CVE-2026-98725 (GCVE-0-2026-98725)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:47 – Updated: 2026-10-30 12:39
VLAI
Title
nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
Summary
In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge() nvmet_auth_challenge() receives its output buffer as a void pointer. sizeof(*d) therefore evaluates to one with GCC and undercounts the fixed challenge header by 15 bytes. A short AUTH_RECEIVE buffer can pass the check before the challenge is copied past the end of its allocation. Use the typed challenge pointer when calculating the response size. BUG: KASAN: slab-out-of-bounds in nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569) Write of size 32 by task kworker/1:1H/64 Workqueue: nvmet_tcp_wq nvmet_tcp_io_work Call Trace: nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569) nvmet_tcp_try_recv_pdu (drivers/nvme/target/tcp.c:1119 drivers/nvme/target/tcp.c:1243) nvmet_tcp_io_work (drivers/nvme/target/tcp.c:1350 drivers/nvme/target/tcp.c:1382 drivers/nvme/target/tcp.c:1445) process_one_work (kernel/workqueue.c:3322) worker_thread (kernel/workqueue.c:3405 kernel/workqueue.c:3486) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245) The buggy address is located 16 bytes inside of allocated 33-byte region [ffff888000554e80, ffff888000554ea1) Kernel panic - not syncing: KASAN: panic_on_warn set ...
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6794 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < e94ff1771c4cb398749789557f0b6feb871e3486 (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < ef4dfad231a787aded76e5b03788ddb18c8aebab (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < 9d61131acd742cf97ee64e453383e41b46568513 (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < 7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4 (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < 8a9b4c0eef19c207663c1ee888257307c869ca86 (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < fa6778e030bed9841ddcdf96bc7018da9ac03562 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()\n\nnvmet_auth_challenge() receives its output buffer as a void pointer.\nsizeof(*d) therefore evaluates to one with GCC and undercounts the fixed\nchallenge header by 15 bytes.  A short AUTH_RECEIVE buffer can pass the\ncheck before the challenge is copied past the end of its allocation.\n\nUse the typed challenge pointer when calculating the response size.\n\n  BUG: KASAN: slab-out-of-bounds in nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569)\n  Write of size 32 by task kworker/1:1H/64\n  Workqueue: nvmet_tcp_wq nvmet_tcp_io_work\n  Call Trace:\n  nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569)\n  nvmet_tcp_try_recv_pdu (drivers/nvme/target/tcp.c:1119 drivers/nvme/target/tcp.c:1243)\n  nvmet_tcp_io_work (drivers/nvme/target/tcp.c:1350 drivers/nvme/target/tcp.c:1382 drivers/nvme/target/tcp.c:1445)\n  process_one_work (kernel/workqueue.c:3322)\n  worker_thread (kernel/workqueue.c:3405 kernel/workqueue.c:3486)\n  kthread (kernel/kthread.c:436)\n  ret_from_fork (arch/x86/kernel/process.c:158)\n  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n  The buggy address is located 16 bytes inside of\n   allocated 33-byte region [ffff888000554e80, ffff888000554ea1)\n  Kernel panic - not syncing: KASAN: panic_on_warn set ..."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:39:06.682Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "dateReserved": "2026-09-25T10:25:14.366Z",
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      "initial_release_date": "2026-10-20T01:10:02.000Z",
      "product_status:known_not_affected": "1",
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      "status": "final",
      "title": "nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()",
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      "version": "4"
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          }
        ],
        "id": "CVE-2026-98725",
        "lastModified": "2026-10-30T13:21:21.280",
        "metrics": {},
        "published": "2026-10-18T16:17:26.120",
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      "current_release_date": "2026-11-01T22:36:13+00:00",
      "cve": "CVE-2026-98725",
      "id": "CVE-2026-98725",
      "initial_release_date": "2026-10-18T00:00:00+00:00",
      "product_status:fixed": "623",
      "product_status:known_affected": "24",
      "product_status:known_not_affected": "91",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98725.json",
      "version": "3"
    }
  }
}



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