CVE-2019-10638: In the Linux kernel before 5.1.7, a device can be tracked by an attacker using the IP ID values the kernel produces for connection-less…
Noroxi assessment
Priority: Monitor (action score 27/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 2.5% (FIRST EPSS); higher than 85.3% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: linux (Debian:10) 4.19.37-5+deb10u2; linux (Debian:12) 5.2.6-1; linux (Debian:8) 3.16.72-1.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to linux (Debian:10) 4.19.37-5+deb10u2; linux (Debian:12) 5.2.6-1; linux (Debian:8) 3.16.72-1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel before 5.1.7, a device can be tracked by an attacker using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack may be conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses.
- BDU:2019-02915
- DLA-1884-1
- DLA-1885-1
- DSA-4495-1
- DSA-4497-1
- openSUSE-SU-2019:1716-1
- openSUSE-SU-2019:1757-1
- RHSA-2019:3309
- RHSA-2019:3517
- RHSA-2020:1016
- RHSA-2020:1070
- SUSE-SU-2019:1823-1
- SUSE-SU-2019:1823-2
- SUSE-SU-2019:1829-1
- SUSE-SU-2019:1851-1
- SUSE-SU-2019:1852-1
- SUSE-SU-2019:1854-1
- SUSE-SU-2019:1855-1
- SUSE-SU-2019:2069-1
- SUSE-SU-2019:2430-1
- Published
- Jul 5, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.5% · 85th percentile
- CWE
- CWE-326
Report tools
Action score
27
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.5%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
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Run the SSL checkAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernelbefore 5.1.7
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | linux | before 4.19.37-5+deb10u2 | 4.19.37-5+deb10u2 |
| Debian:12 | linux | before 5.2.6-1 | 5.2.6-1 |
| Debian:8 | linux | before 3.16.72-1 | 3.16.72-1 |
| Debian:8 | linux-4.9 | before 4.9.168-1+deb9u5~deb8u1 | 4.9.168-1+deb9u5~deb8u1 |
| Debian:9 | linux | before 4.9.168-1+deb9u5 | 4.9.168-1+deb9u5 |
| openSUSE:Leap 15.0 | kernel-debug | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-default | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-docs | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-kvmsmall | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-obs-build | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-obs-qa | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-source | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-syms | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-vanilla | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.1 | kernel-debug | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-default | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-docs | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-kvmsmall | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-obs-build | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-obs-qa | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-source | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-syms | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-vanilla | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| Red Hat:enterprise_linux:7::client | bpftool | before 0:3.10.0-1127.el7 | 0:3.10.0-1127.el7 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2019-12984Jun 26, 2019 · A NULL pointer dereference vulnerability in the function nfc_genl_deactivate_target() in net/nfc/netlink.c in the Linux kernel before…23Monitor
- ← EarlierCVE-2019-13233Jul 4, 2019 · In arch/x86/lib/insn-eval.c in the Linux kernel before 5.1.9, there is a use-after-free for access to an LDT entry because of a race…28Monitor
- Later →CVE-2019-10639Jul 5, 2019 · The Linux kernel 4.x (starting from 4.1) and 5.x before 5.0.8 allows Information Exposure (partial kernel address disclosure), leading to a…31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux | 5.2.6-1 · Debian:12 | Package registry (OSV) |
| debian:linux-4.9 | 4.9.168-1+deb9u5~deb8u1 · Debian:8 | Package registry (OSV) |
| opensuse:kernel-debug | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-default | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-docs | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-obs-build | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-source | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-syms | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-vanilla | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:kernel-rt | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-core | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-core | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-debuginfo | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-devel | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-kvm | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-kvm-debuginfo | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-modules | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-modules-extra | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debuginfo | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debuginfo-common-x86_64 | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| suse:kernel-azure | 4.12.14-5.33.1 · SUSE:Linux Enterprise Module for Public Cloud 15 | Package registry (OSV) |
| suse:kernel-default | 4.4.121-92.117.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
| suse:kernel-docs | 4.12.14-95.24.1 · SUSE:Linux Enterprise Software Development Kit 12 SP4 | Package registry (OSV) |
| suse:kernel-obs-build | 4.12.14-95.24.1 · SUSE:Linux Enterprise Software Development Kit 12 SP4 | Package registry (OSV) |
| suse:kernel-source | 4.4.121-92.117.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
| suse:kernel-source-azure | 4.12.14-5.33.1 · SUSE:Linux Enterprise Module for Public Cloud 15 | Package registry (OSV) |
| suse:kernel-syms | 4.4.121-92.117.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
+5
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-21-0331 · Apr 21, 2021(Oracle Güvenlik Uyarısı Yayınladı)
Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-326 · Inadequate Encryption StrengthCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html
- www.securityfocus.com/bid/109092
- access.redhat.com/errata/RHSA-2019:3309
- access.redhat.com/errata/RHSA-2019:3517
- arxiv.org/pdf/1906.10478.pdf
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.7
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=df453700e8d81b1bdafdf684365ee2b9431fb702
- github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92
- github.com/torvalds/linux/commit/55f0fc7a02de8f12757f4937143d8d5091b2e40b
- github.com/torvalds/linux/commit/df453700e8d81b1bdafdf684365ee2b9431fb702
- lists.debian.org/debian-lts-announce/2019/08/msg00016.html
- lists.debian.org/debian-lts-announce/2019/08/msg00017.html
- seclists.org/bugtraq/2019/Aug/13
- seclists.org/bugtraq/2019/Aug/18
- seclists.org/bugtraq/2019/Nov/11
- security.netapp.com/advisory/ntap-20190806-0001/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.