{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.180-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.100-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "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:  crypto: ccp - Treat zero-length cert chain as query for blob lengths  When handling a PDH export, treat a zero-length userspace cert chain buffer as a request to query the length of the relevant blobs.  Failure to account for the zero-length buffer trips a BUG_ON() when running with CONFIG_DEBUG_VIRTUAL=y due to trying to get the physical address of the ZERO_SIZE_PTR (returned by kzalloc() on the bogus allocation).     kernel BUG at arch/x86/mm/physaddr.c:28 !   Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI   CPU: 30 UID: 0 PID: 28580 Comm: syz.2.18 Kdump: loaded   Tainted: G        W           6.18.16-smp-DEV #1 NONE   Tainted: [W]=WARN   Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 12.62.0-0 11/19/2025    RIP: 0010:__phys_addr+0x16a/0x180 arch/x86/mm/physaddr.c:28   RSP: 0018:ffffc9008329fc80 EFLAGS: 00010293   RAX: ffffffff8179110a RBX: 0000778000000010 RCX: ffff8884e6992600   RDX: 0000000000000000 RSI: 0000000080000010 RDI: 0000778000000010   RBP: ffffc9008329fdf0 R08: 0000000000000dc0 R09: 00000000ffffffff   R10: dffffc0000000000 R11: fffffbfff126d297 R12: dffffc0000000000   R13: 1ffff92010653fc8 R14: 0000000080000010 R15: dffffc0000000000   FS:  0000555556bec9c0(0000) GS:ffff88aa4ce1c000(0000) knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   CR2: 00007fd3159e7000 CR3: 00000004fbc44000 CR4: 0000000000350ef0   Call Trace:    \u003cTASK\u003e     [\u003cffffffff853d3869\u003e] sev_ioctl_do_pdh_export+0x559/0x7a0 drivers/crypto/ccp/sev-dev.c:2308     [\u003cffffffff853d1fdd\u003e] sev_ioctl+0x2cd/0x480 drivers/crypto/ccp/sev-dev.c:2556     [\u003cffffffff82549ebc\u003e] vfs_ioctl fs/ioctl.c:52 [inline]     [\u003cffffffff82549ebc\u003e] __do_sys_ioctl fs/ioctl.c:598 [inline]     [\u003cffffffff82549ebc\u003e] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584     [\u003cffffffff8630115f\u003e] do_syscall_x64 arch/x86/entry/syscall_64.c:64 [inline]     [\u003cffffffff8630115f\u003e] do_syscall_64+0x9f/0xf40 arch/x86/entry/syscall_64.c:98    [\u003cffffffff81000136\u003e] entry_SYSCALL_64_after_hwframe+0x76/0x7e   RIP: 0033:0x7fd3158eac39    \u003c/TASK\u003e  Thankfully, the bug is benign outside of CONFIG_DEBUG_VIRTUAL=y as getting the physical address is just arithmetic, and the PSP errors out before trying to write to the garbage address (which it must, otherwise querying the blob lengths would clobber memory at pfn=0).",
  "id": "DEBIAN-CVE-2026-80652",
  "modified": "2026-09-14T16:47:31.305482570Z",
  "published": "2026-08-28T08:16:50.200Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-80652"
    }
  ],
  "upstream": [
    "CVE-2026-80652"
  ]
}