CVE-2025-40139
smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().
CVE-2025-40139 is fixed in 25 products on 1 platform, first by DEBIAN-CVE-2025-40139, released November 12, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
8.4
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0017
5th percentile
In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set(). smc_clc_prfx_set() is called during connect() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dev_dst_rcu() under rcu_read_lock() after kernel_getsockname(). Note that the returned value of smc_clc_prfx_set() is not used in the caller. While at it, we change the 1st arg of smc_clc_prfx_set[46]_rcu() not to touch dst there.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dtb-aarch64 · opensuse-leap 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-64kb · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-64kb · sles 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-azure · opensuse-leap 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-azure · sles 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-azure · sles 15.7 | 6.4.0-150700.20.21.1 | SUSE-SU-2025:4517-1 | Dec 23, 2025 |
| kernel-debug · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-default · sles 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-default · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-default-base · opensuse-leap 15.6 | 6.4.0-150600.23.81.3.150600.12.36.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.8.1.160000.2.5 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-default-base · sles 15.6 | 6.4.0-150600.23.81.3.150600.12.36.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.25.1.150700.17.17.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.8.1.160000.2.5 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-docs · opensuse-leap 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-docs · sles 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.25.2 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-docs · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-kvmsmall · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-livepatch-SLE15-SP6-RT_Update_18 · sles 15.6 | 1-150600.1.3.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-livepatch-SLE15-SP6_Update_18 · sles 15.6 | 1-150600.13.3.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-livepatch-SLE15-SP7-RT_Update_7 · sles 15.7 | 1-150700.1.3.1 | SUSE-SU-2025:4516-1 | Dec 23, 2025 |
| kernel-livepatch-SLE15-SP7_Update_7 · sles 15.7 | 1-150700.15.3.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-obs-build · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-obs-build · sles 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-obs-qa · opensuse-leap 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-rt · opensuse-leap 15.6 | 6.4.0-150600.10.61.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-rt_debug · opensuse-leap 15.6 | 6.4.0-150600.10.61.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-source · opensuse-leap 15.6 | 6.4.0-150600.23.81.2 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-source · sles 15.6 | 6.4.0-150600.23.81.2 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-source · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-source-azure · opensuse-leap 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-source-azure · sles 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-source-azure · sles 15.7 | 6.4.0-150700.20.21.1 | SUSE-SU-2025:4517-1 | Dec 23, 2025 |
| kernel-source-rt · opensuse-leap 15.6 | 6.4.0-150600.10.61.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-syms · opensuse-leap 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-syms · sles 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-syms · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-syms-azure · opensuse-leap 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-syms-azure · sles 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-syms-azure · sles 15.7 | 6.4.0-150700.20.21.1 | SUSE-SU-2025:4517-1 | Dec 23, 2025 |
| kernel-syms-rt · opensuse-leap 15.6 | 6.4.0-150600.10.61.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-zfcpdump · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-zfcpdump · sles 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| linux · Debian 12.15 (bookworm) | 6.1.187-1 | DEBIAN-CVE-2025-40139 | Nov 12, 2025 |
| linux · Debian 13.5 (trixie) | 6.12.111-1 | DEBIAN-CVE-2025-40139 | Nov 12, 2025 |
| linux · Debian 14 | 6.17.6-1 | DEBIAN-CVE-2025-40139 | Nov 12, 2025 |
| linux-6.12 · Debian 12.15 (bookworm) | 6.12.111-1~deb12u1 | DEBIAN-CVE-2025-40139 | Nov 12, 2025 |
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