high 7.8

CVE-2022-49063 json

ice: arfs: fix use-after-free when freeing @rx_cpu_rmap

published 2025-02-26 20 mo ago modified 2026-06-17 4 mo ago also EUVD-2022-55141

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 23%
public exploits: 0; none known

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

The CI testing bots triggered the following splat:

[ 718.203054] BUG: KASAN: use-after-free in free_irq_cpu_rmap+0x53/0x80 [ 718.206349] Read of size 4 at addr ffff8881bd127e00 by task sh/20834 [ 718.212852] CPU: 28 PID: 20834 Comm: sh Kdump: loaded Tainted: G S W IOE 5.17.0-rc8_nextqueue-devqueue-02643-g23f3121aca93 #1 [ 718.219695] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0012.070720200218 07/07/2020 [ 718.223418] Call Trace: [ 718.227139] [ 718.230783] dump_stack_lvl+0x33/0x42 [ 718.234431] print_address_description.constprop.9+0x21/0x170 [ 718.238177] ? free_irq_cpu_rmap+0x53/0x80 [ 718.241885] ? free_irq_cpu_rmap+0x53/0x80 [ 718.245539] kasan_report.cold.18+0x7f/0x11b [ 718.249197] ? free_irq_cpu_rmap+0x53/0x80 [ 718.252852] free_irq_cpu_rmap+0x53/0x80 [ 718.256471] ice_free_cpu_rx_rmap.part.11+0x37/0x50 [ice] [ 718.260174] ice_remove_arfs+0x5f/0x70 [ice] [ 718.263810] ice_rebuild_arfs+0x3b/0x70 [ice] [ 718.267419] ice_rebuild+0x39c/0xb60 [ice] [ 718.270974] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 718.274472] ? ice_init_phy_user_cfg+0x360/0x360 [ice] [ 718.278033] ? delay_tsc+0x4a/0xb0 [ 718.281513] ? preempt_count_sub+0x14/0xc0 [ 718.284984] ? delay_tsc+0x8f/0xb0 [ 718.288463] ice_do_reset+0x92/0xf0 [ice] [ 718.292014] ice_pci_err_resume+0x91/0xf0 [ice] [ 718.295561] pci_reset_function+0x53/0x80 <...> [ 718.393035] Allocated by task 690: [ 718.433497] Freed by task 20834: [ 718.495688] Last potentially related work creation: [ 718.568966] The buggy address belongs to the object at ffff8881bd127e00 which belongs to the cache kmalloc-96 of size 96 [ 718.574085] The buggy address is located 0 bytes inside of 96-byte region [ffff8881bd127e00, ffff8881bd127e60) [ 718.579265] The buggy address belongs to the page: [ 718.598905] Memory state around the buggy address: [ 718.601809] ffff8881bd127d00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 718.604796] ffff8881bd127d80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 718.607794] >ffff8881bd127e00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 718.610811] ^ [ 718.613819] ffff8881bd127e80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 718.617107] ffff8881bd127f00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc

This is due to that free_irq_cpu_rmap() is always being called *after* (devm_)free_irq() and thus it tries to work with IRQ descs already freed. For example, on device reset the driver frees the rmap right before allocating a new one (the splat above). Make rmap creation and freeing function symmetrical with {request,free}_irq() calls i.e. do that on ifup/ifdown instead of device probe/remove/resume. These operations can be performed independently from the actual device aRFS configuration. Also, make sure ice_vsi_free_irq() clears IRQ affinity notifiers only when aRFS is disabled -- otherwise, CPU rmap sets and clears its own and they must not be touched manually.

Patch / fix

fixed in 1 distros 4 links 4

Linux Linux 5.10.238, 5.15.184, 5.17.4, 5.18

debian ubuntu red hat suse

linux Debian 14, Debian 13, Debian 12 5.17.6-1

debian advisories DEBIAN-CVE-2022-49063

linux Ubuntu 22.04 LTS 5.15.0-144.157
linux-aws Ubuntu 22.04 LTS 5.15.0-1088.95
linux-gcp Ubuntu 22.04 LTS 5.15.0-1087.96
linux-gke Ubuntu 22.04 LTS 5.15.0-1085.91
linux-ibm Ubuntu 22.04 LTS 5.15.0-1080.83
linux-kvm Ubuntu 22.04 LTS 5.15.0-1084.89
linux-azure Ubuntu 22.04 LTS 5.15.0-1094.103
linux-gkeop Ubuntu 22.04 LTS 5.15.0-1070.78

ubuntu advisories UBUNTU-CVE-2022-49063

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 5.14.0-70.26.1.el9_0
perf RHEL 9 5.14.0-70.26.1.el9_0
bpftool RHEL 9 5.14.0-70.26.1.el9_0
kernel-core RHEL 9 5.14.0-70.26.1.el9_0
kernel-tools RHEL 9 5.14.0-70.26.1.el9_0
python3-perf RHEL 9 5.14.0-70.26.1.el9_0
kernel-modules RHEL 9 5.14.0-70.26.1.el9_0
kernel-zfcpdump RHEL 9 5.14.0-70.26.1.el9_0

red hat advisories RHSA-2022:6610 RHSA-2022:7683

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-2025:1263-1 SUSE-SU-2025:1241-1 SUSE-SU-2025:1194-1 SUSE-SU-2025:1183-1 SUSE-SU-2025:1176-1 SUSE-SU-2025:1027-1

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-2022-49063 updated 2026-11-05 cvss 6.7

kernel: ice: arfs: fix use-after-free when freeing @rx_cpu_rmap

Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +6 more
affected: no fix planned “Out of support scope”
Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-425.3.1.el8, kernel-debuginfo-common-aarch64 4.18.0-425.3.1.el8, kernel-debuginfo-common-ppc64le 4.18.0-425.3.1.el8
fixed: vendor fix RHSA-2022:7683
Red Hat CodeReady Linux Builder (v. 9) kernel-debuginfo-common-s390x 5.14.0-70.26.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.26.1.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.26.1.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.26.1.el9_0 Red Hat Enterprise Linux AppStream (v. 9) perf 5.14.0-70.26.1.el9_0, kernel-devel-matched 5.14.0-70.26.1.el9_0, kernel-debug-devel-matched 5.14.0-70.26.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.26.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.26.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.26.1.el9_0, +2 more
fixed: vendor fix RHSA-2022:6610
Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-425.3.1.el8, kernel 4.18.0-425.3.1.el8, bpftool 4.18.0-425.3.1.el8, kernel-core 4.18.0-425.3.1.el8, kernel-tools 4.18.0-425.3.1.el8, python3-perf 4.18.0-425.3.1.el8, +15 more
fixed: vendor fix RHSA-2022:7683
Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-70.26.1.el9_0, bpftool 5.14.0-70.26.1.el9_0, kernel-core 5.14.0-70.26.1.el9_0, kernel-tools 5.14.0-70.26.1.el9_0, python3-perf 5.14.0-70.26.1.el9_0, kernel-modules 5.14.0-70.26.1.el9_0, +14 more
fixed: vendor fix RHSA-2022:6610
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more 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 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: 20 mo ago (2025-02-27)

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
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
CNA	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

CWE-416 Use After Free

Technology feeds

Linux kernel rss critical rss

References

git.kernel.org /stable/c/ba2f6ec28733fb6b24ed086e676df3df4c138f3f
patch
git.kernel.org /stable/c/618df75f2e30c7838a3e010ca32cd4893ec9fe33
patch
git.kernel.org /stable/c/d08d2fb6d99d82da1c63aba5c0d1c6f237e150f3
patch
git.kernel.org /stable/c/d7442f512b71fc63a99c8a801422dde4fbbf9f93
patch
lists.debian.org /debian-lts-announce/2025/10/msg00007.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2022-49063
NVD CVE-2022-49063

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.

Summary