Description
In the Linux kernel, the following vulnerability has been resolved:
blk_iocost: fix more out of bound shifts
Recently running UBSAN caught few out of bound shifts in the
ioc_forgive_debts() function:
UBSAN: shift-out-of-bounds in block/blk-iocost.c:2142:38
shift exponent 80 is too large for 64-bit type 'u64' (aka 'unsigned long
long')
...
UBSAN: shift-out-of-bounds in block/blk-iocost.c:2144:30
shift exponent 80 is too large for 64-bit type 'u64' (aka 'unsigned long
long')
...
Call Trace:
<IRQ>
dump_stack_lvl+0xca/0x130
__ubsan_handle_shift_out_of_bounds+0x22c/0x280
? __lock_acquire+0x6441/0x7c10
ioc_timer_fn+0x6cec/0x7750
? blk_iocost_init+0x720/0x720
? call_timer_fn+0x5d/0x470
call_timer_fn+0xfa/0x470
? blk_iocost_init+0x720/0x720
__run_timer_base+0x519/0x700
...
Actual impact of this issue was not identified but I propose to fix the
undefined behaviour.
The proposed fix to prevent those out of bound shifts consist of
precalculating exponent before using it the shift operations by taking
min value from the actual exponent and maximum possible number of bits.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.10 | 5.10.227 |
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 | 6.11.4-1 | — |
| Debian 13 | linux | 6.11.4-1 | — |
| Debian 12 | linux | 6.1.115-1 | — |
| Debian 11 | linux | 5.10.234-1 | DLA-4075-1 |
| 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 | 5.15.0-1057.59 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-54.56 | USN-7301-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1023.25 | USN-7311-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1025.30 | USN-7384-1 |
| Ubuntu 24.04 LTS | linux-azure-6.11 | 6.11.0-1012.12~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-azure-nvidia | 6.8.0-1014.15 | USN-7468-1 |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1024.26 | USN-7304-1 |
| Ubuntu 24.04 LTS | linux-gcp-6.11 | 6.11.0-1011.11~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-gke +1 | 6.8.0-1019.23 | USN-7304-1, USN-7303-3 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1006.8 | USN-7304-1 |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1022.22 | USN-7385-1 |
| Ubuntu 24.04 LTS | linux-lowlatency | 6.8.0-54.56.1 | USN-7301-1 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1022.25 | USN-7303-1 |
| Ubuntu 24.04 LTS | linux-nvidia-6.11 | 6.11.0-1007.7 | — |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1022.25.2 | USN-7303-1 |
| Ubuntu 24.04 LTS | linux-oem-6.11 | 6.11.0-1015.15 | USN-7310-1 |
| Ubuntu 24.04 LTS | linux-oem-6.8 | 6.8.0-1024.24 | USN-7386-1 |
| Ubuntu 24.04 LTS | linux-oracle | 6.8.0-1020.21 | USN-7303-2 |
| Ubuntu 24.04 LTS | linux-realtime | No fix yet | — |
| Ubuntu 24.04 LTS | linux-riscv | 6.8.0-53.55.1 | — |
| Ubuntu 24.04 LTS | linux-xilinx | 6.8.0-1017.18 | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-127.137 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1073.79 | USN-7166-2 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1023.25~22.04.1 | USN-7311-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1078.87 | USN-7186-2 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1025.30~22.04.1 | USN-7384-2 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1078.87.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1072.80 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1024.26~22.04.1 | USN-7303-3 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1070.76 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1056.63 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-57.59~22.04.1 | USN-7403-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1066.69 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1023.23~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1070.75 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-6.8 | 6.8.0-54.56.1~22.04.1 | USN-7301-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1068.69 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1022.25~22.04.2 | USN-7303-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1032.32 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1020.20 | — |
| Ubuntu 22.04 LTS | linux-oracle +1 | 5.15.0-1071.77 | USN-7186-1, USN-7166-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1020.21~22.04.1 | USN-7303-2 |
| Ubuntu 22.04 LTS | linux-riscv +31 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 | 6.8.0-53.55.1~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1039.43 | USN-7166-4 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1073.79~20.04.1 | USN-7166-2 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1078.87~20.04.1 | USN-7194-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1072.80~20.04.1 | USN-7166-1 |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-127.137~20.04.1 | USN-7166-3, USN-7166-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1066.69~20.04.1 | USN-7166-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1032.32~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 +1 | 5.15.0-1071.77~20.04.1 | USN-7186-2, USN-7166-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1069.73~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 6 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 | 6.8.0-2018.19 | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1016.17 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1066.68 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1074.82 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1016.17~22.04.1 | — |
| 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 | 5.15.0-1073.79+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1078.87+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-127.137+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1072.80+fips1 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | rv +77 | 5.14.0-570.12.1.el9_6 | RHSA-2025:6966 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | kernel-64kb +6 | 6.4.0-150600.23.30.1 | SUSE-SU-2024:4318-1 |
| SLES 15 SP6 | kernel-azure +2 | 6.4.0-150600.8.20.1 | SUSE-SU-2024:4316-1 |
| SLES 15 SP6 | kernel-coco +3 | 6.4.0-15061.9.coco15sp6.1 | SUSE-SU-2024:4387-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.30.1.150600.12.12.6 | SUSE-SU-2024:4318-1 |
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.88.1 | SUSE-SU-2024:4364-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.72.1 | SUSE-SU-2024:3983-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.88.1.150500.6.39.4 | SUSE-SU-2024:4364-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | kernel-default-base | 6.4.0-24.1.21.4 | SUSE-SU-2025:20247-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0-RT_Update_4 | 1-1.1 | SUSE-SU-2025:20246-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0_Update_4 | 1-1.2 | SUSE-SU-2025:20247-1 |
| SLE Micro 6.1 | kernel-rt +1 | 6.4.0-22.1 | SUSE-SU-2025:20246-1 |
| SLE Micro 6.1 | kernel-source +2 | 6.4.0-24.1 | SUSE-SU-2025:20247-1 |
| SLE Micro 6.0 | kernel-default-base | 6.4.0-24.1.21.4 | SUSE-SU-2025:20164-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0-RT_Update_4 | 1-1.1 | SUSE-SU-2025:20163-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_4 | 1-1.2 | SUSE-SU-2025:20164-1 |
| SLE Micro 6.0 | kernel-rt +1 | 6.4.0-22.1 | SUSE-SU-2025:20163-1 |
| SLE Micro 6.0 | kernel-source +2 | 6.4.0-24.1 | SUSE-SU-2025:20164-1 |
| SLE Micro 5.5 | kernel-default | 5.14.21-150500.55.88.1 | SUSE-SU-2024:4364-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.88.1.150500.6.39.4 | SUSE-SU-2024:4364-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.76.1 | SUSE-SU-2024:3985-1 |
| SLE Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.30.1 | SUSE-SU-2024:4318-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_6 | 1-150600.1.3.1 | SUSE-SU-2024:4314-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_6 | 1-150600.13.3.5 | SUSE-SU-2024:4318-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.88.1 | SUSE-SU-2024:4364-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_22 | 1-150500.11.3.1 | SUSE-SU-2024:3985-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_21 | 1-150500.11.5.1 | SUSE-SU-2024:4364-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.20.1 | SUSE-SU-2024:4314-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.76.1 | SUSE-SU-2024:3985-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 6.11.8-1.1 | openSUSE-SU-2024:14500-1 |
| openSUSE Tumbleweed | kernel-source-longterm | 6.12.11-1.1 | openSUSE-SU-2025:14705-1 |
| openSUSE Leap 15.6 | dtb-aarch64 +10 | 6.4.0-150600.23.30.1 | SUSE-SU-2024:4318-1 |
| openSUSE Leap 15.6 | kernel-azure +2 | 6.4.0-150600.8.20.1 | SUSE-SU-2024:4316-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.30.1.150600.12.12.6 | SUSE-SU-2024:4318-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.20.1 | SUSE-SU-2024:4314-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.72.1 | SUSE-SU-2024:3983-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.76.1 | SUSE-SU-2024:3985-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.5 | kernel-rt | 5.14.21-150500.13.76.1 | SUSE-SU-2024:3985-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.115-126.197 | 1.0-0.amzn2023 | ALAS2023-2025-794 |
| Amazon Linux 2023 | perf +14 | 6.1.115-126.197.amzn2023 | ALAS2023-2025-794 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.173.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bpftool | 7.5.0-802.el9_6 | ELSA-2025-6966 |
| Oracle Linux 9 | rv +28 | 5.14.0-570.12.1.0.1.el9_6 | ELSA-2025-6966 |
| Oracle Linux 8 | bpftool +13 | 5.15.0-303.171.5.2.el9uek | ELSA-2024-12887 |
Advisories 43
- RHSA-2025:6966 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2024-3251 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 11, 2026
- USN-7468-1 linux-azure-nvidia vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7310-1 linux-oem-6.11 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7384-2 linux-azure-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7384-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7166-1 linux, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7166-3 linux-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7386-1 linux-oem-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7304-1 linux-gcp, linux-gke, linux-gkeop vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7303-1 linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7301-1 linux, linux-lowlatency, linux-lowlatency-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7186-2 linux-azure, linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7403-1 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7194-1 linux-azure-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7166-2 linux-aws, linux-aws-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7303-2 linux-oracle, linux-oracle-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7311-1 linux-aws, linux-aws-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7385-1 linux-ibm vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7303-3 linux-gcp-6.8, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7186-1 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7166-4 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- WID-SEC-2025-2855 IBM DataPower Gateway: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- SUSE-SU-2025:20163-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20246-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20164-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20247-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4008-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4075-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 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
- SUSE-SU-2024:3985-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4318-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4364-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4316-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:14705-1 kernel-devel-longterm-6.12.11-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14500-1 kernel-devel-6.11.8-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4387-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4314-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3983-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2025-794 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 2, 2025
- ELSA-2025-6966 Moderate: kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 16, 2025
- ELSA-2024-12887 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 18, 2024
References
- https://git.kernel.org/stable/c/1f61d509257d6a05763d05bf37943b35306522b1
- https://git.kernel.org/stable/c/f4ef9bef023d5c543cb0f3194ecacfd47ef590ec
- https://git.kernel.org/stable/c/59121bb38fdc01434ea3fe361ee02b59f036227f
- https://git.kernel.org/stable/c/1ab2cfe19700fb3dde4c7dfec392acff34db3120
- https://git.kernel.org/stable/c/1b120f151871eb47ce9f283c007af3f8ae1d990e
- https://git.kernel.org/stable/c/364022095bdd4108efdaaa68576afa4712a5d085
- https://git.kernel.org/stable/c/9bce8005ec0dcb23a58300e8522fe4a31da606fa