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Fencer Vulns
high 7.8

CVE-2023-53539 json

RDMA/rxe: Fix incomplete state save in rxe_requester

published 2025-10-04 13 mo ago modified 2026-08-05 3 mo ago also EUVD-2025-32332

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 6%
public exploits
0
none known

Summary

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

RDMA/rxe: Fix incomplete state save in rxe_requester

If a send packet is dropped by the IP layer in rxe_requester() the call to rxe_xmit_packet() can fail with err == -EAGAIN. To recover, the state of the wqe is restored to the state before the packet was sent so it can be resent. However, the routines that save and restore the state miss a significnt part of the variable state in the wqe, the dma struct which is used to process through the sge table. And, the state is not saved before the packet is built which modifies the dma struct.

Under heavy stress testing with many QPs on a fast node sending large messages to a slow node dropped packets are observed and the resent packets are corrupted because the dma struct was not restored. This patch fixes this behavior and allows the test cases to succeed.

Patch / fix

  • Linux Linux 6.1.53, 6.4.16, 6.5.3, 6.6
  • linux Debian 12 6.1.55-1
  • linux Debian 14, Debian 13 6.5.3-1

debian advisories DEBIAN-CVE-2023-53539

  • kernel-rt RHEL 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-kvm RHEL 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-core RHEL 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-modules RHEL 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-debug-kvm RHEL 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-debug-core RHEL 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-debug-modules RHEL 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-modules-extra RHEL 8 4.18.0-553.89.1.rt7.430.el8_10

red hat advisories RHSA-2026:10756RHSA-2026:9870RHSA-2026:5691RHSA-2026:3360RHSA-2026:2664RHSA-2026:1495

  • kernel-64kb SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS, SLE High Performance Computing 15 SP5-ESPOS 5.14.21-150500.55.127.1
  • kernel-syms SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.127.1
  • kernel-source SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.127.1
  • kernel-default SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 5.14.21-150500.55.127.1
  • kernel-obs-build SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.127.1
  • kernel-default-base SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.127.1.150500.6.61.1
  • kernel-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.58.1
  • kernel-syms-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.58.1

suse advisories SUSE-SU-2025:4320-1SUSE-SU-2025:4301-1SUSE-SU-2025:21052-1SUSE-SU-2025:21064-1SUSE-SU-2025:4149-1SUSE-SU-2025:4141-1

  • kernel-rt AlmaLinux 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel AlmaLinux 8 4.18.0-553.89.1.el8_10

almalinux advisories ALSA-2025:22800ALSA-2025:22801

  • kernel-rt Rocky Linux 8 4.18.0-553.89.1.rt7.430.el8_10
  • kernel Rocky Linux 8 4.18.0-553.89.1.el8_10

rocky linux advisories RLSA-2025:22800RLSA-2025:22801

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-2023-53539 updated cvss 5.5

kernel: RDMA/rxe: Fix incomplete state save in rxe_requester

  • 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 “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.”
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.13.1.el9_4, perf 5.14.0-427.13.1.el9_4, rtla 5.14.0-427.13.1.el9_4, kernel-devel-matched 5.14.0-427.13.1.el9_4, kernel-64k-devel-matched 5.14.0-427.13.1.el9_4, kernel-debug-devel-matched 5.14.0-427.13.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2024:2394
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.163.1.el9_0, kernel-devel-matched 5.14.0-70.163.1.el9_0, kernel-debug-devel-matched 5.14.0-70.163.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.163.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.163.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.163.1.el9_0, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:1494
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.152.1.el9_2, rtla 5.14.0-284.152.1.el9_2, kernel-devel-matched 5.14.0-284.152.1.el9_2, kernel-64k-devel-matched 5.14.0-284.152.1.el9_2, kernel-debug-devel-matched 5.14.0-284.152.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.152.1.el9_2, +5 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:0535
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.89.1.el8_10, kernel 4.18.0-553.89.1.el8_10, bpftool 4.18.0-553.89.1.el8_10, kernel-core 4.18.0-553.89.1.el8_10, kernel-tools 4.18.0-553.89.1.el8_10, python3-perf 4.18.0-553.89.1.el8_10, +15 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2025:22801
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.13.1.el9_4, kernel 5.14.0-427.13.1.el9_4, kernel-64k 5.14.0-427.13.1.el9_4, kernel-core 5.14.0-427.13.1.el9_4, kernel-tools 5.14.0-427.13.1.el9_4, python3-perf 5.14.0-427.13.1.el9_4, +28 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2024:2394
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.185.1.el8_2, kernel 4.18.0-193.185.1.el8_2, bpftool 4.18.0-193.185.1.el8_2, kernel-core 4.18.0-193.185.1.el8_2, kernel-tools 4.18.0-193.185.1.el8_2, python3-perf 4.18.0-193.185.1.el8_2, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:2664
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.186.1.el8_4, kernel 4.18.0-305.186.1.el8_4, bpftool 4.18.0-305.186.1.el8_4, kernel-core 4.18.0-305.186.1.el8_4, kernel-tools 4.18.0-305.186.1.el8_4, python3-perf 4.18.0-305.186.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:3360
show 18 more
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.el8_6, +15 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:5691
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.126.1.el8_8, kernel 4.18.0-477.126.1.el8_8, bpftool 4.18.0-477.126.1.el8_8, kernel-core 4.18.0-477.126.1.el8_8, kernel-tools 4.18.0-477.126.1.el8_8, python3-perf 4.18.0-477.126.1.el8_8, +9 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:1445
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.163.1.el9_0, bpftool 5.14.0-70.163.1.el9_0, kernel-core 5.14.0-70.163.1.el9_0, kernel-tools 5.14.0-70.163.1.el9_0, python3-perf 5.14.0-70.163.1.el9_0, kernel-modules 5.14.0-70.163.1.el9_0, +14 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:1494
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.152.1.el9_2, kernel 5.14.0-284.152.1.el9_2, kernel-64k 5.14.0-284.152.1.el9_2, kernel-core 5.14.0-284.152.1.el9_2, kernel-tools 5.14.0-284.152.1.el9_2, python3-perf 5.14.0-284.152.1.el9_2, +28 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:0535
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.186.1.el8_4, kernel 4.18.0-305.186.1.el8_4, bpftool 4.18.0-305.186.1.el8_4, kernel-core 4.18.0-305.186.1.el8_4, kernel-tools 4.18.0-305.186.1.el8_4, python3-perf 4.18.0-305.186.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:3360
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.el8_6, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:5691
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.126.1.el8_8, kernel 4.18.0-477.126.1.el8_8, bpftool 4.18.0-477.126.1.el8_8, kernel-core 4.18.0-477.126.1.el8_8, kernel-tools 4.18.0-477.126.1.el8_8, python3-perf 4.18.0-477.126.1.el8_8, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:1445
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.89.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.89.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.89.1.el8_10
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2025:22801
  • Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.13.1.el9_4
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2024:2394
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.148.1.rt56.1300.el7, kernel-rt-trace 3.10.0-1160.148.1.rt56.1300.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.148.1.rt56.1300.el7
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:10756
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-kvm 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-core 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-modules 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-debug-kvm 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-debug-core 4.18.0-553.89.1.rt7.430.el8_10, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2025:22800
  • Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-kvm 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2024:2394
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-kvm 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-kvm 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-core 5.14.0-70.163.1.rt21.235.el9_0, +4 more Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules-extra 5.14.0-70.163.1.rt21.235.el9_0, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:1495
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-core 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-modules 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-core 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-modules-core 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-modules 5.14.0-284.152.1.rt14.437.el9_2, +4 more Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-kvm 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-core 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-modules 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-kvm 5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-core 5.14.0-284.152.1.rt14.437.el9_2, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:0534
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-core 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-modules 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-debug-core 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-debug-modules 4.18.0-553.89.1.rt7.430.el8_10, kernel-rt-modules-extra 4.18.0-553.89.1.rt7.430.el8_10, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2025:22800
  • Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, kernel-rt-modules-core 5.14.0-427.13.1.el9_4, kernel-rt-debug-modules 5.14.0-427.13.1.el9_4, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2024:2394
  • Red Hat Enterprise Linux Server (v. 7 ELS) perf 3.10.0-1160.148.1.el7, kernel 3.10.0-1160.148.1.el7, bpftool 3.10.0-1160.148.1.el7, python-perf 3.10.0-1160.148.1.el7, kernel-kdump 3.10.0-1160.148.1.el7, kernel-tools 3.10.0-1160.148.1.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debuginfo-common-ppc64 3.10.0-1160.148.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.148.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.148.1.el7
    fixed: vendor fix “To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules.” RHSA-2026:9870
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more 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
partial
Assessed
4 mo ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% 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
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

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.