Review reviewHigh

CVE-2021-47242

Linux Linux, linux_kernel, linux kernel

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix soft lookup in subflow_error_report() Maxim reported a soft lookup in subflow_error_report(): watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:0] RIP: 0010:native_queued_spin_lock_slowpath RSP: 0018:ffffa859c0003bc0 EFLAGS: 00000202 RAX: 0000000000000101 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff9195c2772d88 RSI: 0000000000000000 RDI: ffff9195c2772d88 RBP: ffff9195c2772d00 R08: 00000000000067b0 R09: c6e31da9eb1e44f4 R10: ffff9195ef379700 R11: ffff9195edb50710 R12: ffff9195c2772d88 R13: ffff...

CVSS: 7.5
EPSS: 0.33%
CISA KEV: Not listed
Published: 2024.05.22

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.33%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: Linux Linux, linux_kernel, linux kernel
Affected versions: >= 15cc10453398c22f78f6c2b897119ecce5e5dd89 < 27ef25c72373222aaa5fe7b5cd890ae9cfb89a8d, >= 15cc10453398c22f78f6c2b897119ecce5e5dd89 < 499ada5073361c631f2a3c4a8aed44d53b6f82ec, >= c8ad65cb5051498b8a58be40499db9e930f0092e, >= 5.11.12 < 5.12, >= 5.12, >= 15cc10453398 < 27ef25c72373, >= 15cc10453398 < 499ada507336, >= 5.11.12 < 5.12.13, 5.13
Fixed versions: 5.12.13

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux Linux, linux_kernel, linux kernel and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-667