Vulnerability identifier: #VU11524
Vulnerability risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-125
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists due to improper validation of bitmap block numbers by the balloc.c and ialloc.c source codes. A local attacker can mount a customized ext4 image, trigger out-of-bounds read in the ext4/balloc.c:ext4_valid_block_bitmap() function ans cause the service to crash.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 4.0.1 - 4.0.6, 4.1 - 4.15.15, 4.2 - 4.2.6, 4.3 - 4.3.6, 4.4.0 - 4.4.111, 4.5 - 4.5.4, 4.6 rc1 - 4.6.3, 4.7 - 4.7.9, 4.8 - 4.8.12, 4.9 - 4.9.76
External links
https://bugzilla.kernel.org/show_bug.cgi?id=199181
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.