Description
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix potential UAF after skb_unshare() failure
If skb_unshare() fails to unshare a packet due to allocation failure in
rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread())
will be NULL'd out. This will likely cause the call to
trace_rxrpc_rx_done() to oops.
Fix this by moving the unsharing down to where rxrpc_input_call_event()
calls rxrpc_input_call_packet(). There are a number of places prior to
that where we ignore DATA packets for a variety of reasons (such as the
call already being complete) for which an unshare is then avoided.
And with that, rxrpc_input_packet() doesn't need to take a pointer to the
pointer to the packet, so change that to just a pointer.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.2 | 6.6.140 |
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 | 7.0.4-1 | — |
| Debian 13 | linux | 6.12.86-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 24.04 LTS | linux-bluefield | 6.8.0-1023.27 | — |
| Ubuntu 26.04 LTS | linux | 7.0.0-22.22 | USN-8370-1 |
| Ubuntu 26.04 LTS | linux-aws +1 | 7.0.0-1006.6 | USN-8370-1 |
| Ubuntu 26.04 LTS | linux-gcp +1 | 7.0.0-1005.5 | USN-8370-1 |
| Ubuntu 26.04 LTS | linux-ibm +1 | 7.0.0-1007.7 | USN-8461-1, USN-8370-1 |
| Ubuntu 26.04 LTS | linux-nvidia | 7.0.0-1009.9 | USN-8370-1 |
| Ubuntu 26.04 LTS | linux-oem-7.0 | 7.0.0-1008.8 | USN-8489-1 |
| Ubuntu 26.04 LTS | linux-raspi | 7.0.0-1011.11 | USN-8370-1 |
| Ubuntu 26.04 LTS | linux-riscv +1 | 7.0.0-22.22.1 | USN-8370-1 |
| Ubuntu 25.10 | linux | 6.17.0-35.35 | USN-8371-1 |
| Ubuntu 25.10 | linux-aws +1 | 6.17.0-1017.17 | USN-8371-1 |
| Ubuntu 25.10 | linux-azure-fde | No fix yet | — |
| Ubuntu 25.10 | linux-gcp | 6.17.0-1018.19 | USN-8374-1 |
| Ubuntu 25.10 | linux-oracle | 6.17.0-1016.16 | USN-8371-1 |
| Ubuntu 25.10 | linux-raspi | 6.17.0-1018.18 | USN-8371-1 |
| Ubuntu 25.10 | linux-realtime | 6.17.0-1014.16 | USN-8371-1 |
| Ubuntu 25.10 | linux-riscv | 6.17.0-35.35.1 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-124.124 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1057.60 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-aws-6.17 +1 | 6.17.0-1017.17~24.04.1 | USN-8374-1, USN-8371-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1058.64 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-azure-fde | 6.8.0-1058.65 | — |
| Ubuntu 24.04 LTS | linux-azure-nvidia | 6.8.0-1039.42 | — |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1060.63 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-gcp-6.17 | 6.17.0-1018.19~24.04.1 | USN-8374-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1055.61 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1042.45 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-hwe-6.17 | 6.17.0-35.35~24.04.1 | USN-8371-1 |
| Ubuntu 24.04 LTS | linux-hwe-7.0 | 7.0.0-28.28~24.04.1 | USN-8569-1 |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1057.58 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-lowlatency | 6.8.0-134.134.1 | USN-8497-1 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1055.58 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-nvidia-6.17 | 6.17.0-1021.21 | USN-8371-1 |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1055.58.1 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-nvidia-tegra | 6.8.0-1026.26 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-oem-6.17 | 6.17.0-1024.24 | USN-8371-1 |
| Ubuntu 24.04 LTS | linux-oracle | 6.8.0-1054.55 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-oracle-6.17 | 6.17.0-1016.16~24.04.1 | USN-8371-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1057.61 | USN-8373-1 |
| Ubuntu 24.04 LTS | linux-riscv +18 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-riscv-6.17 | 6.17.0-35.35.1~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-xilinx | 6.8.0-1032.33 | USN-8499-1 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1057.60~22.04.1 | USN-8373-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1059.65~22.04.1 | USN-8440-1 |
| Ubuntu 22.04 LTS | linux-azure-fde-6.8 | 6.8.0-1058.65~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1060.63~22.04.1 | USN-8373-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 +1 | 6.8.0-124.124~22.04.1 | USN-8373-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1057.58~22.04.1 | USN-8373-1 |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-6.8 | 6.8.0-134.134.1~22.04.1 | USN-8497-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1055.58~22.04.1 | USN-8373-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1054.55~22.04.1 | USN-8373-1 |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2046.47 | USN-8373-1 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1052.53 | USN-8373-1 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.14 | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.17 | 6.17.0-1014.16~24.04.1 | USN-8371-1 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1052.53~22.04.1 | USN-8373-1 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-aws-fips | 6.8.0-1057.60+fips1 | USN-8373-1 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-azure-fips | 6.8.0-1059.65+fips1 | USN-8393-1 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-124.124+fips1 | USN-8373-1 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-gcp-fips | 6.8.0-1060.63+fips1 | USN-8373-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | rv +76 | 6.12.0-211.30.1.el10_2 | RHSA-2026:34911 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | rv +77 | 6.12.0-55.98.1.el10_0 | RHSA-2026:55445 |
| RHEL 9.6 EUS | rv +77 | 5.14.0-570.140.1.el9_6 | RHSA-2026:65708 |
| RHEL 9.4 E4S | bpftool | 7.3.0-427.149.1.el9_4 | RHSA-2026:65712 |
| RHEL 9.4 E4S | rv +62 | 5.14.0-427.149.1.el9_4 | RHSA-2026:65712 |
| RHEL 9.2 E4S | bpftool | 7.0.0-284.191.1.el9_2 | RHSA-2026:67723 |
| RHEL 9.2 E4S | kernel-rt +14 | 5.14.0-284.191.1.rt14.476.el9_2 | RHSA-2026:67721 |
| RHEL 9.2 E4S | perf +47 | 5.14.0-284.191.1.el9_2 | RHSA-2026:67723 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | rv +74 | 6.12.0-211.30.1.el10_2 | ALSA-2026:34911 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 7.0.11-1.1 | openSUSE-SU-2026:10954-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kernel | 6.6.141.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | rv +29 | 6.12.0-211.34.1.el10_2 | ELSA-2026-34911 |
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-204.92.4.2.el10uek | ELSA-2026-50372 |
Advisories 22
- WID-SEC-2026-1700 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- USN-8569-1 linux-hwe-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8373-1 linux, linux-aws, linux-aws-6.8, linux-aws-fips, linux-azure, linux-fips, linux-gcp, linux-gcp-6.8, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-6.8, linux-ibm, linux-ibm-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-nvidia-tegra, linux-oracle, linux-oracle-6.8, linux-raspi, linux-raspi-realtime, linux-realtime, linux-realtime-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8461-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8489-1 linux-oem-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8440-1 linux-azure-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8371-1 linux, linux-aws, linux-azure, linux-azure-6.17, linux-hwe-6.17, linux-nvidia-6.17, linux-oem-6.17, linux-oracle, linux-oracle-6.17, linux-raspi, linux-realtime, linux-realtime-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8370-1 linux, linux-aws, linux-gcp, linux-ibm, linux-nvidia, linux-oracle, linux-raspi, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8374-1 linux-aws-6.17, linux-gcp, linux-gcp-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8497-1 linux-lowlatency, linux-lowlatency-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8499-1 linux-xilinx vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8393-1 linux-azure-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- ALSA-2026:34911 Important: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:67723 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:67721 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:65712 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:65708 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:34911 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2026:55445 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- ELSA-2026-34911 Important: kernel security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Aug 10, 2026
- ELSA-2026-50372 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 2, 2026
- openSUSE-SU-2026:10954-1 kernel-devel-7.0.11-1.1 on GA media SUSE / openSUSE Security Updates · Jun 5, 2026
References
- https://git.kernel.org/stable/c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c
- https://git.kernel.org/stable/c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495
- https://git.kernel.org/stable/c/996b0487b3cdda4c91811dbb1c9564626bc840bd
- https://git.kernel.org/stable/c/8fde6296c4d4da2be7ab761305ab7f232b94eefd
- https://git.kernel.org/stable/c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8