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Category:   OS (Linux)  >   Linux Kernel Vendors:
(Oracle Issues Fix for Oracle Linux) Linux Kernel Bug in cipso_v4_optptr() Lets Remote Users Deny Service
SecurityTracker Alert ID:  1041602
SecurityTracker URL:
CVE Reference:   CVE-2018-10938   (Links to External Site)
Date:  Sep 5 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Oracle Linux 6, Oracle Linux 7
Description:   A vulnerability was reported in the Linux kernel. A remote user can cause denial of service conditions on the target system.

A remote user can send specially crafted data to trigger an infinite loop in the cipso_v4_optptr() function in 'net/ipv4/cipso_ipv4.c'.

Impact:   A remote user can cause the kernel to enter an infinite loop.
Solution:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

Vendor URL: (Links to External Site)
Cause:   State error

Message History:   This archive entry is a follow-up to the message listed below.
Aug 27 2018 Linux Kernel Bug in cipso_v4_optptr() Lets Remote Users Deny Service

 Source Message Contents

Subject:  [El-errata] ELSA-2018-4208 Important: Oracle Linux 7 Unbreakable Enterprise kernel security update

Oracle Linux Security Advisory ELSA-2018-4208

The following updated rpms for Oracle Linux 7 have been uploaded to the 
Unbreakable Linux Network:



Description of changes:

- rebuild bumping release

- Cipso: cipso_v4_optptr enter infinite loop (yujuan.qi)  [Orabug: 
28563992]  {CVE-2018-10938}
- Btrfs: fix list_add corruption and soft lockups in fsync (Liu Bo) 
[Orabug: 28119834]
- x86/paravirt: Fix spectre-v2 mitigations for paravirt guests (Peter 
Zijlstra)  [Orabug: 28474643]  {CVE-2018-15594}
- sym53c8xx: fix NULL pointer dereference panic in sym_int_sir() in 
sym_hipd.c (George Kennedy)  [Orabug: 28481893]
- md/raid1: Avoid raid1 resync getting stuck (Jes Sorensen)  [Orabug: 
- x86/spectrev2: Don't set mode to SPECTRE_V2_NONE when retpoline is 
available. (Boris Ostrovsky)  [Orabug: 28540376]

- ext4: avoid deadlock when expanding inode size (Jan Kara)  [Orabug: 
- ext4: properly align shifted xattrs when expanding inodes (Jan Kara) 
[Orabug: 25718971]
- ext4: fix xattr shifting when expanding inodes part 2 (Jan Kara) 
[Orabug: 25718971]
- ext4: fix xattr shifting when expanding inodes (Jan Kara)  [Orabug: 
- uek-rpm: Enable perf stripped binary (Victor Erminpour)  [Orabug: 
- nfsd: give out fewer session slots as limit approaches (J. Bruce 
Fields)  [Orabug: 28023821]
- nfsd: increase DRC cache limit (J. Bruce Fields)  [Orabug: 28023821]
- uek-rpm: config-debug: Turn off torture testing by default (Knut 
Omang)  [Orabug: 28261886]
- ipmi: Remove smi_msg from waiting_rcv_msgs list before 
handle_one_recv_msg() (Junichi Nomura)
- x86/mce/AMD: Give a name to MCA bank 3 when accessed with legacy MSRs 
(Yazen Ghannam)  [Orabug: 28416303]
- Fix up non-directory creation in SGID directories (Linus Torvalds) 
[Orabug: 28459477]  {CVE-2018-13405}
- scsi: libsas: defer ata device eh commands to libata (Jason Yan) 
[Orabug: 28459685]  {CVE-2018-10021}
- PCI: Allocate ATS struct during enumeration (Bjorn Helgaas)  [Orabug: 

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