05-01 EPSS Updated
  • 2024-12-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
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"
>= 2.6.30 < 4.19.312
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 4.19.312"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 2.6.30 < 5.4.274
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 5.4.274"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 2.6.30 < 5.10.215
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 5.10.215"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 2.6.30 < 5.15.154
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 5.15.154"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 2.6.30 < 6.1.84
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 6.1.84"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 2.6.30 < 6.6.24
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 6.6.24"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 2.6.30 < 6.7.12
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 6.7.12"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 2.6.30 < 6.8.3
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 6.8.3"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 2.6.30 < 6.9
Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 6.9"
en
Affected