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Fencer Vulns
high 7.8

CVE-2023-53373 json

crypto: seqiv - Handle EBUSY correctly

published 2025-09-18 13 mo ago modified 2026-08-05 3 mo ago also EUVD-2025-29968

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

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

crypto: seqiv - Handle EBUSY correctly

As it is seqiv only handles the special return value of EINPROGERSS, which means that in all other cases it will free data related to the request.

However, as the caller of seqiv may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

Patch / fix

  • Linux Linux 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3, 6.3
  • linux Debian 14, Debian 13, Debian 12 6.1.20-1

debian advisories DEBIAN-CVE-2023-53373

  • linux Ubuntu 20.04 LTS 5.4.0-152.169
  • linux Ubuntu 22.04 LTS 5.15.0-75.82
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1104.112
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1038.43
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1107.116
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1036.44
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1036.41
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1051.56

ubuntu advisories UBUNTU-CVE-2023-53373

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 RHEL 9 5.14.0-611.7.1.el9_7
  • rv RHEL 9 5.14.0-611.7.1.el9_7
  • perf RHEL 9 5.14.0-611.7.1.el9_7
  • rtla RHEL 9 5.14.0-611.7.1.el9_7
  • libperf RHEL 9 5.14.0-611.7.1.el9_7
  • kernel-rt RHEL 9 5.14.0-611.7.1.el9_7
  • kernel-64k RHEL 9 5.14.0-611.7.1.el9_7
  • kernel-core RHEL 9 5.14.0-611.7.1.el9_7

red hat advisories RHSA-2025:23445RHSA-2025:22752RHSA-2025:21128RHSA-2025:21112RHSA-2025:21084RHSA-2025:21083

  • kernel-rt SLE Micro 5.5 5.14.21-150500.13.109.1
  • kernel-source-rt SLE Micro 5.5 5.14.21-150500.13.109.1
  • kernel-rt SLE Micro 5.4, SLE Micro 5.3 5.14.21-150400.15.133.1
  • kernel-source-rt SLE Micro 5.4, SLE Micro 5.3 5.14.21-150400.15.133.1
  • kernel-64kb SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS, SLE High Performance Computing 15 SP4-ESPOS 5.14.21-150400.24.179.1
  • kernel-syms SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +3 more 5.14.21-150400.24.179.1
  • kernel-source SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +3 more 5.14.21-150400.24.179.1
  • kernel-default SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +7 more 5.14.21-150400.24.179.1

suse advisories SUSE-SU-2025:4189-1SUSE-SU-2025:3761-1SUSE-SU-2025:3716-1SUSE-SU-2025:03628-1SUSE-SU-2025:03615-1

  • kernel AlmaLinux 8 4.18.0-553.80.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.80.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.80.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.80.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.80.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.80.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.80.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.80.1.el8_10

almalinux advisories ALSA-2025:18297ALSA-2025:18298ALSA-2025:17760

  • kernel-rt Rocky Linux 8 4.18.0-553.80.1.rt7.421.el8_10
  • kernel Rocky Linux 8 4.18.0-553.80.1.el8_10
  • kernel Rocky Linux 9 5.14.0-570.52.1.el9_6

rocky linux advisories RLSA-2025:18298RLSA-2025:18297RLSA-2025:17760

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-2023-53373 updated cvss 7.1

kernel: crypto: seqiv - Handle EBUSY correctly

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.96.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.96.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.96.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.96.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.96.1.el9_4
    fixed: vendor fix RHSA-2025:19104
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.7.1.el9_7, rv 5.14.0-570.52.1.el9_6, perf 5.14.0-611.7.1.el9_7, rtla 5.14.0-611.7.1.el9_7, perf 5.14.0-570.52.1.el9_6, rtla 5.14.0-570.52.1.el9_6, +20 more
    fixed: vendor fix RHSA-2025:17760
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.151.1.el9_0, kernel-devel-matched 5.14.0-70.151.1.el9_0, kernel-debug-devel-matched 5.14.0-70.151.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.151.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.151.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.151.1.el9_0, +2 more
    fixed: vendor fix RHSA-2025:19492
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.146.1.el9_2, rtla 5.14.0-284.146.1.el9_2, kernel-devel-matched 5.14.0-284.146.1.el9_2, kernel-64k-devel-matched 5.14.0-284.146.1.el9_2, kernel-debug-devel-matched 5.14.0-284.146.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.146.1.el9_2, +5 more
    fixed: vendor fix RHSA-2025:21051
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.96.1.el9_4, perf 5.14.0-427.96.1.el9_4, rtla 5.14.0-427.96.1.el9_4, kernel-devel-matched 5.14.0-427.96.1.el9_4, kernel-64k-devel-matched 5.14.0-427.96.1.el9_4, kernel-debug-devel-matched 5.14.0-427.96.1.el9_4, +6 more
    fixed: vendor fix RHSA-2025:19104
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.80.1.el8_10, kernel 4.18.0-553.80.1.el8_10, bpftool 4.18.0-553.80.1.el8_10, kernel-core 4.18.0-553.80.1.el8_10, kernel-tools 4.18.0-553.80.1.el8_10, python3-perf 4.18.0-553.80.1.el8_10, +15 more
    fixed: vendor fix RHSA-2025:18297
show 26 more
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.7.1.el9_7, kernel 5.14.0-570.52.1.el9_6, kernel-64k 5.14.0-611.7.1.el9_7, kernel-64k 5.14.0-570.52.1.el9_6, kernel-core 5.14.0-611.7.1.el9_7, kernel-core 5.14.0-570.52.1.el9_6, +60 more
    fixed: vendor fix RHSA-2025:17760
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.178.1.el8_2, kernel 4.18.0-193.178.1.el8_2, bpftool 4.18.0-193.178.1.el8_2, kernel-core 4.18.0-193.178.1.el8_2, kernel-tools 4.18.0-193.178.1.el8_2, python3-perf 4.18.0-193.178.1.el8_2, +8 more
    fixed: vendor fix RHSA-2025:23445
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.179.1.el8_4, kernel 4.18.0-305.179.1.el8_4, bpftool 4.18.0-305.179.1.el8_4, kernel-core 4.18.0-305.179.1.el8_4, kernel-tools 4.18.0-305.179.1.el8_4, python3-perf 4.18.0-305.179.1.el8_4, +8 more
    fixed: vendor fix RHSA-2025:22752
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.168.1.el8_6, kernel 4.18.0-372.168.1.el8_6, bpftool 4.18.0-372.168.1.el8_6, kernel-core 4.18.0-372.168.1.el8_6, kernel-tools 4.18.0-372.168.1.el8_6, python3-perf 4.18.0-372.168.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.168.1.el8_6, kernel 4.18.0-372.168.1.el8_6, bpftool 4.18.0-372.168.1.el8_6, kernel-core 4.18.0-372.168.1.el8_6, kernel-tools 4.18.0-372.168.1.el8_6, python3-perf 4.18.0-372.168.1.el8_6, +15 more
    fixed: vendor fix RHSA-2025:21084
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.118.1.el8_8, kernel 4.18.0-477.118.1.el8_8, bpftool 4.18.0-477.118.1.el8_8, kernel-core 4.18.0-477.118.1.el8_8, kernel-tools 4.18.0-477.118.1.el8_8, python3-perf 4.18.0-477.118.1.el8_8, +9 more
    fixed: vendor fix RHSA-2025:21083
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.151.1.el9_0, bpftool 5.14.0-70.151.1.el9_0, kernel-core 5.14.0-70.151.1.el9_0, kernel-tools 5.14.0-70.151.1.el9_0, python3-perf 5.14.0-70.151.1.el9_0, kernel-modules 5.14.0-70.151.1.el9_0, +14 more
    fixed: vendor fix RHSA-2025:19492
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.146.1.el9_2, kernel 5.14.0-284.146.1.el9_2, kernel-64k 5.14.0-284.146.1.el9_2, kernel-core 5.14.0-284.146.1.el9_2, kernel-tools 5.14.0-284.146.1.el9_2, python3-perf 5.14.0-284.146.1.el9_2, +28 more
    fixed: vendor fix RHSA-2025:21051
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.96.1.el9_4, kernel 5.14.0-427.96.1.el9_4, kernel-64k 5.14.0-427.96.1.el9_4, kernel-core 5.14.0-427.96.1.el9_4, kernel-tools 5.14.0-427.96.1.el9_4, python3-perf 5.14.0-427.96.1.el9_4, +28 more
    fixed: vendor fix RHSA-2025:19104
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.179.1.el8_4, kernel 4.18.0-305.179.1.el8_4, bpftool 4.18.0-305.179.1.el8_4, kernel-core 4.18.0-305.179.1.el8_4, kernel-tools 4.18.0-305.179.1.el8_4, python3-perf 4.18.0-305.179.1.el8_4, +8 more
    fixed: vendor fix RHSA-2025:22752
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.168.1.el8_6, kernel 4.18.0-372.168.1.el8_6, bpftool 4.18.0-372.168.1.el8_6, kernel-core 4.18.0-372.168.1.el8_6, kernel-tools 4.18.0-372.168.1.el8_6, python3-perf 4.18.0-372.168.1.el8_6, +8 more
    fixed: vendor fix RHSA-2025:21084
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.118.1.el8_8, kernel 4.18.0-477.118.1.el8_8, bpftool 4.18.0-477.118.1.el8_8, kernel-core 4.18.0-477.118.1.el8_8, kernel-tools 4.18.0-477.118.1.el8_8, python3-perf 4.18.0-477.118.1.el8_8, +8 more
    fixed: vendor fix RHSA-2025:21083
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.7.1.el9_7, libperf 5.14.0-570.52.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-611.7.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-570.52.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-611.7.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.7.1.el9_7, +4 more
    fixed: vendor fix RHSA-2025:17760
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.80.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.80.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.80.1.el8_10
    fixed: vendor fix RHSA-2025:18297
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.142.1.rt56.1294.el7, kernel-rt-trace 3.10.0-1160.142.1.rt56.1294.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.142.1.rt56.1294.el7
    fixed: vendor fix RHSA-2025:21082
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-kvm 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-core 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-modules 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-debug-kvm 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-debug-core 4.18.0-553.80.1.rt7.421.el8_10, +4 more
    fixed: vendor fix RHSA-2025:18298
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-kvm 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-core 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-modules 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-debug-kvm 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-debug-core 5.14.0-70.151.1.rt21.223.el9_0, +4 more
    fixed: vendor fix RHSA-2025:19268
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.7.1.el9_7, kernel-rt 5.14.0-570.52.1.el9_6, kernel-rt-64k 5.14.0-611.7.1.el9_7, kernel-rt-64k 5.14.0-570.52.1.el9_6, kernel-rt-core 5.14.0-611.7.1.el9_7, kernel-rt-core 5.14.0-570.52.1.el9_6, +34 more
    fixed: vendor fix RHSA-2025:17760
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-core 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-modules 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-debug-core 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-debug-modules 5.14.0-70.151.1.rt21.223.el9_0, kernel-rt-modules-extra 5.14.0-70.151.1.rt21.223.el9_0, +2 more
    fixed: vendor fix RHSA-2025:19268
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-core 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-modules 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-debug-core 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-modules-core 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-debug-modules 5.14.0-284.146.1.rt14.431.el9_2, +4 more
    fixed: vendor fix RHSA-2025:21128
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.96.1.el9_4, kernel-rt-core 5.14.0-427.96.1.el9_4, kernel-rt-modules 5.14.0-427.96.1.el9_4, kernel-rt-debug-core 5.14.0-427.96.1.el9_4, kernel-rt-modules-core 5.14.0-427.96.1.el9_4, kernel-rt-debug-modules 5.14.0-427.96.1.el9_4, +4 more
    fixed: vendor fix RHSA-2025:19104
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.7.1.el9_7, kernel-rt 5.14.0-570.52.1.el9_6, kernel-rt-core 5.14.0-611.7.1.el9_7, kernel-rt-kvm 5.14.0-570.52.1.el9_6, kernel-rt-core 5.14.0-570.52.1.el9_6, kernel-rt-modules 5.14.0-611.7.1.el9_7, +16 more
    fixed: vendor fix RHSA-2025:17760
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-kvm 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-core 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-modules 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-debug-kvm 5.14.0-284.146.1.rt14.431.el9_2, kernel-rt-debug-core 5.14.0-284.146.1.rt14.431.el9_2, +6 more
    fixed: vendor fix RHSA-2025:21128
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.96.1.el9_4, kernel-rt-kvm 5.14.0-427.96.1.el9_4, kernel-rt-core 5.14.0-427.96.1.el9_4, kernel-rt-modules 5.14.0-427.96.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.96.1.el9_4, kernel-rt-debug-core 5.14.0-427.96.1.el9_4, +6 more
    fixed: vendor fix RHSA-2025:19104
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-core 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-modules 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-debug-core 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-debug-modules 4.18.0-553.80.1.rt7.421.el8_10, kernel-rt-modules-extra 4.18.0-553.80.1.rt7.421.el8_10, +2 more
    fixed: vendor fix RHSA-2025:18298
  • Red Hat Enterprise Linux Server (v. 7 ELS) perf 3.10.0-1160.142.1.el7, kernel 3.10.0-1160.142.1.el7, bpftool 3.10.0-1160.142.1.el7, python-perf 3.10.0-1160.142.1.el7, kernel-kdump 3.10.0-1160.142.1.el7, kernel-tools 3.10.0-1160.142.1.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debuginfo-common-ppc64 3.10.0-1160.142.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.142.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.142.1.el7
    fixed: vendor fix RHSA-2025:21063
  • 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
9 mo ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 5% 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
NVD 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.