Use-after-free in Linux kernel ext4

1) Use-after-free

EUVDB-ID: #VU98877

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-49960

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the flush_work() function in fs/ext4/super.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.10 - 6.11.2

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc7:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10.3:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/9203817ba46ebba7c865c8de2aba399537b6e891
https://git.kernel.org/stable/c/fa78fb51d396f4f2f80f8e96a3b1516f394258be
https://git.kernel.org/stable/c/b85569585d0154d4db1e4f9e3e6a4731d407feb0
https://git.kernel.org/stable/c/0ce160c5bdb67081a62293028dc85758a8efb22a
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.237
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.181
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.118
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10.14
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11.3
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.55

Q & A

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.