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CVE-2019-10639

26
FAUCET Score

CVE-2019-10639 is an information exposure vulnerability in Linux kernel versions 4.1 through 5.0.8 that allows for a KASLR bypass. Attackers can remotely extract the kernel image offset by analyzing IP ID values from connection-less protocols like UDP and ICMP, forcing the target to send traffic to attacker-controlled IPs. With a CVSS score of 7.5 (High), this vulnerability has a low attack complexity and can lead to full kernel address disclosure. There is no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.1, <= 4.20.9CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.0, < 5.0.8CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.25%
Probability of exploitation in next 30 days
EPSS Percentile
87.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0325 is in the 77th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-1127.rt56.1093.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-1127.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.7 Extended Update SupportFixed in: kernel-0:3.10.0-1062.26.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-193.rt13.51.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-193.el8
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt

Vendor Advisories (1)

redhatCVE-2019-10639Low

Kernel: net: using kernel space address bits to derive IP ID may potentially break KASLR

Jul 15, 2019

References

lists.opensuse.org / opensuse-security-announce/2019-07/msg00014.html
lists.opensuse.org / opensuse-security-announce/2019-07/msg00025.html
arxiv.org / pdf/1906.10478.pdf
Third Party Advisory
cdn.kernel.org / pub/linux/kernel/v5.x/ChangeLog-5.0.8
Mailing ListRelease NotesVendor Advisory
github.com / torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92
PatchThird Party Advisory
git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Mailing ListPatchVendor Advisory
lists.debian.org / debian-lts-announce/2019/07/msg00022.html
lists.debian.org / debian-lts-announce/2019/08/msg00017.html
seclists.org / bugtraq/2019/Aug/18
security.netapp.com / advisory/ntap-20190806-0001
support.f5.com / csp/article/K32804955
support.f5.com / csp/article/K32804955
usn.ubuntu.com / 4115-1
usn.ubuntu.com / 4118-1
debian.org / security/2019/dsa-4497
oracle.com / security-alerts/cpuApr2021.html