SUSE: 2023:4030-1 important: the Linux Kernel
Summary
## The SUSE Linux Enterprise 15 SP2 kernel was updated to receive various security bugfixes. The following security bugs were fixed: * CVE-2023-4389: Fixed a reference counting issue in the Btrfs filesystem that could be exploited in order to leak internal kernel information or crash the system (bsc#1214351). * CVE-2023-42753: Fixed an array indexing vulnerability in the netfilter subsystem. This issue may have allowed a local user to crash the system or potentially escalate their privileges (bsc#1215150). * CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table which could be exploited by network adjacent attackers, increasing CPU usage by 95% (bsc#1212703). * CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network scheduler which could be exploited to achieve local privilege escalatio (bsc#1215275). * CVE-2023-23454: Fixed a type-confusion in the CBQ network scheduler (bsc#1207036). * CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215117). * CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115). * CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299). * CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169). * CVE-2023-2177: Fixed a null pointer dereference issue in the sctp network protocol which could allow a user to crash the system (bsc#1210643). * CVE-2023-4881: Fixed an out-of-bounds write flaw in the netfilter subsystem that could lead to information disclosure or denial of service (bsc#1215221). * CVE-2023-40283: Fixed a use-after-free issue in the Bluetooth subsystem (bsc#1214233). * CVE-2023-1192: Fixed a use-after-free in the CIFS subsystem (bsc#1208995). The following non-security bugs were fixed: * check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380). * mkspec: Allow unsupported KMPs (bsc#1214386) * rpm/mkspec-dtb: support for nested subdirs. * x86/srso: Do not probe microcode in a guest (git-fixes). * x86/srso: Fix SBPB enablement for spec_rstack_overflow=off (git-fixes). * x86/srso: Fix srso_show_state() side effect (git-fixes). * x86/srso: Set CPUID feature bits independently of bug or mitigation status (git-fixes).
References
* #1207036
* #1208995
* #1210169
* #1210643
* #1212703
* #1214233
* #1214351
* #1214380
* #1214386
* #1215115
* #1215117
* #1215150
* #1215221
* #1215275
* #1215299
Cross-
* CVE-2020-36766
* CVE-2023-1192
* CVE-2023-1206
* CVE-2023-1859
* CVE-2023-2177
* CVE-2023-23454
* CVE-2023-40283
* CVE-2023-42753
* CVE-2023-4389
* CVE-2023-4622
* CVE-2023-4623
* CVE-2023-4881
* CVE-2023-4921
CVSS scores:
* CVE-2020-36766 ( SUSE ): 2.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
* CVE-2020-36766 ( NVD ): 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
* CVE-2023-1192 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2023-1206 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2023-1206 ( NVD ): 5.7 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2023-1859 ( SUSE ): 1.9 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
* CVE-2023-1859 ( NVD ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2023-2177 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2023-2177 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2023-23454 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-23454 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2023-40283 ( SUSE ): 5.7 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
* CVE-2023-40283 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-42753 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-4389 ( SUSE ): 5.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
* CVE-2023-4389 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-4622 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-4622 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-4623 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-4623 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-4881 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
* CVE-2023-4881 ( NVD ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
* CVE-2023-4921 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2023-4921 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products:
* SUSE Linux Enterprise High Availability Extension 15 SP2
* SUSE Linux Enterprise High Performance Computing 15 SP2
* SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS 15-SP2
* SUSE Linux Enterprise Live Patching 15-SP2
* SUSE Linux Enterprise Server 15 SP2
* SUSE Linux Enterprise Server 15 SP2 Business Critical Linux 15-SP2
* SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2
* SUSE Linux Enterprise Server for SAP Applications 15 SP2
* SUSE Manager Proxy 4.1
* SUSE Manager Retail Branch Server 4.1
* SUSE Manager Server 4.1
An update that solves 13 vulnerabilities and has two security fixes can now be
installed.
##
* https://www.suse.com/security/cve/CVE-2020-36766.html
* https://www.suse.com/security/cve/CVE-2023-1192.html
* https://www.suse.com/security/cve/CVE-2023-1206.html
* https://www.suse.com/security/cve/CVE-2023-1859.html
* https://www.suse.com/security/cve/CVE-2023-2177.html
* https://www.suse.com/security/cve/CVE-2023-23454.html
* https://www.suse.com/security/cve/CVE-2023-40283.html
* https://www.suse.com/security/cve/CVE-2023-42753.html
* https://www.suse.com/security/cve/CVE-2023-4389.html
* https://www.suse.com/security/cve/CVE-2023-4622.html
* https://www.suse.com/security/cve/CVE-2023-4623.html
* https://www.suse.com/security/cve/CVE-2023-4881.html
* https://www.suse.com/security/cve/CVE-2023-4921.html
* https://bugzilla.suse.com/show_bug.cgi?id=1207036
* https://bugzilla.suse.com/show_bug.cgi?id=1208995
* https://bugzilla.suse.com/show_bug.cgi?id=1210169
* https://bugzilla.suse.com/show_bug.cgi?id=1210643
* https://bugzilla.suse.com/show_bug.cgi?id=1212703
* https://bugzilla.suse.com/show_bug.cgi?id=1214233
* https://bugzilla.suse.com/show_bug.cgi?id=1214351
* https://bugzilla.suse.com/show_bug.cgi?id=1214380
* https://bugzilla.suse.com/show_bug.cgi?id=1214386
* https://bugzilla.suse.com/show_bug.cgi?id=1215115
* https://bugzilla.suse.com/show_bug.cgi?id=1215117
* https://bugzilla.suse.com/show_bug.cgi?id=1215150
* https://bugzilla.suse.com/show_bug.cgi?id=1215221
* https://bugzilla.suse.com/show_bug.cgi?id=1215275
* https://bugzilla.suse.com/show_bug.cgi?id=1215299
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