Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs
Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.
- BDU:2019-02194
- DLA-1823-1
- DLA-1824-1
- DSA-4465-1
- openSUSE-SU-2019:1571-1
- openSUSE-SU-2019:1579-1
- RHSA-2019:1479
- RHSA-2019:1480
- RHSA-2019:1481
- RHSA-2019:1482
- RHSA-2019:1483
- RHSA-2019:1484
- RHSA-2019:1485
- RHSA-2019:1486
- RHSA-2019:1487
- RHSA-2019:1488
- RHSA-2019:1489
- RHSA-2019:1490
- RHSA-2019:1594
- RHSA-2019:1602
- Published
- Jun 18, 2019
- Updated
- Jun 16, 2026
- EPSS
- 98.7% · 100th percentile
- CWE
- CWE-190
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Report tools
Action score
60
This week
Don’t wait for the next maintenance window.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 30 / 30 · 98.7%
CNA vs NVD score
- NVD
- 7.5
- CNA · canonical
- 7.5
- agree
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| f5 | big-ip advanced firewall manager | cpe:2.3:a:f5:big-ip_advanced_firewall_manager |
| f5 | big-ip access policy manager | cpe:2.3:a:f5:big-ip_access_policy_manager |
| f5 | big-ip application acceleration manager | cpe:2.3:a:f5:big-ip_application_acceleration_manager |
| f5 | big-ip link controller | cpe:2.3:a:f5:big-ip_link_controller |
| f5 | big-ip policy enforcement manager | cpe:2.3:a:f5:big-ip_policy_enforcement_manager |
| f5 | big-ip webaccelerator | cpe:2.3:a:f5:big-ip_webaccelerator |
| f5 | big-ip application security manager | cpe:2.3:a:f5:big-ip_application_security_manager |
| f5 | big-ip local traffic manager | cpe:2.3:a:f5:big-ip_local_traffic_manager |
| f5 | big-ip fraud protection service | cpe:2.3:a:f5:big-ip_fraud_protection_service |
| f5 | big-ip global traffic manager | cpe:2.3:a:f5:big-ip_global_traffic_manager |
| f5 | big-ip analytics | cpe:2.3:a:f5:big-ip_analytics |
and 12 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- ivanti connect secureall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (canonical). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux kernel
- 4.4 and later · before 4.4.182affected
- 4.9 and later · before 4.9.182affected
- 4.14 and later · before 4.14.127affected
- 4.19 and later · before 4.19.52affected
- 5.1 and later · before 5.1.11affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 4.19.37-4 | 4.19.37-4 |
| Debian:8 | linux | before 3.16.68-2 | 3.16.68-2 |
| Debian:8 | linux-4.9 | before 4.9.168-1+deb9u3~deb8u1 | 4.9.168-1+deb9u3~deb8u1 |
| Debian:9 | linux | before 4.9.168-1+deb9u3 | 4.9.168-1+deb9u3 |
| openSUSE:Leap 15.0 | kernel-debug | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.0 | kernel-default | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.0 | kernel-docs | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.0 | kernel-kvmsmall | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.0 | kernel-obs-build | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.0 | kernel-obs-qa | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.0 | kernel-source | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.0 | kernel-syms | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.0 | kernel-vanilla | before 4.12.14-lp150.12.64.1 | 4.12.14-lp150.12.64.1 |
| openSUSE:Leap 15.1 | kernel-debug | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| openSUSE:Leap 15.1 | kernel-default | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| openSUSE:Leap 15.1 | kernel-docs | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| openSUSE:Leap 15.1 | kernel-kvmsmall | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| openSUSE:Leap 15.1 | kernel-obs-build | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| openSUSE:Leap 15.1 | kernel-obs-qa | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| openSUSE:Leap 15.1 | kernel-source | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| openSUSE:Leap 15.1 | kernel-syms | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| openSUSE:Leap 15.1 | kernel-vanilla | before 4.12.14-lp151.28.7.1 | 4.12.14-lp151.28.7.1 |
| Red Hat:enterprise_linux:6::client | kernel | before 0:2.6.32-754.15.3.el6 | 0:2.6.32-754.15.3.el6 |
| Red Hat:enterprise_linux:6::client | kernel-abi-whitelists | before 0:2.6.32-754.15.3.el6 | 0:2.6.32-754.15.3.el6 |
+96
Same product
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- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
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 | 4.19.37-4 · Debian:12 | Package registry (OSV) |
| Debian:linux-4.9 | 4.9.168-1+deb9u3~deb8u1 · Debian:8 | Package registry (OSV) |
| openSUSE:kernel-debug | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| openSUSE:kernel-default | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| openSUSE:kernel-docs | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| openSUSE:kernel-kvmsmall | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| openSUSE:kernel-obs-build | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| openSUSE:kernel-obs-qa | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| openSUSE:kernel-source | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| openSUSE:kernel-syms | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| openSUSE:kernel-vanilla | 4.12.14-lp151.28.7.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| Red Hat:bpftool | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:bpftool-debuginfo | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-abi-whitelists | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-core | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-debug | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-debug-core | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-debug-debuginfo | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-debug-devel | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-debug-modules | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-debug-modules-extra | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| Red Hat:kernel-debuginfo | 0:4.18.0-80.4.2.el8_0 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| SUSE:kernel-azure | 4.4.180-4.31.1 · SUSE:Linux Enterprise Server 12 SP3 | Package registry (OSV) |
| SUSE:kernel-bigmem | 3.0.101-108.95.2 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| SUSE:kernel-default | 3.0.101-108.95.2 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| SUSE:kernel-ec2 | 3.0.101-108.95.2 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| SUSE:kernel-pae | 3.0.101-108.95.2 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| SUSE:kernel-ppc64 | 3.0.101-108.95.2 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| SUSE:kernel-source | 3.0.101-108.95.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
+5
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:8 | 2019-07-22 |
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.
- Published
- First PoC+33 d
- TodaySep 29, 2026+2660 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-190 · Integer Overflow or WraparoundCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html
- packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
- www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
- www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-kernel-en
- www.openwall.com/lists/oss-security/2019/06/20/3
- www.openwall.com/lists/oss-security/2019/06/28/2
- www.openwall.com/lists/oss-security/2019/07/06/3
- www.openwall.com/lists/oss-security/2019/07/06/4
- www.openwall.com/lists/oss-security/2019/10/24/1
- www.openwall.com/lists/oss-security/2019/10/29/3
- www.vmware.com/security/advisories/VMSA-2019-0010.html
- access.redhat.com/errata/RHSA-2019:1594
- access.redhat.com/errata/RHSA-2019:1602
- access.redhat.com/errata/RHSA-2019:1699
- access.redhat.com/security/vulnerabilities/tcpsack
- cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
- git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=3b4929f65b0d8249f19a50245cd88ed1a2f78cff
- github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
- kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
- kc.mcafee.com/corporate/index?page=content&id=SB10287
Vendor advisories and official records. Exploit/PoC links are deliberately left out.