RHSA-2023:5244 — Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Fixed packages 43

Release	Package	Fixed in
Red Hat · RHEL 8 enterprise_linux:8::baseos	bpftool	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	bpftool-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-abi-stablelists	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-core	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debug	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debug-core	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debug-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debug-devel	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debug-modules	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debug-modules-extra	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debuginfo-common-aarch64	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debuginfo-common-ppc64le	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debuginfo-common-s390x	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-debuginfo-common-x86_64	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-devel	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-doc	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-modules	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-modules-extra	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-tools	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-tools-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-tools-libs	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-zfcpdump	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-zfcpdump-core	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-zfcpdump-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-zfcpdump-devel	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-zfcpdump-modules	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	kernel-zfcpdump-modules-extra	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	perf	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	perf-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	python3-perf	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::baseos	python3-perf-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	bpftool-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	kernel-debug-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	kernel-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	kernel-debuginfo-common-aarch64	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	kernel-debuginfo-common-ppc64le	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	kernel-debuginfo-common-x86_64	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	kernel-tools-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	kernel-tools-libs-devel	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	perf-debuginfo	0:4.18.0-477.27.1.el8_8
Red Hat · RHEL 8 enterprise_linux:8::crb	python3-perf-debuginfo	0:4.18.0-477.27.1.el8_8

Vulnerabilities 10

High 7.8

CVE-2023-3090

Out-of-bounds write in Linux kernel's ipvlan network driver

A heap out-of-bounds write vulnerability in the Linux Kernel ipvlan network driver can be exploited to achieve local privilege escalation. The out-of-bounds write is caused by missing skb->cb initialization in the ipvlan network driver. The vulnerability is r…

Linux kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

Jun 28, 2023
High 7.8

CVE-2023-3390 Public exploit

Use-after-free in Linux kernel's netfilter subsystem

A use-after-free vulnerability was found in the Linux kernel's netfilter subsystem in net/netfilter/nf_tables_api.c. Mishandled error handling with NFT_MSG_NEWRULE makes it possible to use a dangling pointer in the same transaction causing a use-after-free vu…

Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

Jun 28, 2023
High 7.8

CVE-2023-35001 Public exploit

Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability

Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability; nft_byteorder poorly handled vm register contents when CAP_NET_ADMIN is in any user or network namespace

Linux linux_kernel linux-raspi2 linux-hwe Linux Debian Ubuntu

Jul 5, 2023
High 7.8

CVE-2023-35788 Public exploit

An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7. It allows an o…

linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux

Jun 16, 2023
High 7.8

CVE-2023-3776 Public exploit

Use-after-free in Linux kernel's net/sched: cls_fw component

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the refere…

Linux kernel linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

Jul 21, 2023
High 7.8

CVE-2023-4004

Kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()

A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their pr…

Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux

Jul 31, 2023
Medium 5.5

CVE-2023-1637

A flaw that boot CPU could be vulnerable for the speculative execution behavior kind of attacks in the Linux kernel X86…

linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu

Mar 27, 2023
Unscored —

CVE-2023-2002 Public exploit

A vulnerability was found in the HCI sockets implementation due to a missing capability check in net/bluetooth/hci_sock…

linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux

May 26, 2023
Unscored —

CVE-2023-20593 Public exploit

An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access …

AMD 2nd Gen AMD EPYC™ Processors Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne” 3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT Debian Ubuntu Alpine

Jul 24, 2023
Unscored —

CVE-2023-44466 EPSS 45%

An issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5. There is an integer signedness err…

linux-raspi2 linux-hwe linux-azure linux-riscv Debian Ubuntu Azure Linux

Sep 29, 2023

References

article
https://access.redhat.com/security/updates/classification/#important
report
https://bugzilla.redhat.com/show_bug.cgi?id=2187308
report
https://bugzilla.redhat.com/show_bug.cgi?id=2213260
report
https://bugzilla.redhat.com/show_bug.cgi?id=2215768
report
https://bugzilla.redhat.com/show_bug.cgi?id=2217845
report
https://bugzilla.redhat.com/show_bug.cgi?id=2218672
report
https://bugzilla.redhat.com/show_bug.cgi?id=2220892
report
https://bugzilla.redhat.com/show_bug.cgi?id=2225097
report
https://bugzilla.redhat.com/show_bug.cgi?id=2225275
advisory
https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_5244.json
report
https://access.redhat.com/security/cve/CVE-2023-1637
report
https://bugzilla.redhat.com/show_bug.cgi?id=2181891
advisory
https://www.cve.org/CVERecord?id=CVE-2023-1637
advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-1637
article
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e2a1256b17b16f9b9adf1b6fea56819e7b68e463
article
https://sourceware.org/bugzilla/show_bug.cgi?id=27398
report
https://access.redhat.com/security/cve/CVE-2023-2002
advisory
https://www.cve.org/CVERecord?id=CVE-2023-2002
advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-2002
article
https://www.openwall.com/lists/oss-security/2023/04/16/3
report
https://access.redhat.com/security/cve/CVE-2023-3090
advisory
https://www.cve.org/CVERecord?id=CVE-2023-3090
advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-3090
report
https://access.redhat.com/security/cve/CVE-2023-3390
advisory
https://www.cve.org/CVERecord?id=CVE-2023-3390
advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-3390
article
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1240eb93f0616b21c675416516ff3d74798fdc97
report
https://access.redhat.com/security/cve/CVE-2023-3776
advisory
https://www.cve.org/CVERecord?id=CVE-2023-3776
advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-3776
article
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0323bce598eea038714f941ce2b22541c46d488f
report
https://access.redhat.com/security/cve/CVE-2023-4004
advisory
https://www.cve.org/CVERecord?id=CVE-2023-4004
advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-4004
article
https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/
report
https://access.redhat.com/security/cve/CVE-2023-20593
advisory
https://www.cve.org/CVERecord?id=CVE-2023-20593
advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-20593
article
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=522b1d69219d8f083173819fde04f994aa051a98

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Fixed packages 43

Vulnerabilities 10

Out-of-bounds write in Linux kernel's ipvlan network driver

Use-after-free in Linux kernel's netfilter subsystem

Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability

An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7. It allows an o…

Use-after-free in Linux kernel's net/sched: cls_fw component

Kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()

A flaw that boot CPU could be vulnerable for the speculative execution behavior kind of attacks in the Linux kernel X86…

A vulnerability was found in the HCI sockets implementation due to a missing capability check in net/bluetooth/hci_sock…

An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access …

An issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5. There is an integer signedness err…

References