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Fencer Vulns
high 7.8

CVE-2025-21883 json

ice: Fix deinitializing VF in error path

published 2025-03-27 19 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-8478

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

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

ice: Fix deinitializing VF in error path

If ice_ena_vfs() fails after calling ice_create_vf_entries(), it frees all VFs without removing them from snapshot PF-VF mailbox list, leading to list corruption.

Reproducer: devlink dev eswitch set $PF1_PCI mode switchdev ip l s $PF1 up ip l s $PF1 promisc on sleep 1 echo 1 > /sys/class/net/$PF1/device/sriov_numvfs sleep 1 echo 1 > /sys/class/net/$PF1/device/sriov_numvfs

Trace (minimized): list_add corruption. next->prev should be prev (ffff8882e241c6f0), but was 0000000000000000. (next=ffff888455da1330). kernel BUG at lib/list_debug.c:29! RIP: 0010:__list_add_valid_or_report+0xa6/0x100 ice_mbx_init_vf_info+0xa7/0x180 [ice] ice_initialize_vf_entry+0x1fa/0x250 [ice] ice_sriov_configure+0x8d7/0x1520 [ice] ? __percpu_ref_switch_mode+0x1b1/0x5d0 ? __pfx_ice_sriov_configure+0x10/0x10 [ice]

Sometimes a KASAN report can be seen instead with a similar stack trace: BUG: KASAN: use-after-free in __list_add_valid_or_report+0xf1/0x100

VFs are added to this list in ice_mbx_init_vf_info(), but only removed in ice_free_vfs(). Move the removing to ice_free_vf_entries(), which is also being called in other places where VFs are being removed (including ice_free_vfs() itself).

Patch / fix

  • Linux Linux 6.6.81, 6.12.18, 6.13.6, 6.14
  • linux Debian 14, Debian 13 6.12.19-1

debian advisories DEBIAN-CVE-2025-21883

  • linux Ubuntu 24.04 LTS 6.8.0-84.84
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1039.41
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1040.42
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1036.40
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1037.37
  • linux-azure Ubuntu 24.04 LTS 6.8.0-1038.44
  • linux-gkeop Ubuntu 24.04 LTS 6.8.0-1023.25
  • linux-raspi Ubuntu 24.04 LTS 6.8.0-1039.43

ubuntu advisories UBUNTU-CVE-2025-21883

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 10.0 6.12.0-55.19.1.el10_0
  • rv RHEL 10.0 6.12.0-55.19.1.el10_0
  • perf RHEL 10.0 6.12.0-55.19.1.el10_0
  • rtla RHEL 10.0 6.12.0-55.19.1.el10_0
  • libperf RHEL 10.0 6.12.0-55.19.1.el10_0
  • kernel-rt RHEL 10.0 6.12.0-55.19.1.el10_0
  • kernel-64k RHEL 10.0 6.12.0-55.19.1.el10_0
  • kernel-core RHEL 10.0 6.12.0-55.19.1.el10_0

red hat advisories RHSA-2025:9896RHSA-2025:9302

  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.3.1
  • kernel-syms-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.3.1
  • kernel-source-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.3.1
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.3.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.3.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.3.1
  • kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.3.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.3.1

suse advisories SUSE-SU-2025:01967-1SUSE-SU-2025:01951-1SUSE-SU-2025:01919-1SUSE-SU-2025:20192-1SUSE-SU-2025:20270-1SUSE-SU-2025:20190-1

  • kernel-abi-stablelists AlmaLinux 10 6.12.0-55.19.1.el10_0
  • kernel AlmaLinux 9 5.14.0-570.23.1.el9_6
  • rv AlmaLinux 9 5.14.0-570.23.1.el9_6
  • perf AlmaLinux 9 5.14.0-570.23.1.el9_6
  • rtla AlmaLinux 9 5.14.0-570.23.1.el9_6
  • libperf AlmaLinux 9 5.14.0-570.23.1.el9_6
  • kernel-rt AlmaLinux 9 5.14.0-570.23.1.el9_6
  • kernel-64k AlmaLinux 9 5.14.0-570.23.1.el9_6

almalinux advisories ALSA-2025:9896ALSA-2025:9302

  • kernel Rocky Linux 9 5.14.0-570.23.1.el9_6

rocky linux advisories RLSA-2025:9302

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-2025-21883 updated cvss 6.7

kernel: ice: Fix deinitializing VF in error path

  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-570.23.1.el9_6, perf 5.14.0-570.23.1.el9_6, rtla 5.14.0-570.23.1.el9_6, python3-perf 5.14.0-570.23.1.el9_6, kernel-devel-matched 5.14.0-570.23.1.el9_6, kernel-64k-devel-matched 5.14.0-570.23.1.el9_6, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9302
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-55.19.1.el10_0, perf 6.12.0-55.19.1.el10_0, rtla 6.12.0-55.19.1.el10_0, python3-perf 6.12.0-55.19.1.el10_0, kernel-devel-matched 6.12.0-55.19.1.el10_0, kernel-64k-devel-matched 6.12.0-55.19.1.el10_0, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9896
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-570.23.1.el9_6, kernel-64k 5.14.0-570.23.1.el9_6, kernel-core 5.14.0-570.23.1.el9_6, kernel-tools 5.14.0-570.23.1.el9_6, kernel-modules 5.14.0-570.23.1.el9_6, kernel-64k-core 5.14.0-570.23.1.el9_6, +27 more
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9302
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-55.19.1.el10_0, kernel-64k 6.12.0-55.19.1.el10_0, kernel-core 6.12.0-55.19.1.el10_0, kernel-tools 6.12.0-55.19.1.el10_0, kernel-modules 6.12.0-55.19.1.el10_0, kernel-64k-core 6.12.0-55.19.1.el10_0, +27 more
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9896
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-570.23.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.23.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.23.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.23.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.23.1.el9_6
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9302
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-55.19.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.19.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.19.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.19.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.19.1.el10_0
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9896
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-570.23.1.el9_6, kernel-rt-64k 5.14.0-570.23.1.el9_6, kernel-rt-core 5.14.0-570.23.1.el9_6, kernel-rt-modules 5.14.0-570.23.1.el9_6, kernel-rt-64k-core 5.14.0-570.23.1.el9_6, kernel-rt-debug-core 5.14.0-570.23.1.el9_6, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9302
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-55.19.1.el10_0, kernel-rt-64k 6.12.0-55.19.1.el10_0, kernel-rt-core 6.12.0-55.19.1.el10_0, kernel-rt-modules 6.12.0-55.19.1.el10_0, kernel-rt-64k-core 6.12.0-55.19.1.el10_0, kernel-rt-debug-core 6.12.0-55.19.1.el10_0, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9896
show 3 more
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-570.23.1.el9_6, kernel-rt-kvm 5.14.0-570.23.1.el9_6, kernel-rt-core 5.14.0-570.23.1.el9_6, kernel-rt-modules 5.14.0-570.23.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.23.1.el9_6, kernel-rt-debug-core 5.14.0-570.23.1.el9_6, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9302
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-55.19.1.el10_0, kernel-rt-kvm 6.12.0-55.19.1.el10_0, kernel-rt-core 6.12.0-55.19.1.el10_0, kernel-rt-modules 6.12.0-55.19.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.19.1.el10_0, kernel-rt-debug-core 6.12.0-55.19.1.el10_0, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module ice from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2025:9896
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    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

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
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.