{"id":"CVE-2026-74608","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74608","summary":"smb: client: Fix use-after-free in cifs_try_adding_channels()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix use-after-free in cifs_try_adding_channels()\n\ncifs_try_adding_channels() takes a temporary reference to an interface\nbefore dropping iface_lock. If cifs_ses_add_channel() fails, it drops\nthat reference and then increments iface->weight_fulfilled.\n\nA concurrent interface list refresh can remove the list reference while\nchannel creation is in progress. In that case, the failure-path\nkref_put() releases the last reference and frees iface. Updating\nweight_fulfilled afterward then accesses freed memory.\n\nIncrement weight_fulfilled before dropping the temporary reference,\nkeeping iface alive for the final access.","published":"2026-08-22T15:31:55.298Z","modified":"2026-08-24T11:47:08.688587710Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.1.183"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1ffacbadc14530e55b8d86f7b917524f6a0fb891"},{"type":"WEB","url":"https://git.kernel.org/stable/c/47dfac48bce7198ad4f1a388fc8c9491f878ac3b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4986410316b1ae0e63c6ce418e4eb196723626e7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64d7584e62ac8cdc750455c5fdc6008fc2de4f06"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c292d4686f717c03e5022fc4ae7c782f39a94915"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74608.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74608"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-24T11:47:08.688587710Z"}}