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NVD / CVE Program· CNA Linux

CVE-2024-49976: tracing/timerlat: Drop interface_lock in stop_kthread()

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 09cb44cc3d3df7ade2cebc939d6257a2fa8afc7a, 6.10.14, 6.6.55; Azure Linux 3.0 ARM 6.6.57.1-2; Azure Linux 3.0 x64 6.6.57.1-2.

Low priority for now. Upgrade to Linux Linux 09cb44cc3d3df7ade2cebc939d6257a2fa8afc7a, 6.10.14, 6.6.55; Azure Linux 3.0 ARM 6.6.57.1-2; Azure Linux 3.0 x64 6.6.57.1-2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: tracing/timerlat: Drop interface_lock in stop_kthread() stop_kthread() is the offline callback for "trace/osnoise:online", since commit 5bfbcd1ee57b ("tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()"), the following ABBA deadlock scenario is introduced: T1 | T2 [BP] | T3 [AP] osnoise_hotplug_workfn() | work_for_cpu_fn() | cpuhp_thread_fun() | _cpu_down() | osnoise_cpu_die() mutex_lock(&interface_lock) | | stop_kthread() | cpus_write_lock() | mutex_lock(&interface_lock) cpus_read_lock() | cpuhp_kick_ap() | As the interface_lock here in just for protecting the "kthread" field of the osn_var, use xchg() instead to fix this issue. Also use for_each_online_cpu() back in stop_per_cpu_kthreads() as it can take cpu_read_lock() again.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 21, 2024
Updated
Jun 17, 2026
EPSS
0.1% · 7th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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  • when it enters CISA KEV
  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel6.6.51 and later · before 6.6.55
  • linux linux kernel6.10.10 and later · before 6.10.14
  • linux linux kernel6.11 and later · before 6.11.3
  • linux linux kernel6.12

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.11affected
    • b4fdabffae14cca2c80d99bd81f3f27239ac7f5e and later · before a4a05ceffe8fad68b45de38fe2311bda619e76e2affected · git
    • 4679272d5252720746fd9c5465352cbc5665f230 and later · before 09cb44cc3d3df7ade2cebc939d6257a2fa8afc7aaffected · git
    • 5bfbcd1ee57b607fd29e4645c7f350dd385dd9ad and later · before db8571a9a098086608c11a15856ff585789e67e8affected · git
    • 5bfbcd1ee57b607fd29e4645c7f350dd385dd9ad and later · before b484a02c9cedf8703eff8f0756f94618004bd165affected · git
    • 6.6.51 and later · before 6.6.55affected · semver
    • 6.10.10 and later · before 6.10.14affected · semver
    • before 6.11not affected · semver
    • 6.6.55 and later · up to and including 6.6.*not affected · semver
    • 6.10.14 and later · up to and including 6.10.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.11.4-16.11.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-49974Oct 21, 2024 · NFSD: Limit the number of concurrent async COPY operations
    22Monitor
  • ← EarlierCVE-2024-49975Oct 21, 2024 · uprobes: fix kernel info leak via "[uprobes]" vma
    22Monitor
  • Later →CVE-2024-49978Oct 21, 2024 · gso: fix udp gso fraglist segmentation after pull from frag_list
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux09cb44cc3d3df7ade2cebc939d6257a2fa8afc7aVendor (CNA)
Linux Linux6.10.14Vendor (CNA)
Linux Linux6.6.55Vendor (CNA)
Linux Linuxa4a05ceffe8fad68b45de38fe2311bda619e76e2Vendor (CNA)
Linux Linuxb484a02c9cedf8703eff8f0756f94618004bd165Vendor (CNA)
Linux Linuxdb8571a9a098086608c11a15856ff585789e67e8Vendor (CNA)
Azure Linux 3.0 ARM6.6.57.1-2 · kernelMicrosoft (MSRC)
Azure Linux 3.0 x646.6.57.1-2 · kernelMicrosoft (MSRC)
debian:linux6.11.4-1 · Debian:13Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-667 · Improper Locking

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records