Resource Exhaustion Affecting kernel-rt package, versions <0:3.10.0-862.rt56.804.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CENTOS7-KERNELRT-2099882
- published26 Jul 2021
- disclosed21 Sept 2017
Introduced: 21 Sep 2017
CVE-2017-12190 (opens in a new tab)How to fix?
Upgrade Centos:7 kernel-rt to version 0:3.10.0-862.rt56.804.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O vector has small consecutive buffers belonging to the same page. The bio_add_pc_page function merges them into one, but the page reference is never dropped. This causes a memory leak and possible system lockup (exploitable against the host OS by a guest OS user, if a SCSI disk is passed through to a virtual machine) due to an out-of-memory condition.
References
- http://www.securityfocus.com/bid/101911
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95d78c28b5a85bacbc29b8dba7c04babb9b0d467
- https://bugzilla.redhat.com/show_bug.cgi?id=1495089
- http://seclists.org/oss-sec/2017/q4/52
- https://github.com/torvalds/linux/commit/2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058
- https://github.com/torvalds/linux/commit/95d78c28b5a85bacbc29b8dba7c04babb9b0d467
- https://support.f5.com/csp/article/K93472064?utm_source=f5support&utm_medium=RSS
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.8
- https://access.redhat.com/security/cve/CVE-2017-12190
- https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
- https://access.redhat.com/errata/RHSA-2018:0676
- https://usn.ubuntu.com/3582-1/
- https://usn.ubuntu.com/3582-2/
- https://usn.ubuntu.com/3583-1/
- https://usn.ubuntu.com/3583-2/
- https://support.f5.com/csp/article/K93472064?utm_source=f5support&%3Butm_medium=RSS