{"schemaVersion":3,"id":"SUSE-SU-2023:4142-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Security update for the Linux Kernel\n\n\nThe SUSE Linux Enterprise 15 SP3 RT kernel was updated to receive various security and bugfixes.\n\nThe following security bugs were fixed:\n\n- 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).\n- 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).\n- CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95% (bsc#1212703).\n- 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).\n- CVE-2023-4004: Fixed improper element removal netfilter nft_set_pipapo (bsc#1213812).\n- 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).\n- 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).\n- CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299).\n- CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169).\n- 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).\n- CVE-2023-4881: Fixed a out-of-bounds write flaw in the netfilter subsystem that could lead to potential information disclosure or a denial of service (bsc#1215221).\n- CVE-2023-40283: Fixed use-after-free in l2cap_sock_ready_cb (bsc#1214233).\n- CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).\n\nThe following non-security bugs were fixed:\n\n- bnx2x: new flag for track HW resource allocation (bsc#1202845 bsc#1215322).\n- check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380). gcc7 on SLE 15 does not support this while later gcc does.\n- locking/rwsem: Disable reader optimistic spinning (bnc#1176588).\n- mkspec: Allow unsupported KMPs (bsc#1214386)\n- scsi: qedf: Add synchronization between I/O completions and abort (bsc#1210658).\n- x86/pkeys: Revert a5eff7259790 ('x86/pkeys: Add PKRU value to init_fpstate') (bsc#1215356).\n- x86/srso: Do not probe microcode in a guest (git-fixes).\n- x86/srso: Fix SBPB enablement for spec_rstack_overflow=off (git-fixes).\n- x86/srso: Fix srso_show_state() side effect (git-fixes).\n- x86/srso: Set CPUID feature bits independently of bug or mitigation status (git-fixes).","dates":{"published":"2023-10-20T09:35:16.000Z","modified":"2026-02-04T04:00:03.872Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"suse","product":"kernel-rt&distro=SUSE Linux Enterprise Micro 5.1","name":"kernel-rt","label":"kernel-rt&distro=SUSE Linux Enterprise Micro 5.1","ecosystem":"SUSE Linux Enterprise","cpePart":null,"purl":"pkg:rpm/suse/kernel-rt&distro=SUSE Linux Enterprise Micro 5.1","purlType":"rpm","versions":[{"text":"< 5.3.18-150300.144.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.3.18-150300.144.1","eol":null,"hubHref":null},{"vendor":"suse","product":"kernel-rt&distro=SUSE Linux Enterprise Micro 5.2","name":"kernel-rt","label":"kernel-rt&distro=SUSE Linux Enterprise Micro 5.2","ecosystem":"SUSE Linux Enterprise","cpePart":null,"purl":"pkg:rpm/suse/kernel-rt&distro=SUSE Linux Enterprise Micro 5.2","purlType":"rpm","versions":[{"text":"< 5.3.18-150300.144.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.3.18-150300.144.1","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/","label":"www.suse.com/support/update/announcement/2023/suse-su-20234142-1/","hostname":"www.suse.com","tags":["Advisory"]},{"url":"https://bugzilla.suse.com/1176588","label":"bugzilla.suse.com/1176588","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1202845","label":"bugzilla.suse.com/1202845","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1207270","label":"bugzilla.suse.com/1207270","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1208995","label":"bugzilla.suse.com/1208995","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1210169","label":"bugzilla.suse.com/1210169","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1210643","label":"bugzilla.suse.com/1210643","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1210658","label":"bugzilla.suse.com/1210658","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1212703","label":"bugzilla.suse.com/1212703","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1213812","label":"bugzilla.suse.com/1213812","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1214233","label":"bugzilla.suse.com/1214233","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1214351","label":"bugzilla.suse.com/1214351","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1214380","label":"bugzilla.suse.com/1214380","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1214386","label":"bugzilla.suse.com/1214386","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1215115","label":"bugzilla.suse.com/1215115","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1215117","label":"bugzilla.suse.com/1215117","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1215150","label":"bugzilla.suse.com/1215150","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1215221","label":"bugzilla.suse.com/1215221","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1215275","label":"bugzilla.suse.com/1215275","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1215299","label":"bugzilla.suse.com/1215299","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1215322","label":"bugzilla.suse.com/1215322","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1215356","label":"bugzilla.suse.com/1215356","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://www.suse.com/security/cve/CVE-2020-36766","label":"www.suse.com/security/cve/CVE-2020-36766","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-1192","label":"www.suse.com/security/cve/CVE-2023-1192","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-1206","label":"www.suse.com/security/cve/CVE-2023-1206","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-1859","label":"www.suse.com/security/cve/CVE-2023-1859","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-2177","label":"www.suse.com/security/cve/CVE-2023-2177","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-4004","label":"www.suse.com/security/cve/CVE-2023-4004","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-40283","label":"www.suse.com/security/cve/CVE-2023-40283","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-42753","label":"www.suse.com/security/cve/CVE-2023-42753","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-4389","label":"www.suse.com/security/cve/CVE-2023-4389","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-4622","label":"www.suse.com/security/cve/CVE-2023-4622","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-4623","label":"www.suse.com/security/cve/CVE-2023-4623","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-4881","label":"www.suse.com/security/cve/CVE-2023-4881","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2023-4921","label":"www.suse.com/security/cve/CVE-2023-4921","hostname":"www.suse.com","tags":["WEB"]}],"lineage":{"upstream":["CVE-2020-36766","CVE-2023-1192","CVE-2023-1206","CVE-2023-1859","CVE-2023-2177","CVE-2023-4004","CVE-2023-40283","CVE-2023-42753","CVE-2023-4389","CVE-2023-4622","CVE-2023-4623","CVE-2023-4881","CVE-2023-4921"],"downstream":[],"duplicates":[],"related":["CVE-2020-36766","CVE-2023-1192","CVE-2023-1206","CVE-2023-1859","CVE-2023-2177","CVE-2023-4004","CVE-2023-40283","CVE-2023-42753","CVE-2023-4389","CVE-2023-4622","CVE-2023-4623","CVE-2023-4881","CVE-2023-4921"]},"timeline":[{"kind":"published","date":"2023-10-20T09:35:16.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-04T04:00:03.872Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T15:49:33.503Z","stale":false,"partial":false}}