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CVE-2024-43869· NVD / CVE Program· CNA Linux

perf: Fix event leak upon exec and file release

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: 0.21% (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 104e258a004037bc7dba9f6085c71dad6af57ad4, 3a5465418f5fd970e86a86c7f4075be262682840, 5.15.165.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 104e258a004037bc7dba9f6085c71dad6af57ad4, 3a5465418f5fd970e86a86c7f4075be262682840, 5.15.165 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: perf: Fix event leak upon exec and file release The perf pending task work is never waited upon the matching event release. In the case of a child event, released via free_event() directly, this can potentially result in a leaked event, such as in the following scenario that doesn't even require a weak IRQ work implementation to trigger: schedule() prepare_task_switch() =======> <NMI> perf_event_overflow() event->pending_sigtrap = ... irq_work_queue(&event->pending_irq) <======= </NMI> perf_event_task_sched_out() event_sched_out() event->pending_sigtrap = 0; atomic_long_inc_not_zero(&event->refcount) task_work_add(&event->pending_task) finish_lock_switch() =======> <IRQ> perf_pending_irq() //do nothing, rely on pending task work <======= </IRQ> begin_new_exec() perf_event_exit_task() perf_event_exit_event() // If is child event free_event() WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1) // event is leaked Similar scenarios can also happen with perf_event_remove_on_exec() or simply against concurrent perf_event_release(). Fix this with synchonizing against the possibly remaining pending task work while freeing the event, just like is done with remaining pending IRQ work. This means that the pending task callback neither need nor should hold a reference to the event, preventing it from ever beeing freed.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 20, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 10th 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 · 0.2%

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

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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 kernel5.15.84 and later · before 5.15.165
  • linux linux kernel6.0.14 and later · before 6.1
  • linux linux kernel6.1.1 and later · before 6.1.103
  • linux linux kernel6.2 and later · before 6.6.44
  • linux linux kernel6.7 and later · before 6.10.3
  • linux linux kernel6.1

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

    • 78e1317a174edbfd1182599bf76c092a2877672c, 6.1affected
    • 8bffa95ac19ff27c8261904f89d36c7fcf215d59 and later · before 9ad46f1fef421d43cdab3a7d1744b2f43b54dae0affected · git
    • 517e6a301f34613bff24a8e35b5455884f2d83d8 and later · before ed2c202dac55423a52d7e2290f2888bf08b8ee99affected · git
    • 517e6a301f34613bff24a8e35b5455884f2d83d8 and later · before 104e258a004037bc7dba9f6085c71dad6af57ad4affected · git
    • 517e6a301f34613bff24a8e35b5455884f2d83d8 and later · before f34d8307a73a18de5320fcc6f40403146d061891affected · git
    • 517e6a301f34613bff24a8e35b5455884f2d83d8 and later · before 3a5465418f5fd970e86a86c7f4075be262682840affected · git
    • 5.15.84 and later · before 5.15.165affected · semver
    • 6.0.14 and later · before 6.1affected · semver
    • before 6.1not affected · semver
    • 5.15.165 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.106-16.1.106-1
Debian:13linuxbefore 6.10.3-16.10.3-1
openSUSE:Leap 15.6dtb-aarch64before 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-64kbbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-azurebefore 6.4.0-150600.8.40.16.4.0-150600.8.40.1
openSUSE:Leap 15.6kernel-debugbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-defaultbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-default-basebefore 6.4.0-150600.23.53.1.150600.12.24.16.4.0-150600.23.53.1.150600.12.24.1
openSUSE:Leap 15.6kernel-docsbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-kvmsmallbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-obs-buildbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-obs-qabefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-rtbefore 6.4.0-150600.10.39.16.4.0-150600.10.39.1
openSUSE:Leap 15.6kernel-rt_debugbefore 6.4.0-150600.10.39.16.4.0-150600.10.39.1
openSUSE:Leap 15.6kernel-sourcebefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-source-azurebefore 6.4.0-150600.8.40.16.4.0-150600.8.40.1
openSUSE:Leap 15.6kernel-source-rtbefore 6.4.0-150600.10.39.16.4.0-150600.10.39.1
openSUSE:Leap 15.6kernel-symsbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-syms-azurebefore 6.4.0-150600.8.40.16.4.0-150600.8.40.1
openSUSE:Leap 15.6kernel-syms-rtbefore 6.4.0-150600.10.39.16.4.0-150600.10.39.1
openSUSE:Leap 15.6kernel-zfcpdumpbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_12before 1-150600.13.3.11-150600.13.3.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6-RT_Update_11before 1-150600.1.3.21-150600.1.3.2
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_2before 1-150700.15.3.11-150700.15.3.1

+44

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-43867Aug 20, 2024 · drm/nouveau: prime: fix refcount underflow
    22Monitor
  • ← EarlierCVE-2024-43868Aug 20, 2024 · riscv/purgatory: align riscv_kernel_entry
    22Monitor
  • Later →CVE-2024-43870Aug 20, 2024 · perf: Fix event leak upon exit
    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 Linux104e258a004037bc7dba9f6085c71dad6af57ad4Vendor (CNA)
Linux Linux3a5465418f5fd970e86a86c7f4075be262682840Vendor (CNA)
Linux Linux5.15.165Vendor (CNA)
Linux Linux6.1Vendor (CNA)
Linux Linux9ad46f1fef421d43cdab3a7d1744b2f43b54dae0Vendor (CNA)
Linux Linuxed2c202dac55423a52d7e2290f2888bf08b8ee99Vendor (CNA)
Linux Linuxf34d8307a73a18de5320fcc6f40403146d061891Vendor (CNA)
debian:linux6.1.106-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-azure6.4.0-150600.8.40.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.53.1.150600.12.24.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-rt6.4.0-150600.10.39.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-rt_debug6.4.0-150600.10.39.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source-azure6.4.0-150600.8.40.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source-rt6.4.0-150600.10.39.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms-azure6.4.0-150600.8.40.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms-rt6.4.0-150600.10.39.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:kernel-azure6.4.0-150600.8.40.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)
suse:kernel-coco6.4.0-15061.21.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6Package registry (OSV)
suse:kernel-coco_debug6.4.0-15061.21.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6-RT_Update_111-150600.1.3.2 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-rt6.4.0-150600.10.39.1 · SUSE:Real Time Module 15 SP6Package registry (OSV)
suse:kernel-rt_debug6.4.0-150600.10.39.1 · SUSE:Real Time Module 15 SP6Package registry (OSV)
suse:kernel-source-azure6.4.0-150600.8.40.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)
suse:kernel-source-coco6.4.0-15061.21.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6Package registry (OSV)
suse:kernel-source-rt6.4.0-150600.10.39.1 · SUSE:Real Time Module 15 SP6Package registry (OSV)
suse:kernel-syms-azure6.4.0-150600.8.40.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)

+2

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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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-401 · Missing Release of Memory after Effective Lifetime

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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (5 more)

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

All records