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NVD / CVE Program· CNA Linux

CVE-2022-49957: kcm: fix strp_init() order and cleanup

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: 0.26% (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 0946ff31d1a8778787bf6708beb20f38715267cc, 1b6666964ca1de93a7bf06e122bcf3616dbd33a9, 4.10.

Low priority for now. Upgrade to Linux Linux 0946ff31d1a8778787bf6708beb20f38715267cc, 1b6666964ca1de93a7bf06e122bcf3616dbd33a9, 4.10 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: kcm: fix strp_init() order and cleanup strp_init() is called just a few lines above this csk->sk_user_data check, it also initializes strp->work etc., therefore, it is unnecessary to call strp_done() to cancel the freshly initialized work. And if sk_user_data is already used by KCM, psock->strp should not be touched, particularly strp->work state, so we need to move strp_init() after the csk->sk_user_data check. This also makes a lockdep warning reported by syzbot go away.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 18, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 18th 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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When you'll hear from us

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  • 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 kernel4.9.84 and later · before 4.10
  • linux linux kernel4.9.100 and later · before 4.10
  • linux linux kernel4.14.22 and later · before 4.14.293
  • linux linux kernel4.14.41 and later · before 4.15
  • linux linux kernel4.15.1 and later · before 4.19.258
  • linux linux kernel4.20 and later · before 5.4.213
  • linux linux kernel5.5 and later · before 5.10.142
  • linux linux kernel5.11 and later · before 5.15.66
  • linux linux kernel5.16 and later · before 5.19.8
  • linux linux kernel4.15
  • linux linux kernel6.0

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

    • 085cbbda4b4cc7dd2ba63806346881c2c2e10107, 383250363daf01eb7aa3728c09ef8a4f6d8a3252, 19042316b9e12c93bf334a04d4dd7a4e846c7311, 4.15affected
    • 44890e9ff771ef11777b2d1ebf8589255eb12502 and later · before 473f394953216614087f4179e55cdf0cf616a13baffected · git
    • e5571240236c5652f3e079b1d5866716a7ad819c and later · before a8a0c321319ad64a5427d6172cd9c23b4d6ca1e8affected · git
    • e5571240236c5652f3e079b1d5866716a7ad819c and later · before 0946ff31d1a8778787bf6708beb20f38715267ccaffected · git
    • e5571240236c5652f3e079b1d5866716a7ad819c and later · before 1b6666964ca1de93a7bf06e122bcf3616dbd33a9affected · git
    • e5571240236c5652f3e079b1d5866716a7ad819c and later · before 55fb8c3baa8071c5d533a9ad48624e44e2a04ef5affected · git
    • e5571240236c5652f3e079b1d5866716a7ad819c and later · before f865976baa85915c7672f351b74d5974b93215f6affected · git
    • e5571240236c5652f3e079b1d5866716a7ad819c and later · before 8fc29ff3910f3af08a7c40a75d436b5720efe2bfaffected · git
    • 4.14.22 and later · before 4.14.293affected · semver
    • 4.9.84 and later · before 4.10affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.2-16.0.2-1

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-2022-49955Jun 18, 2025 · powerpc/rtas: Fix RTAS MSR[HV] handling for Cell
    22Monitor
  • ← EarlierCVE-2022-49956Jun 18, 2025 · staging: rtl8712: fix use after free bugs
    31Monitor
  • Later →CVE-2022-49958Jun 18, 2025 · net/sched: fix netdevice reference leaks in attach_default_qdiscs()
    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 Linux0946ff31d1a8778787bf6708beb20f38715267ccVendor (CNA)
Linux Linux1b6666964ca1de93a7bf06e122bcf3616dbd33a9Vendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.14.293Vendor (CNA)
Linux Linux473f394953216614087f4179e55cdf0cf616a13bVendor (CNA)
Linux Linux55fb8c3baa8071c5d533a9ad48624e44e2a04ef5Vendor (CNA)
Linux Linux8fc29ff3910f3af08a7c40a75d436b5720efe2bfVendor (CNA)
Linux Linuxa8a0c321319ad64a5427d6172cd9c23b4d6ca1e8Vendor (CNA)
Linux Linuxf865976baa85915c7672f351b74d5974b93215f6Vendor (CNA)
debian:linux6.0.2-1 · 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.

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.

  • CVE-2024-50302211 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2026-52989371 days apartnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
    39Monitor
  • CVE-2024-47685240 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2026-53225372 days apartsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
    36Monitor
  • CVE-2026-53170372 days apartaccel/ethosu: reject DMA commands with uninitialized length
    35Monitor
  • CVE-2026-43139322 days apartxfrm6: fix uninitialized saddr in xfrm6_get_saddr()
    34Monitor

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-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.

Change log

  1. Fix✗ → ✓

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

References

Show all references (6 more)

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

All records