CVE-2018-7757 Denial of service in n/a

What is CVE-2018-7757?

CVE-2018-7757 is a medium-severity denial of service vulnerability in Linux kernel, published on 8 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (memory consumption) via many read accesses to files in the /sys/class/sas_phy directory, as demonstrated by the /sys/class/sas_phy/phy-1:0:12/invalid_dword_count file.

Weakness: CWE-772

Which versions are affected by CVE-2018-7757?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2018-7757?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-7757 being exploited?

There is no known exploitation of CVE-2018-7757 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2024-PN25798, DEBIAN-CVE-2018-7757, GHSA-4wjx-42q4-77fh, UBUNTU-CVE-2018-7757.