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Fencer Intel
high 7.8

CVE-2026-45852 json

RDMA/rxe: Fix double free in rxe_srq_from_init

published 5mo ago modified 21d ago also EUVD-2026-32318

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 9%
public exploits
0
none known

Summary

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

RDMA/rxe: Fix double free in rxe_srq_from_init

In rxe_srq_from_init(), the queue pointer 'q' is assigned to 'srq->rq.queue' before copying the SRQ number to user space. If copy_to_user() fails, the function calls rxe_queue_cleanup() to free the queue, but leaves the now-invalid pointer in 'srq->rq.queue'.

The caller of rxe_srq_from_init() (rxe_create_srq) eventually calls rxe_srq_cleanup() upon receiving the error, which triggers a second rxe_queue_cleanup() on the same memory, leading to a double free.

The call trace looks like this: kmem_cache_free+0x.../0x... rxe_queue_cleanup+0x1a/0x30 [rdma_rxe] rxe_srq_cleanup+0x42/0x60 [rdma_rxe] rxe_elem_release+0x31/0x70 [rdma_rxe] rxe_create_srq+0x12b/0x1a0 [rdma_rxe] ib_create_srq_user+0x9a/0x150 [ib_core]

Fix this by moving 'srq->rq.queue = q' after copy_to_user.

Patch / fix

  • Linux Linux 4.20, 7.0
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:3.10.0-1160.154.1.el7, 0:3.10.0-1160.155.1.rt56.1307.el7
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.132.1.el8_10, 0:4.18.0-553.132.1.rt7.473.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.197.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.18.0-305.197.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.18.0-372.198.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.18.0-372.198.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.150.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.150.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.15.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.14.0-427.134.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.125.1.el9_6
  • linux Debian 12 6.1.170-1
  • linux Debian 13 6.12.85-1
  • linux Debian 14 6.18.14-1

debian advisories DEBIAN-CVE-2026-45852

  • linux Ubuntu 22.04 LTS 5.15.0-186.196
  • linux Ubuntu 24.04 LTS 6.8.0-134.134
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1060.63
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1063.69
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1108.114
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1058.64

ubuntu advisories UBUNTU-CVE-2026-45852

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

  • kpatch-patch-5_14_0-687_10_1 RHEL 9 1-9.el9_8
  • kpatch-patch-4_18_0-553_85_1 RHEL 8 1-14.el8_10
  • kpatch-patch-4_18_0-553_72_1 RHEL 8 1-16.el8_10
  • kpatch-patch-4_18_0-553_109_1 RHEL 8 1-12.el8_10
  • kpatch-patch-4_18_0-553_125_1 RHEL 8 1-9.el8_10
  • kpatch-patch-4_18_0-553_158_1 RHEL 8 1-1.el8_10
  • kernel RHEL 9 5.14.0-687.15.1.el9_8
  • rv RHEL 9 5.14.0-687.15.1.el9_8

red hat advisories RHSA-2026:72832RHSA-2026:72830RHSA-2026:72630RHSA-2026:72629RHSA-2026:72627RHSA-2026:41236

  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-48.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-48.1
  • kernel-rt Real Time Module 15 SP7 6.4.0-150700.7.59.2
  • kernel-syms-rt Real Time Module 15 SP7 6.4.0-150700.7.59.1
  • kernel-source-rt Real Time Module 15 SP7 6.4.0-150700.7.59.2
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.60.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.60.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.60.1

suse advisories SUSE-SU-2026:22433-1SUSE-SU-2026:22458-1SUSE-SU-2026:2591-1SUSE-SU-2026:2482-1SUSE-SU-2026:2450-1SUSE-SU-2026:2421-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.35.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.35.1

opensuse advisories openSUSE-SU-2026:20965-1

  • kernel AlmaLinux 9 5.14.0-687.15.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.15.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.15.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.15.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.15.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.15.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.15.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.15.1.el9_8

almalinux advisories ALSA-2026:25217ALSA-2026:25120ALSA-2026:25121

  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_7.cloud.1.0
  • kernel Rocky Linux 8 4.18.0-553.132.1.el8_10.cloud.0.1
  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_8
  • kernel-rt Rocky Linux 8 4.18.0-553.132.1.rt7.473.el8_10
  • kernel Rocky Linux 8 4.18.0-553.132.1.el8_10

rocky linux advisories RXSA-2026:25217RXSA-2026:25121RLSA-2026:25217RLSA-2026:25120RLSA-2026:25121

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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-2026-45852 updated cvss 7.0

kernel: RDMA/rxe: Fix double free in rxe_srq_from_init

  • 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.9.6) libperf 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.125.1.el9_6
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.15.1.el9_8, perf 5.14.0-687.15.1.el9_8, rtla 5.14.0-687.15.1.el9_8, python3-perf 5.14.0-687.15.1.el9_8, kernel-devel-matched 5.14.0-687.15.1.el9_8, kernel-64k-devel-matched 5.14.0-687.15.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.134.1.el9_4, perf 5.14.0-427.134.1.el9_4, rtla 5.14.0-427.134.1.el9_4, kernel-devel-matched 5.14.0-427.134.1.el9_4, kernel-64k-devel-matched 5.14.0-427.134.1.el9_4, kernel-debug-devel-matched 5.14.0-427.134.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:27713
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.125.1.el9_6, perf 5.14.0-570.125.1.el9_6, rtla 5.14.0-570.125.1.el9_6, python3-perf 5.14.0-570.125.1.el9_6, kernel-devel-matched 5.14.0-570.125.1.el9_6, kernel-64k-devel-matched 5.14.0-570.125.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.132.1.el8_10, kernel 4.18.0-553.132.1.el8_10, bpftool 4.18.0-553.132.1.el8_10, kernel-core 4.18.0-553.132.1.el8_10, kernel-tools 4.18.0-553.132.1.el8_10, python3-perf 4.18.0-553.132.1.el8_10, +20 more
    fixed: vendor fix RHSA-2026:25121
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.15.1.el9_8, kernel-64k 5.14.0-687.15.1.el9_8, kernel-core 5.14.0-687.15.1.el9_8, kernel-tools 5.14.0-687.15.1.el9_8, kernel-modules 5.14.0-687.15.1.el9_8, kernel-64k-core 5.14.0-687.15.1.el9_8, +28 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.197.1.el8_4, kernel 4.18.0-305.197.1.el8_4, bpftool 4.18.0-305.197.1.el8_4, kernel-core 4.18.0-305.197.1.el8_4, kernel-tools 4.18.0-305.197.1.el8_4, python3-perf 4.18.0-305.197.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:35896
show 20 more
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.198.1.el8_6, kernel 4.18.0-372.198.1.el8_6, bpftool 4.18.0-372.198.1.el8_6, kernel-core 4.18.0-372.198.1.el8_6, kernel-tools 4.18.0-372.198.1.el8_6, python3-perf 4.18.0-372.198.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:33899
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.150.1.el8_8, kernel 4.18.0-477.150.1.el8_8, bpftool 4.18.0-477.150.1.el8_8, kernel-core 4.18.0-477.150.1.el8_8, kernel-tools 4.18.0-477.150.1.el8_8, python3-perf 4.18.0-477.150.1.el8_8, +14 more
    fixed: vendor fix RHSA-2026:35863
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.134.1.el9_4, kernel 5.14.0-427.134.1.el9_4, kernel-64k 5.14.0-427.134.1.el9_4, kernel-core 5.14.0-427.134.1.el9_4, kernel-tools 5.14.0-427.134.1.el9_4, python3-perf 5.14.0-427.134.1.el9_4, +33 more
    fixed: vendor fix RHSA-2026:27713
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.125.1.el9_6, kernel-64k 5.14.0-570.125.1.el9_6, kernel-core 5.14.0-570.125.1.el9_6, kernel-tools 5.14.0-570.125.1.el9_6, kernel-modules 5.14.0-570.125.1.el9_6, kernel-64k-core 5.14.0-570.125.1.el9_6, +32 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.197.1.el8_4, kernel 4.18.0-305.197.1.el8_4, bpftool 4.18.0-305.197.1.el8_4, kernel-core 4.18.0-305.197.1.el8_4, kernel-tools 4.18.0-305.197.1.el8_4, python3-perf 4.18.0-305.197.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:35896
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.198.1.el8_6, kernel 4.18.0-372.198.1.el8_6, bpftool 4.18.0-372.198.1.el8_6, kernel-core 4.18.0-372.198.1.el8_6, kernel-tools 4.18.0-372.198.1.el8_6, python3-perf 4.18.0-372.198.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:33899
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.150.1.el8_8, kernel 4.18.0-477.150.1.el8_8, bpftool 4.18.0-477.150.1.el8_8, kernel-core 4.18.0-477.150.1.el8_8, kernel-tools 4.18.0-477.150.1.el8_8, python3-perf 4.18.0-477.150.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:35863
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.15.1.el9_8
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.132.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.132.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.132.1.el8_10
    fixed: vendor fix RHSA-2026:25121
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-trace 3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.155.1.rt56.1307.el7
    fixed: vendor fix RHSA-2026:41236
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-kvm 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-core 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-modules 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-kvm 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-core 4.18.0-553.132.1.rt7.473.el8_10, +4 more
    fixed: vendor fix RHSA-2026:25120
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-64k 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-64k-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.134.1.el9_4, kernel-rt-core 5.14.0-427.134.1.el9_4, kernel-rt-modules 5.14.0-427.134.1.el9_4, kernel-rt-debug-core 5.14.0-427.134.1.el9_4, kernel-rt-modules-core 5.14.0-427.134.1.el9_4, kernel-rt-debug-modules 5.14.0-427.134.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:27713
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.125.1.el9_6, kernel-rt-64k 5.14.0-570.125.1.el9_6, kernel-rt-core 5.14.0-570.125.1.el9_6, kernel-rt-modules 5.14.0-570.125.1.el9_6, kernel-rt-64k-core 5.14.0-570.125.1.el9_6, kernel-rt-debug-core 5.14.0-570.125.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, kernel-rt-modules-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-modules 5.14.0-687.15.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.134.1.el9_4, kernel-rt-kvm 5.14.0-427.134.1.el9_4, kernel-rt-core 5.14.0-427.134.1.el9_4, kernel-rt-modules 5.14.0-427.134.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.134.1.el9_4, kernel-rt-debug-core 5.14.0-427.134.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:27713
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.125.1.el9_6, kernel-rt-kvm 5.14.0-570.125.1.el9_6, kernel-rt-core 5.14.0-570.125.1.el9_6, kernel-rt-modules 5.14.0-570.125.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.125.1.el9_6, kernel-rt-debug-core 5.14.0-570.125.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-core 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-modules 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-core 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-modules 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-modules-extra 4.18.0-553.132.1.rt7.473.el8_10, +2 more
    fixed: vendor fix RHSA-2026:25120
  • Red Hat Enterprise Linux Server (v. 7 ELS) perf 3.10.0-1160.154.1.el7, kernel 3.10.0-1160.154.1.el7, bpftool 3.10.0-1160.154.1.el7, python-perf 3.10.0-1160.154.1.el7, kernel-kdump 3.10.0-1160.154.1.el7, kernel-tools 3.10.0-1160.154.1.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debuginfo-common-ppc64 3.10.0-1160.154.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.154.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.154.1.el7
    fixed: vendor fix RHSA-2026:35844
  • 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
total
Assessed
24d ago

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-1341 Multiple Releases of Same Resource or Handle
  • CWE-415 Double Free
Technology feeds

References

Sources

Fencer Intel 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.