🛡️ CVE-2022-26373 on Ubuntu — buffer
Description
Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.
Distribution advisory
This page covers CVE-2022-26373 as tracked by Ubuntu, for the package buffer. The fix is available in version 5.15.0-50.56; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.
Affected software and timeline
Affected software: buffer, linux (fixed in 5.15.0-50.56), linux-aws (fixed in 5.15.0-1021.25), linux-aws-5.0, linux-aws-5.11, linux-aws-5.13, linux-aws-5.15 (fixed in 5.15.0-1021.25~20.04.1), linux-aws-5.3, linux-aws-5.4 (fixed in 5.4.0-1086.93~18.04.1), linux-aws-5.8, linux-aws-fips, linux-aws-hwe (fixed in 4.15.0-1151.164~16.04.1), linux-azure (fixed in 5.15.0-1021.26), linux-azure-4.15 (fixed in 4.15.0-1161.176), linux-azure-5.11, linux-azure-5.13, linux-azure-5.15 (fixed in 5.15.0-1021.26~20.04.1), linux-azure-5.3, linux-azure-5.4 (fixed in 5.4.0-1094.100~18.04.1), linux-azure-5.8, linux-azure-edge, linux-azure-fde (fixed in 5.15.0-1024.30.1), linux-azure-fde-5.15 (fixed in 5.15.0-1114.123~20.04.1), linux-azure-fips, linux-bluefield, linux-dell300x (fixed in 4.15.0-1060.65), linux-fips, linux-gcp (fixed in 5.15.0-1019.25), linux-gcp-4.15 (fixed in 4.15.0-1145.161), linux-gcp-5.11, linux-gcp-5.13, linux-gcp-5.15 (fixed in 5.15.0-1021.28~20.04.1), linux-gcp-5.3, linux-gcp-5.4 (fixed in 5.4.0-1092.101~18.04.1), linux-gcp-5.8, linux-gcp-fips, linux-gke (fixed in 5.15.0-1017.20), linux-gke-4.15, linux-gke-5.15 (fixed in 5.15.0-1019.23~20.04.1), linux-gke-5.4, linux-gkeop (fixed in 5.15.0-1004.6), linux-gkeop-5.15 (fixed in 5.15.0-1005.7~20.04.1), linux-gkeop-5.4, linux-hwe, linux-hwe-5.11, linux-hwe-5.13, linux-hwe-5.15 (fixed in 5.15.0-50.56~20.04.1), linux-hwe-5.4 (fixed in 5.4.0-128.144~18.04.1), linux-hwe-5.8, linux-hwe-edge, linux-ibm (fixed in 5.15.0-1015.17), linux-ibm-5.4 (fixed in 5.4.0-1034.38~18.04.1), linux-intel-5.13, linux-intel-iot-realtime, linux-intel-iotg (fixed in 5.15.0-1017.22), linux-intel-iotg-5.15 (fixed in 5.15.0-1017.22~20.04.1), linux-iot (fixed in 5.4.0-1005.7), linux-kvm (fixed in 5.15.0-1019.23), linux-lowlatency (fixed in 5.15.0-50.56), linux-lowlatency-hwe-5.15 (fixed in 5.15.0-50.56~20.04.1), linux-lts-xenial (fixed in 4.4.0-242.276~14.04.1), linux-nvidia (fixed in 5.15.0-1015.15), linux-oem, linux-oem-5.10, linux-oem-5.13, linux-oem-5.14, linux-oem-5.17, linux-oem-5.6, linux-oracle (fixed in 5.15.0-1019.24), linux-oracle-5.0, linux-oracle-5.11, linux-oracle-5.13, linux-oracle-5.15 (fixed in 5.15.0-1019.24~20.04.1), linux-oracle-5.3, linux-oracle-5.4 (fixed in 5.4.0-1084.92~18.04.1), linux-oracle-5.8, linux-raspi (fixed in 5.15.0-1016.18), linux-raspi-5.4 (fixed in 5.4.0-1071.81~18.04.1), linux-raspi-realtime, linux-raspi2, linux-realtime (fixed in 5.15.0-1022.22), linux-riscv (fixed in 5.15.0-1020.23), linux-riscv-5.11, linux-riscv-5.15 (fixed in 5.15.0-1022.26~20.04.1), linux-riscv-5.8 and linux-snapdragon (fixed in 4.15.0-1145.155). Published on 18 August 2022 and last revised on 11 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
www.intel.com (Report)
www.intel.com (Report)
git.kernel.org (Report)
git.kernel.org (Report)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
CVE-2022-26373 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| buffer | — | — |
| linux | — | 5.15.0-50.56 |
| linux-aws | — | 5.15.0-1021.25 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1021.25~20.04.1 |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | 5.4.0-1086.93~18.04.1 |
| linux-aws-5.8 | — | — |
| linux-aws-fips | — | — |
| linux-aws-hwe | — | 4.15.0-1151.164~16.04.1 |
| linux-azure | — | 5.15.0-1021.26 |
| linux-azure-4.15 | — | 4.15.0-1161.176 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1021.26~20.04.1 |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | 5.4.0-1094.100~18.04.1 |
| linux-azure-5.8 | — | — |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 5.15.0-1024.30.1 |
| linux-azure-fde-5.15 | — | 5.15.0-1114.123~20.04.1 |
| linux-azure-fips | — | — |
| linux-bluefield | — | — |
| linux-dell300x | — | 4.15.0-1060.65 |
| linux-fips | — | — |
| linux-gcp | — | 5.15.0-1019.25 |
| linux-gcp-4.15 | — | 4.15.0-1145.161 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1021.28~20.04.1 |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | 5.4.0-1092.101~18.04.1 |
| linux-gcp-5.8 | — | — |
| linux-gcp-fips | — | — |
| linux-gke | — | 5.15.0-1017.20 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | 5.15.0-1019.23~20.04.1 |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1004.6 |
| linux-gkeop-5.15 | — | 5.15.0-1005.7~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-50.56~20.04.1 |
| linux-hwe-5.4 | — | 5.4.0-128.144~18.04.1 |
| linux-hwe-5.8 | — | — |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.15.0-1015.17 |
| linux-ibm-5.4 | — | 5.4.0-1034.38~18.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | — |
| linux-intel-iotg | — | 5.15.0-1017.22 |
| linux-intel-iotg-5.15 | — | 5.15.0-1017.22~20.04.1 |
| linux-iot | — | 5.4.0-1005.7 |
| linux-kvm | — | 5.15.0-1019.23 |
| linux-lowlatency | — | 5.15.0-50.56 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-50.56~20.04.1 |
| linux-lts-xenial | — | 4.4.0-242.276~14.04.1 |
| linux-nvidia | — | 5.15.0-1015.15 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.17 | — | — |
| linux-oem-5.6 | — | — |
| linux-oracle | — | 5.15.0-1019.24 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1019.24~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | 5.4.0-1084.92~18.04.1 |
| linux-oracle-5.8 | — | — |
| linux-raspi | — | 5.15.0-1016.18 |
| linux-raspi-5.4 | — | 5.4.0-1071.81~18.04.1 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | 5.15.0-1022.22 |
| linux-riscv | — | 5.15.0-1020.23 |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1022.26~20.04.1 |
| linux-riscv-5.8 | — | — |
| linux-snapdragon | — | 4.15.0-1145.155 |
References
Similar Threats
- Unknown MAL-2025-191979
- Unknown MAL-2025-185919
- Unknown MAL-2025-185920
- Unknown MAL-2025-185921
- Unknown MAL-2025-140150
Vulnerability Monitoring
Track new vulnerabilities in buffer
UBUNTU-CVE-2022-26373 is rated CVSS 5.5 Medium. BotEraser monitors your WordPress installation and notifies you when software you use appears in our vulnerability database.
Set Up Free Alerts →No credit card required · Results in minutes
ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.
