{"id":"CVE-2026-53210","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: shm: fix shm leak in register_shm_helper()\n\nregister_shm_helper() allocates shm before calling\niov_iter_npages()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: shm: fix shm leak in register_shm_helper()\n\nregister_shm_helper() allocates shm before calling\niov_iter_npages(). If iov_iter_npages() returns 0, the function\njump…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.8, < 6.12.94","linux_kernel >= 6.13, < 6.18.36","linux_kernel >= 6.19, < 7.0.13","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.13"],"published":"2026-06-25","updated":"2026-07-02","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53210","references":[{"url":"https://git.kernel.org/stable/c/26682f5efc276e3ad96d102019472bfbf03833b2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4277759906b44d923a38c8f59f5576501b187b0d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c10c9c48b2903f41ed4c532043b0576e86228236","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dbf779db927414f5b37c1f666013e9b48a88cfde","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00122,"epssPercentile":0.01727,"ingestedAt":"2026-07-03T13:02:28.034Z","slug":"CVE-2026-53210","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntee: shm: fix shm leak in register_shm_helper()\n\nregister_shm_helper() allocates shm before calling\niov_iter_npages(). If iov_iter_npages() returns 0, the function\njumps to err_ctx_put and leaks shm.\n\nThis can be triggered by TEE_IOC_SHM_REGISTER with\nstruct tee_ioctl_shm_register_data where length is 0.\n\nJump to err_free_shm instead.\n\n## Affected\n\n- `linux_kernel >= 6.8, < 6.12.94`\n- `linux_kernel >= 6.13, < 6.18.36`\n- `linux_kernel >= 6.19, < 7.0.13`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.13`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}