Description
In the Linux kernel, the following vulnerability has been resolved:
powerpc/pseries: Enforce hcall result buffer validity and size
plpar_hcall(), plpar_hcall9(), and related functions expect callers to
provide valid result buffers of certain minimum size. Currently this
is communicated only through comments in the code and the compiler has
no idea.
For example, if I write a bug like this:
long retbuf[PLPAR_HCALL_BUFSIZE]; // should be PLPAR_HCALL9_BUFSIZE
plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, ...);
This compiles with no diagnostics emitted, but likely results in stack
corruption at runtime when plpar_hcall9() stores results past the end
of the array. (To be clear this is a contrived example and I have not
found a real instance yet.)
To make this class of error less likely, we can use explicitly-sized
array parameters instead of pointers in the declarations for the hcall
APIs. When compiled with -Warray-bounds[1], the code above now
provokes a diagnostic like this:
error: array argument is too small;
is of size 32, callee requires at least 72 [-Werror,-Warray-bounds]
60 | plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf,
| ^ ~~~~~~
[1] Enabled for LLVM builds but not GCC for now. See commit
0da6e5fd6c37 ("gcc: disable '-Warray-bounds' for gcc-13 too") and
related changes.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 2.6.19 | 4.19.317 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.9.7-1 | — |
| Debian 13 | linux | 6.9.7-1 | — |
| Debian 12 | linux | 6.1.99-1 | DSA-5731-1 |
| Debian 11 | linux | 5.10.221-1 | DSA-5730-1 |
| Debian 11 | linux-6.1 | 6.1.119-1~deb11u1 | DLA-4008-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1052.54 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-44.44 | USN-6999-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1015.16 | USN-6999-1 |
| Ubuntu 24.04 LTS | linux-gcp +1 | 6.8.0-1014.16 | USN-7004-1, USN-6999-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1010.13 | USN-6999-1 |
| Ubuntu 24.04 LTS | linux-ibm +2 | 6.8.0-1012.12 | USN-6999-1 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1013.14 | USN-7005-1 |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1013.14.1 | USN-7005-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1011.12 | USN-6999-2 |
| Ubuntu 24.04 LTS | linux-riscv +1 | 6.8.0-44.44.1 | USN-6999-1 |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-121.131 | USN-7007-3, USN-7007-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1069.75 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1015.16~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1072.81 | USN-7009-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1072.81.1 | USN-7009-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1068.76 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 +1 | 6.8.0-1014.16~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1066.72 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1052.59 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-45.45~22.04.1 | USN-7029-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1062.65 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 +1 | 6.8.0-1012.12~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1064.70 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1066.71 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1064.65 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1013.14~22.04.1 | USN-7005-2 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1028.28 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1016.16 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1067.73 | USN-7007-1 |
| Ubuntu 22.04 LTS | linux-riscv +31 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 +1 | 6.8.0-44.44.1~22.04.1 | USN-7008-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1035.39 | USN-7019-1 |
| Ubuntu 20.04 LTS | linux | 5.4.0-195.215 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1132.142 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1069.75~20.04.1 | USN-7007-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1137.144 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1072.81~20.04.1 | USN-7009-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1072.81~20.04.1.1 | USN-7009-2 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1092.99 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1136.145 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1068.76~20.04.1 | USN-7007-1 |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1099.103 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1052.59~20.04.1 | USN-7007-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-121.131~20.04.1 | USN-7007-3, USN-7007-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1079.84 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1062.65~20.04.1 | USN-7007-2 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1064.70~20.04.1 | USN-7007-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1043.44 | USN-7006-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1120.128 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1030.30~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1131.140 | USN-7003-1 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1067.73~20.04.1 | USN-7007-2 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1116.128 | USN-7003-4 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1065.69~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1051.55 | USN-7003-3 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2010.10 | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1008.8 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1063.65 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1070.78 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1008.8~22.04.1 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-78.78+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1069.75+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1072.81+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-121.131+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1068.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1132.142+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1137.144+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1106.116 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1136.145+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux +5 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1132.142~18.04.1 | USN-7003-2 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1137.144~18.04.1 | USN-7003-2 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1136.145~18.04.1 | USN-7003-2 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-195.215~18.04.1 | USN-7003-2 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1079.84~18.04.1 | USN-7003-2 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1131.140~18.04.1 | USN-7003-2 |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1116.128~18.04.1 | USN-7003-5 |
| Ubuntu Pro 16.04 LTS | linux +7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux +3 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | perf +26 | 4.18.0-553.16.1.el8_10 | RHSA-2024:5101 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | perf +24 | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-553.16.1.el8_10 | RXSA-2024:5101, RLSA-2024:5101 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | kernel-uek +12 | 5.15.0-210.163.7.el9uek | ELSA-2024-12618 |
| Oracle Linux 8 | perf +19 | 4.18.0-553.16.1.el8_10 | ELSA-2024-12618, ELSA-2024-5101 |
| Oracle Linux 7 | kernel-uek-container +1 | 5.4.17-2136.335.4.el8 | ELSA-2024-12612 |
| Oracle Linux 7 | perf +10 | 4.14.35-2047.541.4.1.el7uek | ELSA-2024-12779, ELSA-2024-12610 |
Advisories 36
- WID-SEC-2024-1607 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 5, 2026
- ALSA-2024:5101 Important: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-7007-1 linux, linux-aws, linux-aws-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-ibm, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-nvidia, linux-oracle, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6999-1 linux, linux-aws, linux-gcp, linux-gke, linux-ibm, linux-lowlatency, linux-oem-6.8, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7003-2 linux-aws-5.4, linux-azure-5.4, linux-gcp-5.4, linux-hwe-5.4, linux-ibm-5.4, linux-oracle-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7009-1 linux-azure, linux-azure-5.15, linux-azure-fde vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7007-3 linux-lowlatency, linux-lowlatency-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7029-1 linux-hwe-6.8 Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7005-1 linux-nvidia, linux-nvidia-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7006-1 linux-iot vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7004-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7005-2 linux-nvidia-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7008-1 linux-lowlatency-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7019-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6999-2 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7007-2 linux-ibm-5.15, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7003-1 linux, linux-aws, linux-azure, linux-bluefield, linux-gcp, linux-gkeop, linux-ibm, linux-kvm, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7003-5 linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7003-3 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-7003-4 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- RHSA-2024:5101 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- USN-7009-2 linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Aug 6, 2026
- DLA-4008-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5731-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5730-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2024-1913 Red Hat OpenShift Container Platform: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 3, 2026
- ICSA-25-226-07 Siemens Third-Party Components in SINEC OS CISA ICS & IT advisories · Feb 25, 2026
- SSA-355557 SSA-355557: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.2 Siemens ProductCERT · Feb 24, 2026
- RXSA-2024:5101 Important: kernel security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:5101 Important: kernel security update Rocky Linux Security Advisories · Feb 5, 2026
- WID-SEC-2025-0612 IBM Security Guardium: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 20, 2025
- ELSA-2024-12779 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 11, 2024
- ELSA-2024-12618 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 12, 2024
- ELSA-2024-12612 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 11, 2024
- ELSA-2024-12610 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 10, 2024
- ELSA-2024-5101 Important: kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 8, 2024
References
- https://git.kernel.org/stable/c/acf2b80c31c37acab040baa3cf5f19fbd5140b18
- https://git.kernel.org/stable/c/19c166ee42cf16d8b156a6cb4544122d9a65d3ca
- https://git.kernel.org/stable/c/a8c988d752b3d98d5cc1e3929c519a55ef55426c
- https://git.kernel.org/stable/c/262e942ff5a839b9e4f3302a8987928b0c8b8a2d
- https://git.kernel.org/stable/c/8aa11aa001576bf3b00dcb8559564ad7a3113588
- https://git.kernel.org/stable/c/3ad0034910a57aa88ed9976b1431b7b8c84e0048
- https://git.kernel.org/stable/c/aa6107dcc4ce9a3451f2d729204713783b657257
- https://git.kernel.org/stable/c/ff2e185cf73df480ec69675936c4ee75a445c3e4