{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  vt: selection: Fix unsigned underflow and slab-out-of-bounds read in paste_selection()  In paste_selection(), the loop copies min_t(unsigned int, vc_sel.buf_len - pasted,tty-\u003ereceive_room) bytes per iteration into tty_ldisc_receive_buf() and increments pasted += count.  Because the selection mutex (vc_sel.lock) is dropped inside the loop Whenever the line discipline buffer fills up and paste_selection() sleeps on tty-\u003ewrite_wait, a concurrent TIOCLINUX (TIOCL_SETSEL) ioctl can replace vc_sel.buffer with a shorter selection and reduce vc_sel.buf_len below pasted.  When paste_selection() resumes, vc_sel.buf_len - pasted underflows as an unsigned integer to a large positive value, causing tty_ldisc_receive_buf(ld, vc_sel.buffer + pasted, NULL, count) to read up to 4094 bytes out-of-bounds past the newly allocated vc_sel.buffer.  Fix this by terminating the loop when pasted \u003e= vc_sel.buf_len.  Kernel stack trace (Linux 7.3.0-rc3):  ==================================================================  BUG: KASAN: slab-out-of-bounds in n_tty_receive_buf_common+0xa01/0x1650  Read of size 4094 at addr ffff888101c58010 by task kworker/u17:1/65  Workqueue: events_unbound flush_to_ldisc  Call Trace:   \u003cTASK\u003e   dump_stack_lvl+0x70/0xa0   print_report+0x153/0x4c6   kasan_report+0xf1/0x120   kasan_check_range+0x11c/0x200   __asan_memcpy+0x29/0x70   n_tty_receive_buf_common+0xa01/0x1650   tty_ldisc_receive_buf+0x66/0x110   tty_port_default_receive_buf+0x6b/0xb0   flush_to_ldisc+0x1b4/0x410   process_one_work+0x6ff/0x1110   worker_thread+0x4a8/0xb70   kthread+0x307/0x3e0   ret_from_fork+0x3ed/0x680   \u003c/TASK\u003e  ==================================================================",
  "id": "DEBIAN-CVE-2026-98839",
  "modified": "2026-10-19T04:47:27.713242365Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98839"
    }
  ],
  "upstream": [
    "CVE-2026-98839"
  ]
}