SB2019111822 - Memory leak in Linux kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2019-19076)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the nfp_abm_u32_knode_replace() function in drivers/net/ethernet/netronome/nfp/abm/cls.c in the Linux kernel before 5.3.6 allows attackers to cause a denial of service (memory consumption), aka CID-78beef629fd9. NOTE: This has been argued as not a valid vulnerability. The upstream commit 78beef629fd9 was reverted. A remote attacker can perform a denial of service attack.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.22
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.6
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6