🛡️ CVE-2026-46176 on Ubuntu — linux
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init() mlx5_ib_dev_res_srq_init() allocates two SRQs, s0 and s1. When ib_create_srq() fails for s1, the error branch destroys s0 but falls through and unconditionally assigns the freed s0 and the ERR_PTR s1 to devr->s0 and devr->s1. This leads to several problems: the lock-free fast path checks "if (devr->s1) return 0;" and treats the ERR_PTR as already initialised; users in mlx5_ib_create_qp() dereference the freed SRQ or ERR_PTR via to_msrq(devr->s0)->msrq.srqn; and mlx5_ib_dev_res_cleanup() dereferences the ERR_PTR and double-frees s0 on teardown. Fix by adding the same goto unlock in the s1 failure path.
Distribution advisory
This page covers CVE-2026-46176 as tracked by Ubuntu, for the package linux. The fix is available in version 7.0.0-28.28; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is high, 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 high, availability high.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack vector: Local — a local account, shell or session on the host is needed.
- Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
- Privileges required: Low — an ordinary user account is enough.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: High — total loss, or loss the attacker controls.
- Integrity impact: High — total loss, or loss the attacker controls.
- Availability impact: High — total loss, or loss the attacker controls.
Affected software
UBUNTU-CVE-2026-46176 is recorded against 134 packages.
- linux (fixed in 7.0.0-28.28)
- linux-allwinner-5.19
- linux-aws (fixed in 7.0.0-1009.9)
- linux-aws-5.0
- linux-aws-5.11
- linux-aws-5.13
- linux-aws-5.19
- linux-aws-5.3
- linux-aws-5.8
- linux-aws-6.14
- linux-aws-6.17
- linux-aws-6.2
- linux-aws-6.5
- linux-aws-6.8 (fixed in 6.8.0-1061.64~22.04.1)
- linux-aws-fips (fixed in 6.8.0-1061.64+fips1)
- linux-azure (fixed in 7.0.0-1010.10)
- linux-azure-5.11
- linux-azure-5.13
- linux-azure-5.19
- linux-azure-5.3
- linux-azure-5.8
- linux-azure-6.11
- linux-azure-6.14
- linux-azure-6.17
Show the remaining 110 packages
- linux-azure-6.2
- linux-azure-6.5
- linux-azure-6.8 (fixed in 6.8.0-1063.71~22.04.1)
- linux-azure-edge
- linux-azure-fde (fixed in 7.0.0-1009.9)
- linux-azure-fde-5.19
- linux-azure-fde-6.14
- linux-azure-fde-6.2
- linux-azure-fde-6.8 (fixed in 6.8.0-1062.69~22.04.1)
- linux-azure-fips (fixed in 6.8.0-1063.71+fips2)
- linux-azure-nvidia
- linux-azure-nvidia-6.14
- linux-bluefield
- linux-fips (fixed in 6.8.0-136.136+fips2)
- linux-gcp (fixed in 7.0.0-1008.8)
- linux-gcp-5.11
- linux-gcp-5.13
- linux-gcp-5.19
- linux-gcp-5.3
- linux-gcp-5.8
- linux-gcp-6.11
- linux-gcp-6.14
- linux-gcp-6.17
- linux-gcp-6.2
- linux-gcp-6.5
- linux-gcp-6.8 (fixed in 6.8.0-1064.72~22.04.1)
- linux-gcp-fips (fixed in 6.8.0-1064.72+fips1)
- linux-gke (fixed in 7.0.0-1003.4)
- linux-gke-4.15
- linux-gke-5.15
- linux-gke-5.4
- linux-gkeop (fixed in 6.8.0-1046.50)
- linux-gkeop-5.15
- linux-gkeop-5.4
- linux-hwe
- linux-hwe-5.11
- linux-hwe-5.13
- linux-hwe-5.19
- linux-hwe-5.8
- linux-hwe-6.11
- linux-hwe-6.14
- linux-hwe-6.17
- linux-hwe-6.2
- linux-hwe-6.5
- linux-hwe-6.8 (fixed in 6.8.0-136.136~22.04.1)
- linux-hwe-7.0 (fixed in 7.0.0-28.28~24.04.1)
- linux-hwe-edge
- linux-ibm (fixed in 7.0.0-1010.10)
- linux-ibm-6.8 (fixed in 6.8.0-1061.62~22.04.1)
- linux-intel-5.13
- linux-intel-iot-realtime
- linux-lowlatency (fixed in 6.8.0-136.136.2)
- linux-lowlatency-hwe-5.19
- linux-lowlatency-hwe-6.11
- linux-lowlatency-hwe-6.2
- linux-lowlatency-hwe-6.5
- linux-lowlatency-hwe-6.8 (fixed in 6.8.0-136.136.2~22.04.1)
- linux-nvidia
- linux-nvidia-6.11
- linux-nvidia-6.17
- linux-nvidia-6.2
- linux-nvidia-6.5
- linux-nvidia-6.8 (fixed in 6.8.0-1059.62~22.04.1)
- linux-nvidia-7.0
- linux-nvidia-bos
- linux-nvidia-lowlatency (fixed in 6.8.0-1059.62.1)
- linux-nvidia-tegra (fixed in 6.8.0-1030.31)
- linux-oem
- linux-oem-5.10
- linux-oem-5.13
- linux-oem-5.14
- linux-oem-5.17
- linux-oem-5.6
- linux-oem-6.0
- linux-oem-6.1
- linux-oem-6.11
- linux-oem-6.14
- linux-oem-6.17
- linux-oem-6.5
- linux-oem-6.8
- linux-oem-7.0 (fixed in 7.0.0-1009.9)
- linux-oracle (fixed in 7.0.0-1008.8)
- linux-oracle-5.0
- linux-oracle-5.11
- linux-oracle-5.13
- linux-oracle-5.3
- linux-oracle-5.8
- linux-oracle-6.14
- linux-oracle-6.17
- linux-oracle-6.5
- linux-oracle-6.8 (fixed in 6.8.0-1058.61~22.04.1)
- linux-raspi (fixed in 7.0.0-1015.15)
- linux-raspi-realtime
- linux-raspi2
- linux-realtime (fixed in 7.0.0-28.28.1)
- linux-realtime-6.14
- linux-realtime-6.17
- linux-realtime-6.8 (fixed in 6.8.1-1056.57~22.04.2)
- linux-riscv (fixed in 7.0.0-28.28.1)
- linux-riscv-5.11
- linux-riscv-5.19
- linux-riscv-5.8
- linux-riscv-6.14
- linux-riscv-6.17
- linux-riscv-6.5
- linux-riscv-6.8 (fixed in 6.8.0-136.136~22.04.3)
- linux-starfive-5.19
- linux-starfive-6.2
- linux-starfive-6.5
- linux-xilinx (fixed in 6.8.0-1033.34)
Timeline and source
Published on 28 May 2026 and last revised on 18 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
www.cve.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (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)
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)
Other advisories for this package
linux has other advisories on record. If you are patching this one, these are worth checking on the same host:
- DEBIAN-CVE-2022-4994 (published 30 Jul 2026)
- CVE-2026-21996 (3.3 Low, published 1 May 2026)
- CVE-2026-35233 (4.4 Medium, published 1 May 2026)
- CVE-2026-21991 (5.5 Medium, published 16 Mar 2026)
- CGA-mcwh-q4vm-9f29 (published 29 Jan 2026)
- CGA-w6xv-3fg4-grm5 (published 29 Jan 2026)
- CGA-8g9q-8gf4-cpvx (published 7 Jan 2026)
- CGA-mmpc-6qgc-qpqh (published 7 Jan 2026)
CVE-2026-46176 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:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 7.0.0-28.28 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 7.0.0-1009.9 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.8 | — | — |
| linux-aws-6.14 | — | — |
| linux-aws-6.17 | — | — |
| linux-aws-6.2 | — | — |
| linux-aws-6.5 | — | — |
| linux-aws-6.8 | — | 6.8.0-1061.64~22.04.1 |
| linux-aws-fips | — | 6.8.0-1061.64+fips1 |
| linux-azure | — | 7.0.0-1010.10 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.8 | — | — |
| linux-azure-6.11 | — | — |
| linux-azure-6.14 | — | — |
| linux-azure-6.17 | — | — |
| linux-azure-6.2 | — | — |
| linux-azure-6.5 | — | — |
| linux-azure-6.8 | — | 6.8.0-1063.71~22.04.1 |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 7.0.0-1009.9 |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fde-6.14 | — | — |
| linux-azure-fde-6.2 | — | — |
| linux-azure-fde-6.8 | — | 6.8.0-1062.69~22.04.1 |
| linux-azure-fips | — | 6.8.0-1063.71+fips2 |
| linux-azure-nvidia | — | — |
| linux-azure-nvidia-6.14 | — | — |
| linux-bluefield | — | — |
| linux-fips | — | 6.8.0-136.136+fips2 |
| linux-gcp | — | 7.0.0-1008.8 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.11 | — | — |
| linux-gcp-6.14 | — | — |
| linux-gcp-6.17 | — | — |
| linux-gcp-6.2 | — | — |
| linux-gcp-6.5 | — | — |
| linux-gcp-6.8 | — | 6.8.0-1064.72~22.04.1 |
| linux-gcp-fips | — | 6.8.0-1064.72+fips1 |
| linux-gke | — | 7.0.0-1003.4 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 6.8.0-1046.50 |
| linux-gkeop-5.15 | — | — |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.11 | — | — |
| linux-hwe-6.14 | — | — |
| linux-hwe-6.17 | — | — |
| linux-hwe-6.2 | — | — |
| linux-hwe-6.5 | — | — |
| linux-hwe-6.8 | — | 6.8.0-136.136~22.04.1 |
| linux-hwe-7.0 | — | 7.0.0-28.28~24.04.1 |
| linux-hwe-edge | — | — |
| linux-ibm | — | 7.0.0-1010.10 |
| linux-ibm-6.8 | — | 6.8.0-1061.62~22.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | — |
| linux-lowlatency | — | 6.8.0-136.136.2 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.11 | — | — |
| linux-lowlatency-hwe-6.2 | — | — |
| linux-lowlatency-hwe-6.5 | — | — |
| linux-lowlatency-hwe-6.8 | — | 6.8.0-136.136.2~22.04.1 |
| linux-nvidia | — | — |
| linux-nvidia-6.11 | — | — |
| linux-nvidia-6.17 | — | — |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-6.5 | — | — |
| linux-nvidia-6.8 | — | 6.8.0-1059.62~22.04.1 |
| linux-nvidia-7.0 | — | — |
| linux-nvidia-bos | — | — |
| linux-nvidia-lowlatency | — | 6.8.0-1059.62.1 |
| linux-nvidia-tegra | — | 6.8.0-1030.31 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.17 | — | — |
| linux-oem-5.6 | — | — |
| linux-oem-6.0 | — | — |
| linux-oem-6.1 | — | — |
| linux-oem-6.11 | — | — |
| linux-oem-6.14 | — | — |
| linux-oem-6.17 | — | — |
| linux-oem-6.5 | — | — |
| linux-oem-6.8 | — | — |
| linux-oem-7.0 | — | 7.0.0-1009.9 |
| linux-oracle | — | 7.0.0-1008.8 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.8 | — | — |
| linux-oracle-6.14 | — | — |
| linux-oracle-6.17 | — | — |
| linux-oracle-6.5 | — | — |
| linux-oracle-6.8 | — | 6.8.0-1058.61~22.04.1 |
| linux-raspi | — | 7.0.0-1015.15 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | 7.0.0-28.28.1 |
| linux-realtime-6.14 | — | — |
| linux-realtime-6.17 | — | — |
| linux-realtime-6.8 | — | 6.8.1-1056.57~22.04.2 |
| linux-riscv | — | 7.0.0-28.28.1 |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-riscv-6.14 | — | — |
| linux-riscv-6.17 | — | — |
| linux-riscv-6.5 | — | — |
| linux-riscv-6.8 | — | 6.8.0-136.136~22.04.3 |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | — |
| linux-starfive-6.5 | — | — |
| linux-xilinx | — | 6.8.0-1033.34 |
References
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