{"id":"MGASA-2019-0195","summary":"Updated kernel packages fix security vulnerability","details":"This kernel update is based on the upstream 4.14.127 and fixes at least\nthe following security issues:\n\nJonathan Looney discovered that it is possible to send a crafted sequence\nof SACKs which will fragment the RACK send map. An attacker may be able to\nfurther exploit the fragmented send map to cause an expensive linked-list\nwalk for subsequent SACKs received for that same TCP connection\n(CVE-2019-5599).\n\nJonathan Looney discovered that the TCP_SKB_CB(skb)-\u003etcp_gso_segs value\nwas subject to an integer overflow in the Linux kernel when handling TCP\nSelective Acknowledgments (SACKs). A remote attacker could use this to\ncause a denial of service (CVE-2019-11477).\n\nJonathan Looney discovered that the TCP retransmission queue implementation\nin tcp_fragment in the Linux kernel could be fragmented when handling\ncertain TCP Selective Acknowledgment (SACK) sequences. A remote attacker\ncould use this to cause a denial of service (CVE-2019-11478).\n\nJonathan Looney discovered that the Linux kernel default MSS is hard-coded\nto 48 bytes. This allows a remote peer to fragment TCP resend queues\nsignificantly more than if a larger MSS were enforced. A remote attacker\ncould use this to cause a denial of service (CVE-2019-11479).\n\nWireGuard has been updated to 0.0.20190601.\n\nFor other uptstream fixes in this update, see the referenced changelogs.\n","modified":"2026-04-16T04:43:44.636229808Z","published":"2019-06-21T01:07:01Z","upstream":["CVE-2019-11477","CVE-2019-11478","CVE-2019-11479","CVE-2019-5599"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2019-0195.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=24972"},{"type":"ADVISORY","url":"https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md"},{"type":"WEB","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.122"},{"type":"WEB","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.123"},{"type":"WEB","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.124"},{"type":"WEB","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.125"},{"type":"WEB","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.126"},{"type":"WEB","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.127"}],"affected":[{"package":{"name":"kernel","ecosystem":"Mageia:6","purl":"pkg:rpm/mageia/kernel?arch=source&distro=mageia-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.127-1.mga6"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2019-0195.json"}},{"package":{"name":"kernel-userspace-headers","ecosystem":"Mageia:6","purl":"pkg:rpm/mageia/kernel-userspace-headers?arch=source&distro=mageia-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.127-1.mga6"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2019-0195.json"}},{"package":{"name":"kmod-vboxadditions","ecosystem":"Mageia:6","purl":"pkg:rpm/mageia/kmod-vboxadditions?arch=source&distro=mageia-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.8-4.mga6"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2019-0195.json"}},{"package":{"name":"kmod-virtualbox","ecosystem":"Mageia:6","purl":"pkg:rpm/mageia/kmod-virtualbox?arch=source&distro=mageia-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.8-4.mga6"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2019-0195.json"}},{"package":{"name":"kmod-xtables-addons","ecosystem":"Mageia:6","purl":"pkg:rpm/mageia/kmod-xtables-addons?arch=source&distro=mageia-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.13-88.mga6"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2019-0195.json"}},{"package":{"name":"wireguard-tools","ecosystem":"Mageia:6","purl":"pkg:rpm/mageia/wireguard-tools?arch=source&distro=mageia-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20190601-1.mga6"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2019-0195.json"}}],"schema_version":"1.7.5","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}