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NVD / CVE Program· CNA Linux

CVE-2022-49675: tick/nohz: unexport __init-annotated tick_nohz_full_setup()

MediumCVSS 5.5 · v3.1—No exploit Fix available

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: 0.28% (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 2390095113e98fc52fffe35c5206d30d9efe3f78, c4ff3ffe0138234774602152fe67e3a898c615c6, ea32b27e2f8c58c92bff5ecba7fcf64b97707089.

Low priority for now. Upgrade to Linux Linux 2390095113e98fc52fffe35c5206d30d9efe3f78, c4ff3ffe0138234774602152fe67e3a898c615c6, ea32b27e2f8c58c92bff5ecba7fcf64b97707089 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: tick/nohz: unexport __init-annotated tick_nohz_full_setup() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it had been broken for a decade. Commit 28438794aba4 ("modpost: fix section mismatch check for exported init/exit sections") fixed it so modpost started to warn it again, then this showed up: MODPOST vmlinux.symvers WARNING: modpost: vmlinux.o(___ksymtab_gpl+tick_nohz_full_setup+0x0): Section mismatch in reference from the variable __ksymtab_tick_nohz_full_setup to the function .init.text:tick_nohz_full_setup() The symbol tick_nohz_full_setup is exported and annotated __init Fix this by removing the __init annotation of tick_nohz_full_setup or drop the export. Drop the export because tick_nohz_full_setup() is only called from the built-in code in kernel/sched/isolation.c.

Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 20th 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%

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  • 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

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

    • 5.5affected
    • ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 and later · before c4ff3ffe0138234774602152fe67e3a898c615c6affected · git
    • ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 and later · before f4a80ec8c51d68be4b7a7830c510f75080c5e417affected · git
    • ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 and later · before ea32b27e2f8c58c92bff5ecba7fcf64b97707089affected · git
    • ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 and later · before 2390095113e98fc52fffe35c5206d30d9efe3f78affected · git
    • before 5.5not affected · semver
    • 5.10.128 and later · up to and including 5.10.*not affected · semver
    • 5.15.52 and later · up to and including 5.15.*not affected · semver
    • 5.18.9 and later · up to and including 5.18.*not affected · semver
    • 5.19 and laternot affected · original_commit_for_fix
Affected versions · NVD (4)

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

  • linux linux kernel5.5 and later · before 5.10.128
  • linux linux kernel5.11 and later · before 5.15.52
  • linux linux kernel5.16 and later · before 5.18.9
  • linux linux kernel5.19

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.14-15.18.14-1

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-2022-49673Feb 26, 2025 · dm raid: fix KASAN warning in raid5_add_disks
    22Monitor
  • ← EarlierCVE-2022-49674Feb 26, 2025 · dm raid: fix accesses beyond end of raid member array
    28Monitor
  • Later →CVE-2022-49676Feb 26, 2025 · memory: samsung: exynos5422-dmc: Fix refcount leak in of_get_dram_timings
    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 Linux2390095113e98fc52fffe35c5206d30d9efe3f78Vendor (CNA)
Linux Linuxc4ff3ffe0138234774602152fe67e3a898c615c6Vendor (CNA)
Linux Linuxea32b27e2f8c58c92bff5ecba7fcf64b97707089Vendor (CNA)
Linux Linuxf4a80ec8c51d68be4b7a7830c510f75080c5e417Vendor (CNA)
debian:linux5.18.14-1 · Debian:12Package 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.

Variant candidates

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

  • CVE-2024-5030299 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2026-52989483 days apartnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
    39Monitor
  • CVE-2026-63857508 days apartnet: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()
    39Monitor
  • CVE-2024-47685128 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2026-53225484 days apartsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
    36Monitor
  • CVE-2026-53170484 days apartaccel/ethosu: reject DMA commands with uninitialized length
    35Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

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-908 · Use of Uninitialized Resource

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.

References

Show all references (3 more)

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

All records