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Oracle Linux: CVE-2019-20812: ELSA-2020-5841: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2019-20812: ELSA-2020-5841: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:L/Au:M/C:N/I:N/A:C)
Published
12/09/2019
Created
09/15/2020
Added
09/11/2020
Modified
12/06/2024

Description

An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067. A flaw was found in the way the af_packet functionality in the Linux kernel handled the retirement timer setting for TPACKET_v3 when getting settings from the underlying network device errors out. This flaw allows a local user who can open the af_packet domain socket and who can hit the error path, to use this vulnerability to starve the system.

Solution(s)

  • oracle-linux-upgrade-kernel-uek

References

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