Linux Distros Unpatched Vulnerability : CVE-2025-40041

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

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  script_id(272024);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/17");

  script_cve_id("CVE-2025-40041");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2025-40041");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Sign-extend struct ops
    return values properly The ns_bpf_qdisc selftest triggers a kernel panic: Oops[#1]: CPU 0 Unable to handle
    kernel paging request at virtual address 0000000000741d58, era == 90000000851b5ac0, ra == 90000000851b5aa4
    CPU: 0 UID: 0 PID: 449 Comm: test_progs Tainted: G OE 6.16.0+ #3 PREEMPT(full) Tainted: [O]=OOT_MODULE,
    [E]=UNSIGNED_MODULE Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 2/2/2022 pc 90000000851b5ac0 ra
    90000000851b5aa4 tp 90000001076b8000 sp 90000001076bb600 a0 0000000000741ce8 a1 0000000000000001 a2
    90000001076bb5c0 a3 0000000000000008 a4 90000001004c4620 a5 9000000100741ce8 a6 0000000000000000 a7
    0100000000000000 t0 0000000000000010 t1 0000000000000000 t2 9000000104d24d30 t3 0000000000000001 t4
    4f2317da8a7e08c4 t5 fffffefffc002f00 t6 90000001004c4620 t7 ffffffffc61c5b3d t8 0000000000000000 u0
    0000000000000001 s9 0000000000000050 s0 90000001075bc800 s1 0000000000000040 s2 900000010597c400 s3
    0000000000000008 s4 90000001075bc880 s5 90000001075bc8f0 s6 0000000000000000 s7 0000000000741ce8 s8
    0000000000000000 ra: 90000000851b5aa4 __qdisc_run+0xac/0x8d8 ERA: 90000000851b5ac0 __qdisc_run+0xc8/0x8d8
    CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) PRMD: 00000004 (PPLV0 +PIE -PWE) EUEN: 00000007
    (+FPE +SXE +ASXE -BTE) ECFG: 00071c1d (LIE=0,2-4,10-12 VS=7) ESTAT: 00010000 [PIL] (IS= ECode=1
    EsubCode=0) BADV: 0000000000741d58 PRID: 0014c010 (Loongson-64bit, Loongson-3A5000) Modules linked in:
    bpf_testmod(OE) [last unloaded: bpf_testmod(OE)] Process test_progs (pid: 449,
    threadinfo=000000009af02b3a, task=00000000e9ba4956) Stack : 0000000000000000 90000001075bc8ac
    90000000869524a8 9000000100741ce8 90000001075bc800 9000000100415300 90000001075bc8ac 0000000000000000
    900000010597c400 900000008694a000 0000000000000000 9000000105b59000 90000001075bc800 9000000100741ce8
    0000000000000050 900000008513000c 9000000086936000 0000000100094d4c fffffff400676208 0000000000000000
    9000000105b59000 900000008694a000 9000000086bf0dc0 9000000105b59000 9000000086bf0d68 9000000085147010
    90000001075be788 0000000000000000 9000000086bf0f98 0000000000000001 0000000000000010 9000000006015840
    0000000000000000 9000000086be6c40 0000000000000000 0000000000000000 0000000000000000 4f2317da8a7e08c4
    0000000000000101 4f2317da8a7e08c4 ... Call Trace: [<90000000851b5ac0>] __qdisc_run+0xc8/0x8d8
    [<9000000085130008>] __dev_queue_xmit+0x578/0x10f0 [<90000000853701c0>] ip6_finish_output2+0x2f0/0x950
    [<9000000085374bc8>] ip6_finish_output+0x2b8/0x448 [<9000000085370b24>] ip6_xmit+0x304/0x858
    [<90000000853c4438>] inet6_csk_xmit+0x100/0x170 [<90000000852b32f0>] __tcp_transmit_skb+0x490/0xdd0
    [<90000000852b47fc>] tcp_connect+0xbcc/0x1168 [<90000000853b9088>] tcp_v6_connect+0x580/0x8a0
    [<90000000852e7738>] __inet_stream_connect+0x170/0x480 [<90000000852e7a98>] inet_stream_connect+0x50/0x88
    [<90000000850f2814>] __sys_connect+0xe4/0x110 [<90000000850f2858>] sys_connect+0x18/0x28
    [<9000000085520c94>] do_syscall+0x94/0x1a0 [<9000000083df1fb8>] handle_syscall+0xb8/0x158 Code: 4001ad80
    2400873f 2400832d <240073cc> 001137ff 001133ff 6407b41f 001503cc 0280041d ---[ end trace 0000000000000000
    ]--- The bpf_fifo_dequeue prog returns a skb which is a pointer. The pointer is treated as a 32bit value
    and sign extend to 64bit in epilogue. This behavior is right for most bpf prog types but wrong for struct
    ops which requires LoongArch ABI. So let's sign extend struct ops return values according to the LoongArch
    ABI ([1]) and return value spec in function model. [1]: https://loongson.github.io/LoongArch-
    Documentation/LoongArch-ELF-ABI-EN.html (CVE-2025-40041)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2025-40041");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-40041");

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  script_set_attribute(attribute:"vuln_publication_date", value:"2025/10/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/30");

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if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

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          {"reference": "linux-riscv-5.19"},
          {"reference": "linux-riscv-6.5"},
          {"reference": "linux-riscv-headers-5.15.0"},
          {"reference": "linux-riscv-tools-5.15.0"},
          {"reference": "linux-starfive-5.19"},
          {"reference": "linux-starfive-6.2"},
          {"reference": "linux-starfive-6.5"},
          {"reference": "linux-tools-5.15.0"},
          {"reference": "linux-tools-5.17.0"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "linux-azure-6.11"},
          {"reference": "linux-buildinfo-6.8.0"},
          {"reference": "linux-cloud-tools-6.8.0"},
          {"reference": "linux-gcp-6.11"},
          {"reference": "linux-headers-6.8.0"},
          {"reference": "linux-hwe-6.11"},
          {"reference": "linux-image-6.8.0"},
          {"reference": "linux-image-unsigned-6.8.0"},
          {"reference": "linux-lowlatency-hwe-6.11"},
          {"reference": "linux-modules-6.8.0"},
          {"reference": "linux-modules-extra-6.8.0"},
          {"reference": "linux-modules-ipu6-6.8.0"},
          {"reference": "linux-modules-iwlwifi-6.8.0"},
          {"reference": "linux-oem-6.11"},
          {"reference": "linux-oem-6.8-headers-6.8.0"},
          {"reference": "linux-oem-6.8-lib-rust-6.8.0"},
          {"reference": "linux-oem-6.8-tools-6.8.0"},
          {"reference": "linux-raspi-realtime"},
          {"reference": "linux-realtime"},
          {"reference": "linux-riscv-headers-6.8.0"},
          {"reference": "linux-riscv-tools-6.8.0"},
          {"reference": "linux-tools-6.8.0"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}