{"id":"CVE-2025-39873","summary":"can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB\n\ncan_put_echo_skb() takes ownership of the SKB and it may be freed\nduring or after the call.\n\nHowever, xilinx_can xcan_write_frame() keeps using SKB after the call.\n\nFix that by only calling can_put_echo_skb() after the code is done\ntouching the SKB.\n\nThe tx_lock is held for the entire xcan_write_frame() execution and\nalso on the can_get_echo_skb() side so the order of operations does not\nmatter.\n\nAn earlier fix commit 3d3c817c3a40 (\"can: xilinx_can: Fix usage of skb\nmemory\") did not move the can_put_echo_skb() call far enough.\n\n[mkl: add \"commit\" in front of sha1 in patch description]\n[mkl: fix indention]","modified":"2026-04-16T00:00:58.591516985Z","published":"2025-09-23T06:00:46.157Z","related":["SUSE-SU-2025:03600-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20851-1","SUSE-SU-2025:20861-1","SUSE-SU-2025:20870-1","SUSE-SU-2025:20898-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","SUSE-SU-2025:3751-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4141-1","openSUSE-SU-2025:20081-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39873.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1139321161a3ba5e45e61e0738b37f42f20bc57a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/668cc1e3bb21101d074e430de1b7ba8fd10189e7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/725b33deebd6e4c96fe7893f384510a54258f28f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/94b050726288a56a6b8ff55aa641f2fedbd3b44c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e202ffd9e54538ef67ec301ebd6d9da4823466c9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ef79f00be72bd81d2e1e6f060d83cf7e425deee4"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39873.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39873"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1598efe57b3e768056e4ca56cb9cf33111e68d1c"},{"fixed":"e202ffd9e54538ef67ec301ebd6d9da4823466c9"},{"fixed":"1139321161a3ba5e45e61e0738b37f42f20bc57a"},{"fixed":"94b050726288a56a6b8ff55aa641f2fedbd3b44c"},{"fixed":"725b33deebd6e4c96fe7893f384510a54258f28f"},{"fixed":"668cc1e3bb21101d074e430de1b7ba8fd10189e7"},{"fixed":"ef79f00be72bd81d2e1e6f060d83cf7e425deee4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39873.json"}}],"schema_version":"1.7.5"}