Description
In the Linux kernel, the following vulnerability has been resolved:
misc: fastrpc: avoid double fput() on failed usercopy
If the copy back to userland fails for the FASTRPC_IOCTL_ALLOC_DMA_BUFF
ioctl(), we shouldn't assume that 'buf->dmabuf' is still valid. In fact,
dma_buf_fd() called fd_install() before, i.e. "consumed" one reference,
leaving us with none.
Calling dma_buf_put() will therefore put a reference we no longer own,
leading to a valid file descritor table entry for an already released
'file' object which is a straight use-after-free.
Simply avoid calling dma_buf_put() and rely on the process exit code to
do the necessary cleanup, if needed, i.e. if the file descriptor is
still valid.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.1 | 5.4.180 |
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 | 5.16.10-1 | — |
| Debian 13 | linux | 5.16.10-1 | — |
| Debian 12 | linux | 5.16.10-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +25 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-110.124 | — |
| Ubuntu 20.04 LTS | linux-aws +1 | 5.4.0-1073.78 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1078.81 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1040.44 | — |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1040.41 | — |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1021.23 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1008.11~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1004.6 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1063.66 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1071.77 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1060.68 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1075.80~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1078.81~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1073.78~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-110.124~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-ibm-5.4 | 5.4.0-1021.23~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1071.77~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1060.68~18.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips +1 | 5.4.0-1073.78+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1078.81+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1049.55 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +5 | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.63.1 | SUSE-SU-2024:2947-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.73.1.150500.6.33.8 | SUSE-SU-2024:2939-1 |
| SLES 15 SP5 | kernel-docs | 5.14.21-150500.55.73.2 | SUSE-SU-2024:2939-1 |
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.128.1 | SUSE-SU-2024:2929-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.128.1.150400.24.62.1 | SUSE-SU-2024:2929-1 |
| SLES 15 SP3 | kernel-64kb +6 | 5.3.18-150300.59.170.1 | SUSE-SU-2024:2948-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.170.1.150300.18.100.1 | SUSE-SU-2024:2948-1 |
| SLES 15 SP3 | kernel-docs | 5.3.18-150300.59.170.2 | SUSE-SU-2024:2948-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-150200.24.200.1.150200.9.103.1 | SUSE-SU-2024:2923-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.200.1 | SUSE-SU-2024:2923-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | kernel-default-base | 5.14.21-150400.24.128.1.150400.24.62.1 | SUSE-SU-2024:2929-1 |
| SLES for SAP 15 SP4 | kernel-docs +4 | 5.14.21-150400.24.128.1 | SUSE-SU-2024:2929-1 |
| SLES for SAP 15 SP3 | kernel-default-base | 5.3.18-150300.59.170.1.150300.18.100.1 | SUSE-SU-2024:2948-1 |
| SLES for SAP 15 SP3 | kernel-docs | 5.3.18-150300.59.170.2 | SUSE-SU-2024:2948-1 |
| SLES for SAP 15 SP3 | kernel-syms +4 | 5.3.18-150300.59.170.1 | SUSE-SU-2024:2948-1 |
| SLES for SAP 15 SP2 | kernel-default-base | 5.3.18-150200.24.200.1.150200.9.103.1 | SUSE-SU-2024:2923-1 |
| SLES for SAP 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.200.1 | SUSE-SU-2024:2923-1 |
| SLE Micro 5.5 | kernel-default | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.73.1.150500.6.33.8 | SUSE-SU-2024:2939-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.64.1 | SUSE-SU-2024:2894-1 |
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.128.1 | SUSE-SU-2024:2929-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.128.1.150400.24.62.1 | SUSE-SU-2024:2929-1 |
| SLE Micro 5.4 | kernel-rt +1 | 5.14.21-150400.15.88.1 | SUSE-SU-2024:2902-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.128.1 | SUSE-SU-2024:2929-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.128.1.150400.24.62.1 | SUSE-SU-2024:2929-1 |
| SLE Micro 5.3 | kernel-rt +1 | 5.14.21-150400.15.88.1 | SUSE-SU-2024:2902-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.170.1 | SUSE-SU-2024:2948-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.170.1.150300.18.100.1 | SUSE-SU-2024:2948-1 |
| SLE Micro 5.2 | kernel-rt +1 | 5.3.18-150300.178.1 | SUSE-SU-2024:2893-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.170.1 | SUSE-SU-2024:2948-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.170.1.150300.18.100.1 | SUSE-SU-2024:2948-1 |
| SLE Micro 5.1 | kernel-rt +1 | 5.3.18-150300.178.1 | SUSE-SU-2024:2893-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_17 +1 | 1-150500.11.3.1 | SUSE-SU-2024:2939-1, SUSE-SU-2024:2894-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.128.1 | SUSE-SU-2024:2929-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_29 | 1-150400.9.3.1 | SUSE-SU-2024:2929-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.170.1 | SUSE-SU-2024:2948-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_47 | 1-150300.7.3.1 | SUSE-SU-2024:2948-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-150200.24.200.1 | SUSE-SU-2024:2923-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_51 | 1-150200.5.3.1 | SUSE-SU-2024:2923-1 |
| SLE HPC 15 SP4 | kernel-64kb +5 | 5.14.21-150400.24.128.1 | SUSE-SU-2024:2929-1 |
| SLE HPC 15 SP4 | kernel-default-base | 5.14.21-150400.24.128.1.150400.24.62.1 | SUSE-SU-2024:2929-1 |
| SLE HPC 15 SP3 | kernel-64kb +5 | 5.3.18-150300.59.170.1 | SUSE-SU-2024:2948-1 |
| SLE HPC 15 SP3 | kernel-default-base | 5.3.18-150300.59.170.1.150300.18.100.1 | SUSE-SU-2024:2948-1 |
| SLE HPC 15 SP3 | kernel-docs | 5.3.18-150300.59.170.2 | SUSE-SU-2024:2948-1 |
| SLE HPC 15 SP2 | kernel-default-base | 5.3.18-150200.24.200.1.150200.9.103.1 | SUSE-SU-2024:2923-1 |
| SLE HPC 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.200.1 | SUSE-SU-2024:2923-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.64.1 | SUSE-SU-2024:2894-1 |
| SUSE Manager Server 4.3 | kernel-default-base | 5.14.21-150400.24.128.1.150400.24.62.1 | SUSE-SU-2024:2929-1 |
| SUSE Manager Server 4.3 | kernel-syms +3 | 5.14.21-150400.24.128.1 | SUSE-SU-2024:2929-1 |
| SUSE Manager Proxy 4.3 | kernel-default-base | 5.14.21-150400.24.128.1.150400.24.62.1 | SUSE-SU-2024:2929-1 |
| SUSE Manager Proxy 4.3 | kernel-syms +2 | 5.14.21-150400.24.128.1 | SUSE-SU-2024:2929-1 |
| SUSE Enterprise Storage 7.1 | kernel-64kb +5 | 5.3.18-150300.59.170.1 | SUSE-SU-2024:2948-1 |
| SUSE Enterprise Storage 7.1 | kernel-default-base | 5.3.18-150300.59.170.1.150300.18.100.1 | SUSE-SU-2024:2948-1 |
| SUSE Enterprise Storage 7.1 | kernel-docs | 5.3.18-150300.59.170.2 | SUSE-SU-2024:2948-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | dtb-aarch64 +9 | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.63.1 | SUSE-SU-2024:2947-1 |
| openSUSE Leap 15.5 | kernel-default-base | 5.14.21-150500.55.73.1.150500.6.33.8 | SUSE-SU-2024:2939-1 |
| openSUSE Leap 15.5 | kernel-docs | 5.14.21-150500.55.73.2 | SUSE-SU-2024:2939-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.64.1 | SUSE-SU-2024:2894-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.5 | kernel-default | 5.14.21-150500.55.73.1 | SUSE-SU-2024:2939-1 |
| openSUSE Leap Micro 5.5 | kernel-default-base | 5.14.21-150500.55.73.1.150500.6.33.8 | SUSE-SU-2024:2939-1 |
| openSUSE Leap Micro 5.5 | kernel-rt | 5.14.21-150500.13.64.1 | SUSE-SU-2024:2894-1 |
Advisories 9
- WID-SEC-2024-1625 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 27, 2026
- SUSE-SU-2024:2947-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2923-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2939-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2893-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2902-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2929-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2894-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2024:2948-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
References
- https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215
- https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5
- https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d
- https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc
- https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34