CVE-2025-40268
cifs: client: fix memory leak in smb3_fs_context_parse_param
CVE-2025-40268 is fixed in 75 products on 1 platform, first by DEBIAN-CVE-2025-40268, released December 6, 2025. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0020
10th percentile
In the Linux kernel, the following vulnerability has been resolved: cifs: client: fix memory leak in smb3_fs_context_parse_param The user calls fsconfig twice, but when the program exits, free() only frees ctx->source for the second fsconfig, not the first. Regarding fc->source, there is no code in the fs context related to its memory reclamation. To fix this memory leak, release the source memory corresponding to ctx or fc before each parsing. syzbot reported: BUG: memory leak unreferenced object 0xffff888128afa360 (size 96): backtrace (crc 79c9c7ba): kstrdup+0x3c/0x80 mm/util.c:84 smb3_fs_context_parse_param+0x229b/0x36c0 fs/smb/client/fs_context.c:1444 BUG: memory leak unreferenced object 0xffff888112c7d900 (size 96): backtrace (crc 79c9c7ba): smb3_fs_context_fullpath+0x70/0x1b0 fs/smb/client/fs_context.c:629 smb3_fs_context_parse_param+0x2266/0x36c0 fs/smb/client/fs_context.c:1438
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool6.12 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| bpftool6.12-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.28.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-azure · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-azure · sles 15.7 | 6.4.0-150700.20.24.1 | SUSE-SU-2026:0281-1 | Jan 23, 2026 |
| kernel-azure · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.28.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-default · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.9.1.160000.2.6 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.28.1.150700.17.19.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.9.1.160000.2.6 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.28.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-docs · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-livepatch-6.12.63-84.121 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_8 · sles 15.7 | 1-150700.1.3.1 | SUSE-SU-2026:0278-1 | Jan 23, 2026 |
| kernel-livepatch-SLE15-SP7_Update_8 · sles 15.7 | 1-150700.15.3.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.28.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.28.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-source · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-source-azure · sles 15.7 | 6.4.0-150700.20.24.1 | SUSE-SU-2026:0281-1 | Jan 23, 2026 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.28.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-syms · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel-syms-azure · sles 15.7 | 6.4.0-150700.20.24.1 | SUSE-SU-2026:0281-1 | Jan 23, 2026 |
| kernel-uek · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-core · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-core · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-core · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-core · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-devel · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-devel · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-core · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-core · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-deprecated · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-deprecated · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-desktop · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-desktop · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-extra · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-extra · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-extra-netfilter · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-extra-netfilter · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-usb · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-usb · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-wireless · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-debug-modules-wireless · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-devel · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-devel · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-doc · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-doc · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-core · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-core · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-deprecated · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-deprecated · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-desktop · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-desktop · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-extra · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-extra · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-extra-netfilter · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-extra-netfilter · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-usb · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-usb · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-wireless · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-modules-wireless · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-tools · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek-tools · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-core · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-core · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-devel · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-devel · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-core · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-core · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-deprecated · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-deprecated · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-desktop · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-desktop · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-extra · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-extra · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-extra-netfilter · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-extra-netfilter · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-usb · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-usb · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-wireless · ol 10 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-uek64k-modules-wireless · ol 9 | 0:6.12.0-107.59.3.2.el9uek | ELSA-2026-50006 | Jan 13, 2026 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.9.1 | OPENSUSE-SU-2026:20145-1 | Feb 2, 2026 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.28.1 | SUSE-SU-2026:0315-1 | Jan 28, 2026 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.9.1 | SUSE-SU-2026:20220-1 | Feb 2, 2026 |
| kernel6.12 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-debuginfo-common-aarch64 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-debuginfo-common-x86_64 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-devel · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-headers · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-libbpf · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-libbpf-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-libbpf-devel · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-libbpf-static · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-modules-extra · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-modules-extra-common · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-tools · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-tools-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| kernel6.12-tools-devel · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.63-1 | DEBIAN-CVE-2025-40268 | Dec 6, 2025 |
| linux · Debian 14 | 6.17.9-1 | DEBIAN-CVE-2025-40268 | Dec 6, 2025 |
| perf6.12 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| perf6.12-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| python3-perf6.12 · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
| python3-perf6.12-debuginfo · amzn 2023 | 1:6.12.63-84.121.amzn2023 | ALAS2023-2026-1430 | Feb 16, 2026 |
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