{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.5-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  alloc_tag: fix use-after-free in /proc/allocinfo after module unload  allocinfo_start() only reinitializes the codetag iterator at position 0.  For subsequent reads (position \u003e 0), it reuses cached iterator state from the previous batch.  allocinfo_stop() drops mod_lock between read batches, which allows module unload to complete and free the module memory that the cached iterator still references:    CPU0 (read)                        CPU1 (rmmod)   ----                               ----   allocinfo_start(pos=0)     down_read(mod_lock)     allocinfo_show()     ...   allocinfo_stop()     up_read(mod_lock)                                      codetag_unload_module()                                        kfree(cmod)                                        release_module_tags()                                      ...                                      free_mod_mem()   allocinfo_start(pos=N)     down_read(mod_lock)     // reuses cached iter, skips re-init   allocinfo_show()     ct-\u003efilename   \u003c-- UAF  After free_mod_mem() frees the module's .rodata, allocinfo_show() dereferences ct-\u003efilename, ct-\u003efunction which point there.  Save the iterator state in allocinfo_next() and resume from it in allocinfo_start() with codetag_next_ct(), which detects module removal via idr_find() returning NULL and skips to the next module.",
  "id": "DEBIAN-CVE-2026-72431",
  "modified": "2026-09-14T16:47:31.931833369Z",
  "published": "2026-08-15T06:22:16.960Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-72431"
    }
  ],
  "upstream": [
    "CVE-2026-72431"
  ]
}