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Linux Distros Unpatched Vulnerability : CVE-2026-45998

🗓️ 28 May 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 5 Views

Linux kernel vulnerability CVE-2026-45998 may cause use-after-free in rxrpc if skb_unshare() fails; no vendor patch.

Related
Refs
Code
ReporterTitlePublishedViews
Family
CNNVD
Linux kernel 安全漏洞
27 May 202600:00
cnnvd
CVE
CVE-2026-45998
27 May 202612:55
cve
Cvelist
CVE-2026-45998 rxrpc: Fix potential UAF after skb_unshare() failure
27 May 202612:55
cvelist
Debian CVE
CVE-2026-45998
27 May 202612:55
debiancve
EUVD
EUVD-2026-32294
27 May 202612:55
euvd
NVD
CVE-2026-45998
27 May 202614:17
nvd
OSV
BELL-CVE-2026-45998
28 May 202606:10
osv
OSV
DEBIAN-CVE-2026-45998
27 May 202614:17
osv
OSV
UBUNTU-CVE-2026-45998
27 May 202600:00
osv
OSV
USN-8370-1 linux, linux-aws, linux-gcp, linux-ibm, linux-nvidia, linux-oracle, linux-raspi, linux-realtime vulnerabilities
2 Jun 202613:52
osv
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

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  - In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix potential UAF after
    skb_unshare() failure If skb_unshare() fails to unshare a packet due to allocation failure in
    rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread()) will be NULL'd out. This will
    likely cause the call to trace_rxrpc_rx_done() to oops. Fix this by moving the unsharing down to where
    rxrpc_input_call_event() calls rxrpc_input_call_packet(). There are a number of places prior to that where
    we ignore DATA packets for a variety of reasons (such as the call already being complete) for which an
    unshare is then avoided. And with that, rxrpc_input_packet() doesn't need to take a pointer to the pointer
    to the packet, so change that to just a pointer. (CVE-2026-45998)

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if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
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          {"reference": "kernel-rt-debug-modules-internal"},
          {"reference": "kernel-rt-debug-modules-partner"},
          {"reference": "kernel-rt-devel"},
          {"reference": "kernel-rt-devel-matched"},
          {"reference": "kernel-rt-kvm"},
          {"reference": "kernel-rt-modules"},
          {"reference": "kernel-rt-modules-core"},
          {"reference": "kernel-rt-modules-extra"},
          {"reference": "kernel-rt-modules-internal"},
          {"reference": "kernel-rt-modules-partner"},
          {"reference": "kernel-rt-selftests-internal"},
          {"reference": "kernel-selftests-internal"},
          {"reference": "kernel-tools"},
          {"reference": "kernel-tools-libs"},
          {"reference": "kernel-tools-libs-devel"},
          {"reference": "kernel-uki-virt"},
          {"reference": "kernel-uki-virt-addons"},
          {"reference": "kernel-zfcpdump"},
          {"reference": "kernel-zfcpdump-core"},
          {"reference": "kernel-zfcpdump-devel"},
          {"reference": "kernel-zfcpdump-devel-matched"},
          {"reference": "kernel-zfcpdump-modules"},
          {"reference": "kernel-zfcpdump-modules-core"},
          {"reference": "kernel-zfcpdump-modules-extra"},
          {"reference": "kernel-zfcpdump-modules-internal"},
          {"reference": "kernel-zfcpdump-modules-partner"},
          {"reference": "libperf"},
          {"reference": "libperf-devel"},
          {"reference": "perf"},
          {"reference": "python3-perf"},
          {"reference": "rtla"},
          {"reference": "rv"}
        ]
      }
    ]
  }
};

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');
}

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28 May 2026 00:00Current
5.7Medium risk
Vulners AI Score5.7
EPSS0.00024
5