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NVD / CVE Program· CNA Linux

CVE-2024-56665: bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog

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 5.16, 6.1.121, 6.12; azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 6.6.76.1-1; azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 6.6.76.1-1.

Low priority for now. Upgrade to Linux Linux 5.16, 6.1.121, 6.12; azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 6.6.76.1-1; azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 6.6.76.1-1 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: bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog Syzbot reported [1] crash that happens for following tracing scenario: - create tracepoint perf event with attr.inherit=1, attach it to the process and set bpf program to it - attached process forks -> chid creates inherited event the new child event shares the parent's bpf program and tp_event (hence prog_array) which is global for tracepoint - exit both process and its child -> release both events - first perf_event_detach_bpf_prog call will release tp_event->prog_array and second perf_event_detach_bpf_prog will crash, because tp_event->prog_array is NULL The fix makes sure the perf_event_detach_bpf_prog checks prog_array is valid before it tries to remove the bpf program from it. [1] https://lore.kernel.org/bpf/Z1MR6dCIKajNS6nU@krava/T/#m91dbf0688221ec7a7fc95e896a7ef9ff93b0b8ad

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Dec 27, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 12th percentile
CWE
—

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 kernel5.15.170 and later · before 5.16
  • linux linux kernel6.1.115 and later · before 6.1.121
  • linux linux kernel6.6.59 and later · before 6.6.67
  • linux linux kernel6.11.6 and later · before 6.12.6
  • linux linux kernel6.13

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

    • b4007d5fe38625b8a1b8edc0f385d86527651238, 585674b9d0d80bd7f428b1f88be13cf6d5d6f739, 6.12affected
    • 7a5c653ede645693422e43cccaa3e8f905d21c74 and later · before 842e5af282453983586e2eae3c8eaf252de5f22faffected · git
    • 21db2f35fa97e4a3447f2edeb7b2569a8bfdc83b and later · before c2b6b47662d5f2dfce92e5ffbdcac8229f321d9daffected · git
    • 0ee288e69d033850bc87abe0f9cc3ada24763d7f and later · before dfb15ddf3b65e0df2129f9756d1b4fa78055cdb3affected · git
    • 0ee288e69d033850bc87abe0f9cc3ada24763d7f and later · before 978c4486cca5c7b9253d3ab98a88c8e769cb9bbdaffected · git
    • 6.1.115 and later · before 6.1.121affected · semver
    • 6.6.59 and later · before 6.6.67affected · semver
    • 5.15.170 and later · before 5.16affected · semver
    • 6.11.6 and later · before 6.12affected · semver
    • before 6.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.123-16.1.123-1
Debian:13linuxbefore 6.12.6-16.12.6-1
SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6kernel-cocobefore 6.4.0-15061.15.coco15sp6.16.4.0-15061.15.coco15sp6.1
SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6kernel-coco_debugbefore 6.4.0-15061.15.coco15sp6.16.4.0-15061.15.coco15sp6.1
SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6kernel-source-cocobefore 6.4.0-15061.15.coco15sp6.16.4.0-15061.15.coco15sp6.1
SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6kernel-syms-cocobefore 6.4.0-15061.15.coco15sp6.16.4.0-15061.15.coco15sp6.1

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-2024-56662Dec 27, 2024 · acpi: nfit: vmalloc-out-of-bounds Read in acpi_nfit_ctl
    24Monitor
  • ← EarlierCVE-2024-56663Dec 27, 2024 · wifi: nl80211: fix NL80211_ATTR_MLO_LINK_ID off-by-one
    28Monitor
  • Later →CVE-2024-56666Dec 27, 2024 · drm/amdkfd: Dereference null return value
    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 Linux5.16Vendor (CNA)
Linux Linux6.1.121Vendor (CNA)
Linux Linux6.12Vendor (CNA)
Linux Linux6.6.67Vendor (CNA)
Linux Linux842e5af282453983586e2eae3c8eaf252de5f22fVendor (CNA)
Linux Linux978c4486cca5c7b9253d3ab98a88c8e769cb9bbdVendor (CNA)
Linux Linuxc2b6b47662d5f2dfce92e5ffbdcac8229f321d9dVendor (CNA)
Linux Linuxdfb15ddf3b65e0df2129f9756d1b4fa78055cdb3Vendor (CNA)
azl3 kernel 6.6.64.2-9 on Azure Linux 3.06.6.76.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.76.1-1 on Azure Linux 3.06.6.76.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.123-1 · Debian:12Package registry (OSV)
suse:kernel-coco6.4.0-15061.15.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6Package registry (OSV)
suse:kernel-coco_debug6.4.0-15061.15.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6Package registry (OSV)
suse:kernel-source-coco6.4.0-15061.15.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6Package registry (OSV)
suse:kernel-syms-coco6.4.0-15061.15.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6Package 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)

—

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 (4 more)

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

All records