Security update for the Linux Kernel (Live Patch 31 for SLE 12 SP1) (Important)
Description:
This update for the Linux Kernel 3.12.74-60_64_104 fixes several issues.
The following security issues were fixed:
- CVE-2019-11477: Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. (bsc#1137586) - CVE-2019-11478: Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. (bsc#1137586)
This update contains a regression fix for CVE-2019-11477 and CVE-2019-11478 (bsc#1140747).
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