{"id":"CVE-2026-31583","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: fix use-after-free in em28xx_v4l2_open()\n\nem28xx_v4l2_open() reads dev->v4l2 without holding dev->lock,\ncreating a race with em28xx_v4l2_init()'s error p…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: fix use-after-free in em28xx_v4l2_open()\n\nem28xx_v4l2_open() reads dev->v4l2 without holding dev->lock,\ncreating a race with em28xx_v4l2_init()'s error p…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 6.6.136","linux_kernel >= 6.12, < 6.12.83","linux_kernel >= 6.13, < 6.18.24","linux_kernel >= 6.19, < 6.19.14","linux_kernel >= 7.0, < 7.0.1"],"patched":["linux_kernel 7.0.1"],"published":"2026-04-24","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:19:11.890","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-31583","references":[{"url":"https://git.kernel.org/stable/c/2cbf81f76842e46bdf25823c70e1db4044a65678","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/38a327221f7f765e7d853b7bafe47e342441ec85","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3c0283a59e36e3707c4a81f4952e362d31f876b8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5fb2940327722b4684d2f964b54c1c90aa277324","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6b9e66437cc6123ddedac141e1b8b6fcf57d2972","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/871b8ea8ef39a6c253594649f4339378fad3d0dd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a66485a934c7187ae8e36517d40615fa2e961cff","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b5d141ea15f173f15b9f0a72965902f3428c0d92","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dd2b888e08d3b3d6aacd65d76cd44fac11da750f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00174,"epssPercentile":0.06409,"ingestedAt":"2026-10-15T03:30:12.858Z","slug":"CVE-2026-31583","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: fix use-after-free in em28xx_v4l2_open()\n\nem28xx_v4l2_open() reads dev->v4l2 without holding dev->lock,\ncreating a race with em28xx_v4l2_init()'s error path and\nem28xx_v4l2_fini(), both of which free the em28xx_v4l2 struct\nand set dev->v4l2 to NULL under dev->lock.\n\nThis race leads to two issues:\n - use-after-free in v4l2_fh_init() when accessing vdev->ctrl_handler,\n   since the video_device is embedded in the freed em28xx_v4l2 struct.\n - NULL pointer dereference in em28xx_resolution_set() when accessing\n   v4l2->norm, since dev->v4l2 has been set to NULL.\n\nFix this by moving the mutex_lock() before the dev->v4l2 read and\nadding a NULL check for dev->v4l2 under the lock.\n\n## Affected\n\n- `linux_kernel < 6.6.136`\n- `linux_kernel >= 6.12, < 6.12.83`\n- `linux_kernel >= 6.13, < 6.18.24`\n- `linux_kernel >= 6.19, < 6.19.14`\n- `linux_kernel >= 7.0, < 7.0.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.1`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}