{"id":"CVE-2026-74728","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-74728","generatedAt":"2026-10-28T09:26:29.304Z","title":"In the Linux kernel, the following vulnerability has been resolved: xfs: handle NULL b_addr in xfs_buf_free When xfs_buf_alloc_backing_mem() fails, xfs_buf_free() is called with bp->b_addr still NULL.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: handle NULL b_addr in xfs_buf_free\n\nWhen xfs_buf_alloc_backing_mem() fails, xfs_buf_free() is called with\nbp->b_addr still NULL.  The code falls through to the folio_put path\nwhich calls virt_to_folio(NULL), dereferencing an invalid address and\ncausing a kernel crash.\n\n Call Trace:\n  xfs_buf_free+0x25f/0x510\n  xfs_buf_alloc+0xc98/0x19b0\n  xfs_buf_find_insert+0x55/0x14d0\n  xfs_buf_get_map+0x122b/0x17c0\n  xfbtree_init_leaf_block+0x11c/0x4a0\n  xfbtree_init+0x1bb/0x460\n  xrep_rmap_setup_scan+0x100/0x1f0\n  xrep_rmapbt+0x41/0xc0\n\nFix this by skipping folio_put() when bp->b_addr is NULL.","published":"2026-08-22T16:16:48.000Z","lastModified":"2026-10-21T13:19:50.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":null,"cwe":[],"affected":[],"epss":{"score":0.00209,"percentile":0.10953,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/3aa0c1d23ee1b9d9b340fb2f4736536e1408d706","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/444ff50ece93060131ad84fbd3f378723d8ac243","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ccf6738adcafa5ddbddc4e71b45d8a51b86643c7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d852729c5f4f830fbe7413df032e29459b3daf83","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74728","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}