{"id":"CVE-2025-68193","summary":"drm/xe/guc: Add devm release action to safely tear down CT","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Add devm release action to safely tear down CT\n\nWhen a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE\nflag, the driver initiates TLB invalidation requests via the CTB mechanism\nwhile releasing the BO. However a premature release of the CTB BO can lead\nto system crashes, as observed in:\n\nOops: Oops: 0000 [#1] SMP NOPTI\nRIP: 0010:h2g_write+0x2f3/0x7c0 [xe]\nCall Trace:\n guc_ct_send_locked+0x8b/0x670 [xe]\n xe_guc_ct_send_locked+0x19/0x60 [xe]\n send_tlb_invalidation+0xb4/0x460 [xe]\n xe_gt_tlb_invalidation_ggtt+0x15e/0x2e0 [xe]\n ggtt_invalidate_gt_tlb.part.0+0x16/0x90 [xe]\n ggtt_node_remove+0x110/0x140 [xe]\n xe_ggtt_node_remove+0x40/0xa0 [xe]\n xe_ggtt_remove_bo+0x87/0x250 [xe]\n\nIntroduce a devm-managed release action during xe_guc_ct_init() and\nxe_guc_ct_init_post_hwconfig() to ensure proper CTB disablement before\nresource deallocation, preventing the use-after-free scenario.","modified":"2026-04-02T13:03:21.269121Z","published":"2025-12-16T13:43:19.702Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68193.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/52faa05fcd9f78af99abebe30a4b7b444744c991"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee4b32220a6b41e71512e8804585325e685456ba"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68193.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-68193"},{"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":"231c4110873a5db4975512c30aa10edcc5be56e2"},{"fixed":"52faa05fcd9f78af99abebe30a4b7b444744c991"},{"fixed":"ee4b32220a6b41e71512e8804585325e685456ba"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68193.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.10.0"},{"fixed":"6.17.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68193.json"}}],"schema_version":"1.7.5"}