RHSA-2020:2104 — Security Advisory

Red Hat Security Advisory: kernel-alt security and bug fix update

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Severity

Important

Red Hat Product Security

RHEL 7

Products

Official CSAF product identity

Published · May 13, 2020

Updated · June 28, 2026

Topic

An update for kernel-alt is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel-alt packages provide the Linux kernel version 4.x.

Security Fix(es):

kernel: double free may be caused by the function allocate_trace_buffer in the file kernel/trace/trace.c (CVE-2017-18595)
kernel: use-after-free in __blk_add_trace in kernel/trace/blktrace.c (CVE-2019-19768)
Kernel: NetLabel: null pointer dereference while receiving CIPSO packet with null category may cause kernel panic (CVE-2020-10711)
kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c (CVE-2017-18551)
kernel: out of bounds write in i2c driver leads to local escalation of privilege (CVE-2019-9454)
kernel: denial of service in in xfs_setattr_nonsize in fs/xfs/xfs_iops.c (CVE-2019-15538)
kernel: mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c (CVE-2019-19447)
kernel: a malicious USB device in the drivers/input/ff-memless.c leads to use-after-free (CVE-2019-19524)
kernel: out-of-bounds read in set_fdc in drivers/block/floppy.c (CVE-2020-9383)
kernel: null pointer dereference in dlpar_parse_cc_property in arch/powerrc/platforms/pseries/dlpar.c causing denial of service (CVE-2019-12614)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

[7.5-alt][ext4/xfstests generic/468] fix fdatasync(2) after fallocate(2) operation (upstream fixed) [rhel-alt-7.6.z] (BZ#1554273)
[RHEL-ALT-7.6.z][arm64] CN99xx: DIMM errors not populated in EDAC sysfs (BZ#1778697)