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NVD / CVE Program· CNA Linux

CVE-2025-22062: sctp: add mutual exclusion in proc_sctp_do_udp_port()

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: 0.30% (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 10206302af856791fbcc27a33ed3c3eb09b2793d, 386507cb6fb7cdef598ddcb3f0fa37e6ca9e789d, 65ccb2793da7401772a3ffe85355c831b313c59f; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1; cbl2 kernel 5.15.182.1-1 on CBL Mariner 2.0 CBL-Mariner Releases.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 10206302af856791fbcc27a33ed3c3eb09b2793d, 386507cb6fb7cdef598ddcb3f0fa37e6ca9e789d, 65ccb2793da7401772a3ffe85355c831b313c59f; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1; cbl2 kernel 5.15.182.1-1 on CBL Mariner 2.0 CBL-Mariner Releases 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: sctp: add mutual exclusion in proc_sctp_do_udp_port() We must serialize calls to sctp_udp_sock_stop() and sctp_udp_sock_start() or risk a crash as syzbot reported: Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 1 UID: 0 PID: 6551 Comm: syz.1.44 Not tainted 6.14.0-syzkaller-g7f2ff7b62617 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3653 Call Trace: <TASK> udp_tunnel_sock_release+0x68/0x80 net/ipv4/udp_tunnel_core.c:181 sctp_udp_sock_stop+0x71/0x160 net/sctp/protocol.c:930 proc_sctp_do_udp_port+0x264/0x450 net/sctp/sysctl.c:553 proc_sys_call_handler+0x3d0/0x5b0 fs/proc/proc_sysctl.c:601 iter_file_splice_write+0x91c/0x1150 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0x18f/0x6c0 fs/splice.c:1158 splice_direct_to_actor+0x342/0xa30 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x174/0x240 fs/splice.c:1227 do_sendfile+0xafd/0xe50 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1429 [inline] __se_sys_sendfile64 fs/read_write.c:1415 [inline] __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1415 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]

Published
Apr 16, 2025
Updated
Oct 15, 2026
EPSS
0.3% · 23th 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 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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.

Follow CVE-2025-22062

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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

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

    • 5.11affected
    • 046c052b475e7119b6a30e3483e2888fc606a2f8 and later · before 65ccb2793da7401772a3ffe85355c831b313c59faffected · git
    • 046c052b475e7119b6a30e3483e2888fc606a2f8 and later · before 386507cb6fb7cdef598ddcb3f0fa37e6ca9e789daffected · git
    • 046c052b475e7119b6a30e3483e2888fc606a2f8 and later · before b3598f53211ba1025485306de2733bdd241311a3affected · git
    • 046c052b475e7119b6a30e3483e2888fc606a2f8 and later · before e5178bfc55b3a78000f0f8298e7ade88783ce581affected · git
    • 046c052b475e7119b6a30e3483e2888fc606a2f8 and later · before efb8cb487be8f4ba6aaef616011d702d6a083ed1affected · git
    • 046c052b475e7119b6a30e3483e2888fc606a2f8 and later · before d3d7675d77622f6ca1aae14c51f80027b36283f8affected · git
    • 046c052b475e7119b6a30e3483e2888fc606a2f8 and later · before 10206302af856791fbcc27a33ed3c3eb09b2793daffected · git
    • before 5.11not affected · semver
    • 5.15.184 and later · up to and including 5.15.*not affected · semver

Affected versions

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

  • linux linux kernel5.11 and later · before 6.12.23
  • linux linux kernel6.13 and later · before 6.13.11
  • linux linux kernel6.14 and later · before 6.14.2

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:11linux-6.1before 6.1.140-1~deb11u16.1.140-1~deb11u1
Debian:12linuxbefore 6.1.140-16.1.140-1
Debian:13linuxbefore 6.12.25-16.12.25-1

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-2025-22057Apr 16, 2025 · net: decrease cached dst counters in dst_release
    22Monitor
  • ← EarlierCVE-2025-22060Apr 16, 2025 · net: mvpp2: Prevent parser TCAM memory corruption
    18Monitor
  • Later →CVE-2025-22070Apr 16, 2025 · fs/9p: fix NULL pointer dereference on mkdir
    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 Linux10206302af856791fbcc27a33ed3c3eb09b2793dVendor (CNA)
Linux Linux386507cb6fb7cdef598ddcb3f0fa37e6ca9e789dVendor (CNA)
Linux Linux65ccb2793da7401772a3ffe85355c831b313c59fVendor (CNA)
Linux Linuxb3598f53211ba1025485306de2733bdd241311a3Vendor (CNA)
Linux Linuxd3d7675d77622f6ca1aae14c51f80027b36283f8Vendor (CNA)
Linux Linuxe5178bfc55b3a78000f0f8298e7ade88783ce581Vendor (CNA)
Linux Linuxefb8cb487be8f4ba6aaef616011d702d6a083ed1Vendor (CNA)
azl3 kernel 6.6.92.2-1 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.182.1-1 on CBL Mariner 2.0CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.182.1-1 on CBL-Mariner 2.05.15.184.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.140-1 · Debian:12Package registry (OSV)
debian:linux-6.16.1.140-1~deb11u1 · Debian:11Package 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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · 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-476 · NULL Pointer Dereference

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 (7 more)

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

All records