7.8

CVE-2018-20856

An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 4.18.7
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.71% 0.485
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 4.6 3.9 6.4
AV:L/AC:L/Au:N/C:P/I:P/A:P
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://seclists.org/bugtraq/2019/Aug/18
https://www.debian.org/security/2019/dsa-4497
https://usn.ubuntu.com/4094-1/
https://usn.ubuntu.com/4118-1/
https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html
https://access.redhat.com/errata/RHSA-2019:3217
https://access.redhat.com/errata/RHSA-2020:0103
https://access.redhat.com/errata/RHSA-2020:0100
https://usn.ubuntu.com/4116-1/
https://access.redhat.com/errata/RHSA-2020:0543
http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
https://access.redhat.com/errata/RHSA-2019:3055
https://access.redhat.com/errata/RHSA-2019:3076
https://access.redhat.com/errata/RHSA-2019:3089
http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
https://seclists.org/bugtraq/2019/Aug/26
https://security.netapp.com/advisory/ntap-20190905-0002/
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.7
Vendor Advisory
Mailing List
Release Notes
https://access.redhat.com/errata/RHSA-2020:0664
https://access.redhat.com/errata/RHSA-2020:0698
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54648cf1ec2d7f4b6a71767799c45676a138ca24
Patch
Vendor Advisory
Mailing List
https://github.com/torvalds/linux/commit/54648cf1ec2d7f4b6a71767799c45676a138ca24
Patch
Third Party Advisory
https://support.f5.com/csp/article/K14673240?utm_source=f5support&amp%3Butm_medium=RSS