CVE-2019-16921
In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns...
In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.
- Record
CVE-2019-16921- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-665
- Updated
- 2026-11-02
CVE List No score
In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.
- Record
CVE-2019-16921- Updated
- 2026-11-02
EUVDEUVD-2019-7415 No score
In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.
- Record
EUVD-2019-7415- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4f4g-m6h2-8q23
In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns...
In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.
- Record
GHSA-4f4g-m6h2-8q23- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-665
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-16921
In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.
- Record
UBUNTU-CVE-2019-16921- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-06
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
linuxUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 3.11.0-12.193.12.0-1.33.12.0-2.53.12.0-2.73.12.0-3.8 Show 45 moreShow less3.12.0-3.93.12.0-4.103.12.0-4.123.12.0-5.133.12.0-7.153.13.0-1.163.13.0-2.173.13.0-3.183.13.0-4.193.13.0-5.203.13.0-6.233.13.0-7.253.13.0-7.263.13.0-8.273.13.0-8.283.13.0-10.303.13.0-11.313.13.0-12.323.13.0-13.333.13.0-14.343.13.0-15.353.13.0-16.363.13.0-17.373.13.0-18.383.13.0-19.393.13.0-19.403.13.0-20.423.13.0-21.433.13.0-22.443.13.0-23.453.13.0-24.463.13.0-24.473.13.0-27.503.13.0-29.533.13.0-30.543.13.0-30.553.13.0-32.573.13.0-33.583.13.0-34.603.13.0-35.623.13.0-36.633.13.0-37.643.13.0-39.663.13.0-40.693.13.0-41.70 |
None known |
linux-awsUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 4.4.0-1002.24.4.0-1003.34.4.0-1005.54.4.0-1006.64.4.0-1009.9 Show 45 moreShow less4.4.0-1010.104.4.0-1011.114.4.0-1012.124.4.0-1014.144.4.0-1016.164.4.0-1017.174.4.0-1019.194.4.0-1022.224.4.0-1023.234.4.0-1024.254.4.0-1025.264.4.0-1027.304.4.0-1028.314.4.0-1029.324.4.0-1031.344.4.0-1032.354.4.0-1034.374.4.0-1036.394.4.0-1037.404.4.0-1038.414.4.0-1039.424.4.0-1040.434.4.0-1042.454.4.0-1044.474.4.0-1045.484.4.0-1046.504.4.0-1048.524.4.0-1050.544.4.0-1052.564.4.0-1054.584.4.0-1055.594.4.0-1056.604.4.0-1058.624.4.0-1059.634.4.0-1060.644.4.0-1061.654.4.0-1062.664.4.0-1064.684.4.0-1065.694.4.0-1066.704.4.0-1067.714.4.0-1073.774.4.0-1074.784.4.0-1075.794.4.0-1076.80 |
None known |
linux-azureUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 4.15.0-1023.24~14.04.14.15.0-1030.31~14.04.14.15.0-1031.32~14.04.14.15.0-1032.33~14.04.24.15.0-1035.36~14.04.2 Show 45 moreShow less4.15.0-1036.38~14.04.24.15.0-1037.39~14.04.24.15.0-1039.41~14.04.24.15.0-1040.44~14.04.14.15.0-1041.45~14.04.14.15.0-1042.46~14.04.14.15.0-1045.49~14.04.14.15.0-1046.50~14.04.14.15.0-1047.51~14.04.14.15.0-1049.54~14.04.14.15.0-1050.55~14.04.14.15.0-1051.56~14.04.14.15.0-1052.57~14.04.14.15.0-1055.60~14.04.14.15.0-1056.61~14.04.14.15.0-1057.62~14.04.14.15.0-1059.64~14.04.14.15.0-1060.65~14.04.14.15.0-1061.66~14.04.14.15.0-1063.68~14.04.14.15.0-1064.69~14.04.14.15.0-1066.71~14.04.14.15.0-1067.72~14.04.14.15.0-1069.74~14.04.14.15.0-1071.76~14.04.14.15.0-1074.79~14.04.14.15.0-1077.82~14.04.14.15.0-1082.92~14.04.14.15.0-1083.93~14.04.14.15.0-1089.99~14.04.14.15.0-1091.101~14.04.14.15.0-1092.102~14.04.14.15.0-1093.103~14.04.14.15.0-1095.105~14.04.14.15.0-1096.106~14.04.14.15.0-1098.109~14.04.14.15.0-1100.111~14.04.14.15.0-1102.113~14.04.14.15.0-1103.114~14.04.14.15.0-1106.118~14.04.14.15.0-1108.120~14.04.14.15.0-1109.121~14.04.14.15.0-1110.122~14.04.14.15.0-1111.123~14.04.14.15.0-1112.124~14.04.1 |
None known |
linux-lts-xenialUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 4.4.0-13.29~14.04.14.4.0-14.30~14.04.24.4.0-15.31~14.04.14.4.0-18.34~14.04.14.4.0-21.37~14.04.1 Show 45 moreShow less4.4.0-22.39~14.04.14.4.0-22.40~14.04.14.4.0-24.43~14.04.14.4.0-28.47~14.04.14.4.0-31.50~14.04.14.4.0-34.53~14.04.14.4.0-36.55~14.04.14.4.0-38.57~14.04.14.4.0-42.62~14.04.14.4.0-45.66~14.04.14.4.0-47.68~14.04.14.4.0-51.72~14.04.14.4.0-53.74~14.04.14.4.0-57.78~14.04.14.4.0-59.80~14.04.14.4.0-62.83~14.04.14.4.0-63.84~14.04.24.4.0-64.85~14.04.14.4.0-66.87~14.04.14.4.0-67.88~14.04.14.4.0-70.91~14.04.14.4.0-71.92~14.04.14.4.0-72.93~14.04.14.4.0-75.96~14.04.14.4.0-78.99~14.04.24.4.0-79.100~14.04.14.4.0-81.104~14.04.14.4.0-83.106~14.04.14.4.0-87.110~14.04.14.4.0-89.112~14.04.14.4.0-91.114~14.04.14.4.0-92.115~14.04.14.4.0-93.116~14.04.14.4.0-96.119~14.04.14.4.0-97.120~14.04.14.4.0-98.121~14.04.14.4.0-101.124~14.04.14.4.0-103.126~14.04.14.4.0-104.127~14.04.14.4.0-108.131~14.04.14.4.0-109.132~14.04.14.4.0-111.134~14.04.14.4.0-112.135~14.04.14.4.0-116.140~14.04.14.4.0-119.143~14.04.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-16921 is a high vulnerability (CVSS 7.5) in Linux Kernel, published September 27, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.93%, the 80th percentile. No source names a fixed version.
References
github.com/torvalds/linux/commit/df7e40425813c50cd252e6f5e348a81ef1acae56
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=df7e40425813c50cd252e6f5e348a81ef1acae56
nvd.nist.gov/vuln/detail/CVE-2019-16921
ubuntu.com/security/CVE-2019-16921
cve.org/CVERecord?id=CVE-2019-16921
Left out here: 415 versions. The JSON record has them.