{"id":"CVE-2025-38696","summary":"MIPS: Don't crash in stack_top() for tasks without ABI or vDSO","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nMIPS: Don't crash in stack_top() for tasks without ABI or vDSO\n\nNot all tasks have an ABI associated or vDSO mapped,\nfor example kthreads never do.\nIf such a task ever ends up calling stack_top(), it will derefence the\nNULL ABI pointer and crash.\n\nThis can for example happen when using kunit:\n\n    mips_stack_top+0x28/0xc0\n    arch_pick_mmap_layout+0x190/0x220\n    kunit_vm_mmap_init+0xf8/0x138\n    __kunit_add_resource+0x40/0xa8\n    kunit_vm_mmap+0x88/0xd8\n    usercopy_test_init+0xb8/0x240\n    kunit_try_run_case+0x5c/0x1a8\n    kunit_generic_run_threadfn_adapter+0x28/0x50\n    kthread+0x118/0x240\n    ret_from_kernel_thread+0x14/0x1c\n\nOnly dereference the ABI point if it is set.\n\nThe GIC page is also included as it is specific to the vDSO.\nAlso move the randomization adjustment into the same conditional.","modified":"2026-04-24T06:42:50.481837059Z","published":"2025-09-04T15:32:48.973Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38696.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/24d098b6f69b0aa806ffcb3e18259bee31650b28"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5b6839b572b503609b9b58bc6c04a816eefa0794"},{"type":"WEB","url":"https://git.kernel.org/stable/c/82d140f6aab5e89a9d3972697a0dbe1498752d9b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ab18e48a503230d675e824a0d68a108bdff42503"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd90dbd196831f5c2620736dc221db2634cf1e8e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cddf47d20b0325dc8a4e57b833fe96e8f36c42a4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e78033e59444d257d095b73ce5d20625294f6ec2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e9f4a6b3421e936c3ee9d74710243897d74dbaa2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f22de2027b206ddfb8a075800bb5d0dacf2da4b8"},{"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/2025/38xxx/CVE-2025-38696.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38696"},{"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":"ea7e0480a4b695d0aa6b3fa99bd658a003122113"},{"fixed":"ab18e48a503230d675e824a0d68a108bdff42503"},{"fixed":"e78033e59444d257d095b73ce5d20625294f6ec2"},{"fixed":"bd90dbd196831f5c2620736dc221db2634cf1e8e"},{"fixed":"5b6839b572b503609b9b58bc6c04a816eefa0794"},{"fixed":"f22de2027b206ddfb8a075800bb5d0dacf2da4b8"},{"fixed":"82d140f6aab5e89a9d3972697a0dbe1498752d9b"},{"fixed":"24d098b6f69b0aa806ffcb3e18259bee31650b28"},{"fixed":"cddf47d20b0325dc8a4e57b833fe96e8f36c42a4"},{"fixed":"e9f4a6b3421e936c3ee9d74710243897d74dbaa2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"86717a97f9218de798c6d33e0014ab9325e18f56"},{"last_affected":"e4882348eaa9f5f052cb21d2a5aa99a063e4308b"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38696.json"}}],"schema_version":"1.7.5"}