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redhatRedHatRHSA-2020:2104
HistoryMay 12, 2020 - 12:52 p.m.

(RHSA-2020:2104) Important: kernel-alt security and bug fix update

2020-05-1212:52:19
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45

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.018 Low

EPSS

Percentile

87.9%

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)

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.018 Low

EPSS

Percentile

87.9%