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redhatRedHatRHSA-2021:0856
HistoryMar 16, 2021 - 10:26 a.m.

(RHSA-2021:0856) Important: kernel security and bug fix update

2021-03-1610:26:23
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406

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.011 Low

EPSS

Percentile

84.0%

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

  • kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)

  • kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)

  • kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)

  • kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)

  • kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)

  • kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)

  • kernel: performance counters race condition use-after-free (CVE-2020-14351)

  • kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)

  • kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)

  • kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)

  • kernel: increase slab leak leads to DoS (CVE-2021-20265)

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):

  • BUG: scheduling while atomic: memory allocation under spinlock in scsi_register_device_handler() (BZ#1619147)

  • WARNING in __iscsit_free_cmd during recovery Abort (BZ#1784540)

  • lpfc does not issue adisc to fcp-2 devices, does not respond to nvme targer that send an adisc. (BZ#1875961)

  • Panic in semctl_nolock.constprop.15+0x25b (BZ#1877264)

  • [RHEL 7.7][md]Crash due to invalid pool workqueue pointer, work queue race (BZ#1889372)

  • Guest crash on intel CPU with -cpu host,-spec-ctrl,+ibpb (BZ#1890669)

  • RHEL7.9 - kernel/uv: handle length extension properly (BZ#1899172)

  • Commit b144f013fc16a06d7a4b9a4be668a3583fafeda2 ‘i40e: don’t report link up for a VF who hasn’t enabled queues’ introducing issues with VM using DPDK (BZ#1901064)

  • writing to /sys/devices/(…)/net/eno49/queues/tx-16/xps_cpus triggers kernel panic (BZ#1903819)

  • [Hyper-V][RHEL-7.9]video: hyperv_fb: Fix the cache type when mapping the VRAM Edit (BZ#1908896)

  • kvm-rhel7.9 [AMD] - system crash observed while powering on virtual machine with attached VF interfaces. (BZ#1909036)

  • kernel: nvme nvme7: Connect command failed, error wo/DNR bit: 2 (BZ#1910817)

  • dm-mirror crashes from assuming underlying storage will have a non-NULL merge_bvec_fn (BZ#1916407)

  • watchdog: use nmi registers snapshot in hardlockup handler (BZ#1916589)

  • [DELL EMC 7.9 BUG] - Intel E810 NIC interfaces are not functional in RHEL 7.9 on system with AMD Rome CPUs (BZ#1918273)

  • [DELL EMC BUG] RHEL system log shows AMD-Vi error when system connected with Gen 4 NVMe drives. (BZ#1921187)

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.011 Low

EPSS

Percentile

84.0%