Description
In the Linux kernel, the following vulnerability has been resolved:
tcp: Fix use-after-free of nreq in reqsk_timer_handler().
The cited commit replaced inet_csk_reqsk_queue_drop_and_put() with
__inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler().
Then, oreq should be passed to reqsk_put() instead of req; otherwise
use-after-free of nreq could happen when reqsk is migrated but the
retry attempt failed (e.g. due to timeout).
Let's pass oreq to reqsk_put().
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.15.170 – < 5.15.174, 6.1.115 – < 6.1.120, 6.6.59 – < 6.6.64, 6.11.6 – < 6.11.11, 5.4.293 – < 5.5, 5.10.237 – < 5.11, 6.12 | 5.15.174 |
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 | 6.12.3-1 | — |
| Debian 13 | linux | 6.12.3-1 | — |
| Debian 12 | linux | 6.1.123-1 | — |
| Debian 11 | linux-6.1 | 6.1.128-1~deb11u1 | DLA-4076-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1062.64 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-135.146 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1080.87 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1084.93 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1084.93.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1079.88 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1077.83 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1062.70 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1072.75 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1073.75 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1075.81 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1076.81 | USN-7388-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1074.75 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1074.77 | USN-7387-1 |
| Ubuntu 22.04 LTS | linux-riscv +31 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1080.87~20.04.1 | USN-7388-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1086.95~20.04.1 | USN-7421-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1086.95~20.04.1.1 | USN-7421-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1081.90~20.04.1 | USN-7459-2 |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-136.147~20.04.1 | USN-7407-1 |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-135.146~20.04.1 | USN-7387-1 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 +1 | 5.15.0-1077.83~20.04.1 | USN-7459-1, USN-7387-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1075.79~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 3 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 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1073.75 | USN-7387-3 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1080.88 | USN-7387-3 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1080.87+fips1 | USN-7387-2 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1083.92+fips1 | USN-7387-2 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-135.146+fips1 | USN-7387-2 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1079.88+fips1 | USN-7387-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | kernel-64kb +6 | 6.4.0-150600.23.33.1 | SUSE-SU-2025:0154-1 |
| SLES 15 SP6 | kernel-azure +2 | 6.4.0-150600.8.23.1 | SUSE-SU-2025:0117-1 |
| SLES 15 SP6 | kernel-coco +3 | 6.4.0-15061.12.coco15sp6.1 | SUSE-SU-2025:0289-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.33.1.150600.12.14.1 | SUSE-SU-2025:0154-1 |
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.91.1.150500.6.41.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.147.1 | SUSE-SU-2025:0203-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.147.1.150400.24.72.1 | SUSE-SU-2025:0203-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | kernel-default-base | 5.14.21-150500.55.91.1.150500.6.41.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLES for SAP 15 SP5 | kernel-docs +4 | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLES for SAP 15 SP4 | kernel-default-base | 5.14.21-150400.24.147.1.150400.24.72.1 | SUSE-SU-2025:0203-1 |
| SLES for SAP 15 SP4 | kernel-docs +4 | 5.14.21-150400.24.147.1 | SUSE-SU-2025:0203-1 |
| SLE Micro 6.1 | kernel-default-base | 6.4.0-24.1.21.4 | SUSE-SU-2025:20248-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0-RT_Update_5 | 1-1.1 | SUSE-SU-2025:20249-1 |
| SLE Micro 6.1 | kernel-livepatch-MICRO-6-0_Update_5 | 1-1.2 | SUSE-SU-2025:20248-1 |
| SLE Micro 6.1 | kernel-rt +4 | 6.4.0-25.1 | SUSE-SU-2025:20249-1, SUSE-SU-2025:20248-1 |
| SLE Micro 6.0 | kernel-default-base | 6.4.0-24.1.21.4 | SUSE-SU-2025:20165-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0-RT_Update_5 | 1-1.1 | SUSE-SU-2025:20166-1 |
| SLE Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_5 | 1-1.2 | SUSE-SU-2025:20165-1 |
| SLE Micro 6.0 | kernel-rt +4 | 6.4.0-25.1 | SUSE-SU-2025:20166-1, SUSE-SU-2025:20165-1 |
| SLE Micro 5.5 | kernel-default | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.91.1.150500.6.41.1 | SUSE-SU-2025:0201-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.82.1 | SUSE-SU-2025:0229-1 |
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.147.1 | SUSE-SU-2025:0203-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.147.1.150400.24.72.1 | SUSE-SU-2025:0203-1 |
| SLE Micro 5.4 | kernel-rt +1 | 5.14.21-150400.15.106.1 | SUSE-SU-2025:0231-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.147.1 | SUSE-SU-2025:0203-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.147.1.150400.24.72.1 | SUSE-SU-2025:0203-1 |
| SLE Micro 5.3 | kernel-rt +1 | 5.14.21-150400.15.106.1 | SUSE-SU-2025:0231-1 |
| SLE Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.33.1 | SUSE-SU-2025:0154-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_7 | 1-150600.1.3.1 | SUSE-SU-2025:0153-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_7 | 1-150600.13.3.1 | SUSE-SU-2025:0154-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_22 | 1-150500.11.3.1 | SUSE-SU-2025:0201-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.147.1 | SUSE-SU-2025:0203-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_35 | 1-150400.9.3.1 | SUSE-SU-2025:0203-1 |
| SLE HPC 15 SP5 | kernel-64kb +5 | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLE HPC 15 SP5 | kernel-default-base | 5.14.21-150500.55.91.1.150500.6.41.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLE HPC 15 SP4 | kernel-64kb +5 | 5.14.21-150400.24.147.1 | SUSE-SU-2025:0203-1 |
| SLE HPC 15 SP4 | kernel-default-base | 5.14.21-150400.24.147.1.150400.24.72.1 | SUSE-SU-2025:0203-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.23.1 | SUSE-SU-2025:0153-1 |
| SUSE Manager Server 4.3 | kernel-default-base | 5.14.21-150400.24.147.1.150400.24.72.1 | SUSE-SU-2025:0203-1 |
| SUSE Manager Server 4.3 | kernel-syms +3 | 5.14.21-150400.24.147.1 | SUSE-SU-2025:0203-1 |
| SUSE Manager Proxy 4.3 | kernel-default-base | 5.14.21-150400.24.147.1.150400.24.72.1 | SUSE-SU-2025:0203-1 |
| SUSE Manager Proxy 4.3 | kernel-syms +2 | 5.14.21-150400.24.147.1 | SUSE-SU-2025:0203-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | dtb-aarch64 +10 | 6.4.0-150600.23.33.1 | SUSE-SU-2025:0154-1 |
| openSUSE Leap 15.6 | kernel-azure +2 | 6.4.0-150600.8.23.1 | SUSE-SU-2025:0117-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.33.1.150600.12.14.1 | SUSE-SU-2025:0154-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.23.1 | SUSE-SU-2025:0153-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.124-134.200 | 1.0-0.amzn2023 | ALAS2023-2025-809 |
| Amazon Linux 2023 | perf +14 | 6.1.124-134.200.amzn2023 | ALAS2023-2025-809 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.176.3-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-101.33.4.3.el10uek | ELSA-2025-20530, ELSA-2025-20480 |
| Oracle Linux 8 | bpftool +13 | 5.15.0-304.171.4.el9uek | ELSA-2025-20018 |
Advisories 27
- WID-SEC-2024-3762 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 10, 2026
- USN-7459-1 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7459-2 linux-gcp-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- USN-7387-1 linux, linux-aws, linux-azure, linux-gcp, linux-gke, linux-gkeop, linux-ibm, linux-intel-iotg, 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-7387-2 linux-fips, linux-aws-fips, linux-azure-fips, linux-gcp-fips vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7387-3 linux-realtime, linux-intel-iot-realtime vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7421-1 linux-azure-5.15, linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7388-1 linux-aws-5.15, linux-kvm vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7407-1 linux-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- SUSE-SU-2025:20165-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20166-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20248-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20249-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4076-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:0117-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0153-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0154-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0203-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0201-2 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0229-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0231-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0289-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2025-809 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 2, 2025
- ELSA-2025-20530 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 18, 2025
- ELSA-2025-20480 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 17, 2025
- SUSE-SU-2025:0201-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Apr 4, 2025
- ELSA-2025-20018 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jan 11, 2025
References
- https://git.kernel.org/stable/c/2dcc86fefe09ac853158afd96b60d544af115dc5
- https://git.kernel.org/stable/c/9a3c1ad93e6fba67b3a637cfa95a57a6685e4908
- https://git.kernel.org/stable/c/65ed89cad1f57034c256b016e89e8c0a4ec7c65b
- https://git.kernel.org/stable/c/d0eb14cb8c08b00c36a3d5dc57a6f428b301f721
- https://git.kernel.org/stable/c/6d845028609a4af0ad66f499ee0bd5789122b067
- https://git.kernel.org/stable/c/c31e72d021db2714df03df6c42855a1db592716c