{"id":"CVE-2025-37778","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix dangling pointer in krb_authenticate\n\nkrb_authenticate frees sess->user and does not set the pointer\nto NULL","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix dangling pointer in krb_authenticate\n\nkrb_authenticate frees sess->user and does not set the pointer\nto NULL. It calls ksmbd_krb5_authenticate to reinitialis…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.15, < 6.1.135","linux_kernel >= 6.2, < 6.6.88","linux_kernel >= 6.7, < 6.12.25","linux_kernel >= 6.13, < 6.14.4","linux_kernel = 6.15","debian_linux = 11.0"],"patched":["linux_kernel 6.14.4"],"published":"2025-05-01","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:18:17.730","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-37778","references":[{"url":"https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"epss":0.01141,"epssPercentile":0.66487,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-15T21:45:08.250417Z"},"ingestedAt":"2026-10-15T22:48:25.478Z","slug":"CVE-2025-37778","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix dangling pointer in krb_authenticate\n\nkrb_authenticate frees sess->user and does not set the pointer\nto NULL. It calls ksmbd_krb5_authenticate to reinitialise\nsess->user but that function may return without doing so. If\nthat happens then smb2_sess_setup, which calls krb_authenticate,\nwill be accessing free'd memory when it later uses sess->user.\n\n## Affected\n\n- `linux_kernel >= 5.15, < 6.1.135`\n- `linux_kernel >= 6.2, < 6.6.88`\n- `linux_kernel >= 6.7, < 6.12.25`\n- `linux_kernel >= 6.13, < 6.14.4`\n- `linux_kernel = 6.15`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.14.4`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}