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Fencer Vulns
high 7.8

CVE-2023-52974 json

scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress

published 2025-03-27 19 mo ago modified 2026-08-05 3 mo ago also EUVD-2023-59746

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress

If during iscsi_sw_tcp_session_create() iscsi_tcp_r2tpool_alloc() fails, userspace could be accessing the host's ipaddress attr. If we then free the session via iscsi_session_teardown() while userspace is still accessing the session we will hit a use after free bug.

Set the tcp_sw_host->session after we have completed session creation and can no longer fail.

Patch / fix

  • Linux Linux 4.14.306, 4.19.273, 5.4.232, 5.10.168, 5.15.93, 6.1.11, 6.2
  • linux Debian 14, Debian 13, Debian 12 6.1.11-1

debian advisories DEBIAN-CVE-2023-52974

  • linux Ubuntu 18.04 LTS 4.15.0-211.222
  • linux Ubuntu 20.04 LTS 5.4.0-149.166
  • linux Ubuntu 22.04 LTS 5.15.0-72.79
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1156.169
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1102.110
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1036.40
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1105.114
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1034.42

ubuntu advisories UBUNTU-CVE-2023-52974

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt RHEL 9.0 EUS 5.14.0-70.85.1.rt21.156.el9_0
  • kernel-rt-kvm RHEL 9.0 EUS 5.14.0-70.85.1.rt21.156.el9_0
  • kernel-rt-core RHEL 9.0 EUS 5.14.0-70.85.1.rt21.156.el9_0
  • kernel-rt-modules RHEL 9.0 EUS 5.14.0-70.85.1.rt21.156.el9_0
  • kernel-rt-debug-kvm RHEL 9.0 EUS 5.14.0-70.85.1.rt21.156.el9_0
  • kernel-rt-debug-core RHEL 9.0 EUS 5.14.0-70.85.1.rt21.156.el9_0
  • kernel-rt-debug-modules RHEL 9.0 EUS 5.14.0-70.85.1.rt21.156.el9_0
  • kernel-rt-modules-extra RHEL 9.0 EUS 5.14.0-70.85.1.rt21.156.el9_0

red hat advisories RHSA-2024:0431RHSA-2024:0432RHSA-2024:0575

  • kernel-64kb SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS, Enterprise Storage 7.1 5.3.18-150300.59.201.1
  • kernel-syms SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 5.3.18-150300.59.201.1
  • kernel-source SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 5.3.18-150300.59.201.1
  • kernel-default SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +5 more 5.3.18-150300.59.201.1
  • kernel-preempt SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 5.3.18-150300.59.201.1
  • kernel-obs-build SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 5.3.18-150300.59.201.1
  • kernel-default-base SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +3 more 5.3.18-150300.59.201.1.150300.18.120.1
  • kernel-64kb SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS, SLE High Performance Computing 15 SP5-ESPOS 5.14.21-150500.55.100.1

suse advisories SUSE-SU-2025:02099-1SUSE-SU-2025:1293-1SUSE-SU-2025:1263-1SUSE-SU-2025:1241-1SUSE-SU-2025:1195-1SUSE-SU-2025:1194-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-52974 updated cvss 7.0

kernel: scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.43.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.43.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.43.1.el8_8
    fixed: vendor fix RHSA-2024:0575
  • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-debuginfo-common-s390x 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.85.1.el9_0 Red Hat Enterprise Linux AppStream EUS (v.9.0) perf 5.14.0-70.85.1.el9_0, kernel-devel-matched 5.14.0-70.85.1.el9_0, kernel-debug-devel-matched 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.85.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.85.1.el9_0, +2 more
    fixed: vendor fix RHSA-2024:0432
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.43.1.el8_8, kernel 4.18.0-477.43.1.el8_8, bpftool 4.18.0-477.43.1.el8_8, kernel-core 4.18.0-477.43.1.el8_8, kernel-tools 4.18.0-477.43.1.el8_8, python3-perf 4.18.0-477.43.1.el8_8, +15 more
    fixed: vendor fix RHSA-2024:0575
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kernel 5.14.0-70.85.1.el9_0, bpftool 5.14.0-70.85.1.el9_0, kernel-core 5.14.0-70.85.1.el9_0, kernel-tools 5.14.0-70.85.1.el9_0, python3-perf 5.14.0-70.85.1.el9_0, kernel-modules 5.14.0-70.85.1.el9_0, +14 more
    fixed: vendor fix RHSA-2024:0432
show 2 more
  • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules-extra 5.14.0-70.85.1.rt21.156.el9_0, +2 more Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-kvm 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-kvm 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-core 5.14.0-70.85.1.rt21.156.el9_0, +4 more
    fixed: vendor fix RHSA-2024:0431
  • Red Hat Enterprise Linux 10 kernel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
19 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.