CVE-2023-52831
published 2024-05-21CVE-2023-52831: In the Linux kernel, the following vulnerability has been resolved: cpu/hotplug: Don't offline the last non-isolated CPU If a system has isolated CPUs via the…
PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.1th percentile
In the Linux kernel, the following vulnerability has been resolved:
cpu/hotplug: Don't offline the last non-isolated CPU
If a system has isolated CPUs via the "isolcpus=" command line parameter,
then an attempt to offline the last housekeeping CPU will result in a
WARN_ON() when rebuilding the scheduler domains and a subsequent panic due
to and unhandled empty CPU mas in partition_sched_domains_locked().
cpuset_hotplug_workfn()
rebuild_sched_domains_locked()
ndoms = generate_sched_domains(&doms, &attr);
cpumask_and(doms[0], top_cpuset.effective_cpus, housekeeping_cpumask(HK_FLAG_DOMAIN));
Thus results in an empty CPU mask which triggers the warning and then the
subsequent crash:
WARNING: CPU: 4 PID: 80 at kernel/sched/topology.c:2366 build_sched_domains+0x120c/0x1408
Call trace:
build_sched_domains+0x120c/0x1408
partition_sched_domains_locked+0x234/0x880
rebuild_sched_domains_locked+0x37c/0x798
rebuild_sched_domains+0x30/0x58
cpuset_hotplug_workfn+0x2a8/0x930
Unable to handle kernel paging request at virtual address fffe80027ab37080
partition_sched_domains_locked+0x318/0x880
rebuild_sched_domains_locked+0x37c/0x798
Aside of the resulting crash, it does not make any sense to offline the last
last housekeeping CPU.
Prevent this by masking out the non-housekeeping CPUs when selecting a
target CPU for initiating the CPU unplug operation via the work queue.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.64-1 (bookworm) | linux 6.1.64-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 07f9e0c9987bf1c4ef57611ad2f789ba68978102 < 335a47ed71e332c82339d1aec0c7f6caccfcda13 | 335a47ed71e332c82339d1aec0c7f6caccfcda13 |
| linux | linux | >= 2b8272ff4a70b866106ae13c36be7ecbef5d5da2 < 3073f6df783d9d75f7f69f73e16c7ef85d6cfb63 | 3073f6df783d9d75f7f69f73e16c7ef85d6cfb63 |
| linux | linux | >= 2b8272ff4a70b866106ae13c36be7ecbef5d5da2 < 38685e2a0476127db766f81b1c06019ddc4c9ffa | 38685e2a0476127db766f81b1c06019ddc4c9ffa |
| linux | linux | >= 6.1.53 < 6.1.64 | 6.1.64 |
| linux | linux | >= 6.4.16 < 6.5 | 6.5 |
| linux | linux | >= 6.5.3 < 6.5.13 | 6.5.13 |
| linux | linux | >= fea9dd8653ff39ce383c54e747bde4c39289b4ad < 3410b702354702b500bde10e3cc1f9db8731d908 | 3410b702354702b500bde10e3cc1f9db8731d908 |
| linux | linux_kernel | < 6.1.64 | 6.1.64 |
| linux | linux_kernel | >= 0 < 6.1.64-1 | 6.1.64-1 |
| linux | linux_kernel | >= 0 < 6.5.13-1 | 6.5.13-1 |
| linux | linux_kernel | >= 0 < 6.5.13-1 | 6.5.13-1 |
| linux | linux_kernel | >= 6.2 < 6.5.13 | 6.5.13 |
| linux | linux_kernel | >= 6.6 < 6.6.3 | 6.6.3 |
| msrc | cbl2_kernel_5.15.186.1-1_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: cpu/hotplug: Don't offline the last non-isolated CPU
vendor_redhat·2024-05-21·CVSS 5.5
CVE-2023-52831 [MEDIUM] CWE-99 kernel: cpu/hotplug: Don't offline the last non-isolated CPU
kernel: cpu/hotplug: Don't offline the last non-isolated CPU
In the Linux kernel, the following vulnerability has been resolved:
cpu/hotplug: Don't offline the last non-isolated CPU
If a system has isolated CPUs via the "isolcpus=" command line parameter,
then an attempt to offline the last housekeeping CPU will result in a
WARN_ON() when rebuilding the scheduler domains and a subsequent panic due
to and unhandled empty CPU mas in partition_sched_domains_locked().
cpuset_hotplug_workfn()
rebuild_sched_domains_locked()
ndoms = generate_sched_domains(&doms, &attr);
cpumask_and(doms[0], top_cpuset.effective_cpus, housekeeping_cpumask(HK_FLAG_DOMAIN));
Thus results in an empty CPU mask which triggers the warning and then the
subsequent crash:
WARNING: CPU: 4 PID: 80 at kernel/sched/topology.c
Microsoft
cpu/hotplug: Don't offline the last non-isolated CPU
vendor_msrc·2024-05-14·CVSS 5.5
CVE-2023-52831 [MEDIUM] CWE-617 cpu/hotplug: Don't offline the last non-isolated CPU
cpu/hotplug: Don't offline the last non-isolated CPU
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Debian
CVE-2023-52831: linux - In the Linux kernel, the following vulnerability has been resolved: cpu/hotplug...
vendor_debian·2023·CVSS 5.5
CVE-2023-52831 [MEDIUM] CVE-2023-52831: linux - In the Linux kernel, the following vulnerability has been resolved: cpu/hotplug...
In the Linux kernel, the following vulnerability has been resolved: cpu/hotplug: Don't offline the last non-isolated CPU If a system has isolated CPUs via the "isolcpus=" command line parameter, then an attempt to offline the last housekeeping CPU will result in a WARN_ON() when rebuilding the scheduler domains and a subsequent panic due to and unhandled empty CPU mas in partition_sched_domains_locked(). cpuset_hotplug_workfn() rebuild_sched_domains_locked() ndoms = generate_sched_domains(&doms, &attr); cpumask_and(doms[0], top_cpuset.effective_cpus, housekeeping_cpumask(HK_FLAG_DOMAIN)); Thus results in an empty CPU mask which triggers the warning and then the subsequent crash: WARNING: CPU: 4 PID: 80 at kernel/sched/topology.c:2366 build_sched_domains+0x120c/0x1408 Call trace: build_sche
OSV
CVE-2023-52831: In the Linux kernel, the following vulnerability has been resolved: cpu/hotplug: Don't offline the last non-isolated CPU If a system has isolated CPUs
osv·2024-05-21·CVSS 5.5
CVE-2023-52831 [MEDIUM] CVE-2023-52831: In the Linux kernel, the following vulnerability has been resolved: cpu/hotplug: Don't offline the last non-isolated CPU If a system has isolated CPUs
In the Linux kernel, the following vulnerability has been resolved: cpu/hotplug: Don't offline the last non-isolated CPU If a system has isolated CPUs via the "isolcpus=" command line parameter, then an attempt to offline the last housekeeping CPU will result in a WARN_ON() when rebuilding the scheduler domains and a subsequent panic due to and unhandled empty CPU mas in partition_sched_domains_locked(). cpuset_hotplug_workfn() rebuild_sched_domains_locked() ndoms = generate_sched_domains(&doms, &attr); cpumask_and(doms[0], top_cpuset.effective_cpus, housekeeping_cpumask(HK_FLAG_DOMAIN)); Thus results in an empty CPU mask which triggers the warning and then the subsequent crash: WARNING: CPU: 4 PID: 80 at kernel/sched/topology.c:2366 build_sched_domains+0x120c/0x1408 Call trace: build_sche
GHSA
GHSA-93cv-5m73-q9h8: In the Linux kernel, the following vulnerability has been resolved:
cpu/hotplug: Don't offline the last non-isolated CPU
If a system has isolated CP
ghsa_unreviewed·2024-05-21
CVE-2023-52831 [MEDIUM] CWE-617 GHSA-93cv-5m73-q9h8: In the Linux kernel, the following vulnerability has been resolved:
cpu/hotplug: Don't offline the last non-isolated CPU
If a system has isolated CP
In the Linux kernel, the following vulnerability has been resolved:
cpu/hotplug: Don't offline the last non-isolated CPU
If a system has isolated CPUs via the "isolcpus=" command line parameter,
then an attempt to offline the last housekeeping CPU will result in a
WARN_ON() when rebuilding the scheduler domains and a subsequent panic due
to and unhandled empty CPU mas in partition_sched_domains_locked().
cpuset_hotplug_workfn()
rebuild_sched_domains_locked()
ndoms = generate_sched_domains(&doms, &attr);
cpumask_and(doms[0], top_cpuset.effective_cpus, housekeeping_cpumask(HK_FLAG_DOMAIN));
Thus results in an empty CPU mask which triggers the warning and then the
subsequent crash:
WARNING: CPU: 4 PID: 80 at kernel/sched/topology.c:2366 build_sched_domains+0x120c/0x1408
Call trace:
build
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/3073f6df783d9d75f7f69f73e16c7ef85d6cfb63https://git.kernel.org/stable/c/335a47ed71e332c82339d1aec0c7f6caccfcda13https://git.kernel.org/stable/c/3410b702354702b500bde10e3cc1f9db8731d908https://git.kernel.org/stable/c/38685e2a0476127db766f81b1c06019ddc4c9ffahttps://git.kernel.org/stable/c/3073f6df783d9d75f7f69f73e16c7ef85d6cfb63https://git.kernel.org/stable/c/335a47ed71e332c82339d1aec0c7f6caccfcda13https://git.kernel.org/stable/c/3410b702354702b500bde10e3cc1f9db8731d908https://git.kernel.org/stable/c/38685e2a0476127db766f81b1c06019ddc4c9ffa
2024-05-21
Published