CVE-2025-39873
can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB
CVE-2025-39873 is fixed in 24 products on 1 platform, first by DEBIAN-CVE-2025-39873, released September 23, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0016
5th percentile
In the Linux kernel, the following vulnerability has been resolved: can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB can_put_echo_skb() takes ownership of the SKB and it may be freed during or after the call. However, xilinx_can xcan_write_frame() keeps using SKB after the call. Fix that by only calling can_put_echo_skb() after the code is done touching the SKB. The tx_lock is held for the entire xcan_write_frame() execution and also on the can_get_echo_skb() side so the order of operations does not matter. An earlier fix commit 3d3c817c3a40 ("can: xilinx_can: Fix usage of skb memory") did not move the can_put_echo_skb() call far enough. [mkl: add "commit" in front of sha1 in patch description] [mkl: fix indention]
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dtb-aarch64 · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-64kb · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-64kb · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-azure · opensuse-leap 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-azure · sles 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-azure · sles 15.7 | 6.4.0-150700.20.18.1 | SUSE-SU-2025:4132-1 | Nov 18, 2025 |
| kernel-debug · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-default · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-default · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-default-base · opensuse-leap 15.6 | 6.4.0-150600.23.73.1.150600.12.32.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.6.1.160000.2.4 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-default-base · sles 15.6 | 6.4.0-150600.23.73.1.150600.12.32.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.22.1.150700.17.15.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.6.1.160000.2.4 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-docs · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-docs · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-docs · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-kvmsmall · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-livepatch-SLE15-SP6-RT_Update_16 · sles 15.6 | 1-150600.1.3.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-livepatch-SLE15-SP6_Update_16 · sles 15.6 | 1-150600.13.3.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-livepatch-SLE15-SP7-RT_Update_6 · sles 15.7 | 1-150700.1.3.1 | SUSE-SU-2025:4141-1 | Nov 19, 2025 |
| kernel-livepatch-SLE15-SP7_Update_6 · sles 15.7 | 1-150700.15.3.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-obs-build · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-obs-build · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-obs-qa · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-rt · opensuse-leap 15.6 | 6.4.0-150600.10.55.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-rt_debug · opensuse-leap 15.6 | 6.4.0-150600.10.55.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-source · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-source · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-source · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-source-azure · opensuse-leap 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-source-azure · sles 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-source-azure · sles 15.7 | 6.4.0-150700.20.18.1 | SUSE-SU-2025:4132-1 | Nov 18, 2025 |
| kernel-source-rt · opensuse-leap 15.6 | 6.4.0-150600.10.55.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-syms · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-syms · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-syms · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| kernel-syms-azure · opensuse-leap 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-syms-azure · sles 15.6 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 | Oct 17, 2025 |
| kernel-syms-azure · sles 15.7 | 6.4.0-150700.20.18.1 | SUSE-SU-2025:4132-1 | Nov 18, 2025 |
| kernel-syms-rt · opensuse-leap 15.6 | 6.4.0-150600.10.55.1 | SUSE-SU-2025:3751-1 | Oct 23, 2025 |
| kernel-zfcpdump · opensuse-leap 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.6.1 | OPENSUSE-SU-2025:20081-1 | Nov 25, 2025 |
| kernel-zfcpdump · sles 15.6 | 6.4.0-150600.23.73.1 | SUSE-SU-2025:03600-1 | Oct 15, 2025 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.22.1 | SUSE-SU-2025:4057-1 | Nov 11, 2025 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.6.1 | SUSE-SU-2025:21139-1 | Nov 25, 2025 |
| linux · Debian 12.15 (bookworm) | 6.1.153-1 | DEBIAN-CVE-2025-39873 | Sep 23, 2025 |
| linux · Debian 13.5 (trixie) | 6.12.48-1 | DEBIAN-CVE-2025-39873 | Sep 23, 2025 |
| linux · Debian 14 | 6.16.8-1 | DEBIAN-CVE-2025-39873 | Sep 23, 2025 |
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