#VU94280 Improper locking in Linux kernel - CVE-2024-40918

Vulnerability identifier: #VU94280

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: CVE-2024-40918

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the PTR_PAGE_ALIGN_DOWN(), __flush_cache_page(), flush_icache_pages(), pte_needs_flush(), flush_dcache_folio(), purge_kernel_dcache_page_asm(), copy_user_highpage(), __flush_tlb_range(), flush_cache_range(), flush_anon_page() and invalidate_kernel_vmap_range() functions in arch/parisc/kernel/cache.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/5bf196f1936bf93df31112fbdfb78c03537c07b0
https://git.kernel.org/stable/c/d66f2607d89f760cdffed88b22f309c895a2af20
https://git.kernel.org/stable/c/72d95924ee35c8cd16ef52f912483ee938a34d49

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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.