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Review reviewHigh

CVE-2023-53577

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: bpf, cpumap: Make sure kthread is running before map update returns The following warning was reported when running stress-mode enabled xdp_redirect_cpu with some RT threads: ------------[ cut here ]------------ WARNING: CPU: 4 PID: 65 at kernel/bpf/cpumap.c:135 CPU: 4 PID: 65 Comm: kworker/4:1 Not tainted 6.5.0-rc2+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Workqueue: events cpu_map_kthread_stop RIP: 0010:put_cpu_map_entry+0xda/0x220 ...... Call Trace: <TASK> ? show_regs+0x65/0x70 ? __warn+0xa5/0x240 .........

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.10.05
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: bpf, cpumap: Make sure kthread is running before map update returns The following warning was reported when running stress-mode enabled xdp_redirect_cpu with some RT threads: ------------[ cut here ]------------ WARNING: CPU: 4 PID: 65 at kernel/bpf/cpumap.c:135 CPU: 4 PID: 65 Comm: kworker/4:1 Not tainted 6.5.0-rc2+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Workqueue: events cpu_map_kthread_stop RIP: 0010:put_cpu_map_entry+0xda/0x220 ...... Call Trace: <TASK> ? show_regs+0x65/0x70 ? __warn+0xa5/0x240 .........

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 6710e1126934d8b4372b4d2f9ae1646cd3f151bf < b44d28b98f185d2f2348aa3c3636838c316f889e, >= 6710e1126934d8b4372b4d2f9ae1646cd3f151bf < 7a1178a3671b40746830d355836b72e47ceb2490, >= 6710e1126934d8b4372b4d2f9ae1646cd3f151bf < ecb45b852af5e88257020b88bea5ff0798d72aca, >= 6710e1126934d8b4372b4d2f9ae1646cd3f151bf < 640a604585aa30f93e39b17d4d6ba69fcb1e66c9, >= 4.15, >= 4.15 < 5.15.126, >= 5.16 < 6.1.45, >= 6.2 < 6.4.10, 6.5
Fixed versions
5.15.126, 6.1.45, 6.4.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-401