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NVD / CVE Program· CNA Linux

CVE-2025-38459: atm: clip: Fix infinite recursive call of clip_push().

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.20% (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 024876b247a882972095b22087734dcd23396a4e, 125166347d5676466d368aadc0bbc31ee7714352, 1579a2777cb914a249de22c789ba4d41b154509f; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.

Low priority for now. Upgrade to Linux Linux 024876b247a882972095b22087734dcd23396a4e, 125166347d5676466d368aadc0bbc31ee7714352, 1579a2777cb914a249de22c789ba4d41b154509f; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 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: atm: clip: Fix infinite recursive call of clip_push(). syzbot reported the splat below. [0] This happens if we call ioctl(ATMARP_MKIP) more than once. During the first call, clip_mkip() sets clip_push() to vcc->push(), and the second call copies it to clip_vcc->old_push(). Later, when the socket is close()d, vcc_destroy_socket() passes NULL skb to clip_push(), which calls clip_vcc->old_push(), triggering the infinite recursion. Let's prevent the second ioctl(ATMARP_MKIP) by checking vcc->user_back, which is allocated by the first call as clip_vcc. Note also that we use lock_sock() to prevent racy calls. [0]: BUG: TASK stack guard page was hit at ffffc9000d66fff8 (stack is ffffc9000d670000..ffffc9000d678000) Oops: stack guard page: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted 6.16.0-rc4-syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:clip_push+0x5/0x720 net/atm/clip.c:191 Code: e0 8f aa 8c e8 1c ad 5b fa eb ae 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 f3 49 89 fd 48 bd 00 RSP: 0018:ffffc9000d670000 EFLAGS: 00010246 RAX: 1ffff1100235a4a5 RBX: ffff888011ad2508 RCX: ffff8880003c0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888037f01000 RBP: dffffc0000000000 R08: ffffffff8fa104f7 R09: 1ffffffff1f4209e R10: dffffc0000000000 R11: ffffffff8a99b300 R12: ffffffff8a99b300 R13: ffff888037f01000 R14: ffff888011ad2500 R15: ffff888037f01578 FS: 000055557ab6d500(0000) GS:ffff88808d250000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000d66fff8 CR3: 0000000043172000 CR4: 0000000000352ef0 Call Trace: <TASK> clip_push+0x6dc/0x720 net/atm/clip.c:200 clip_push+0x6dc/0x720 net/atm/clip.c:200 clip_push+0x6dc/0x720 net/atm/clip.c:200 ... clip_push+0x6dc/0x720 net/atm/clip.c:200 clip_push+0x6dc/0x720 net/atm/clip.c:200 clip_push+0x6dc/0x720 net/atm/clip.c:200 vcc_destroy_socket net/atm/common.c:183 [inline] vcc_release+0x157/0x460 net/atm/common.c:205 __sock_release net/socket.c:647 [inline] sock_close+0xc0/0x240 net/socket.c:1391 __fput+0x449/0xa70 fs/file_table.c:465 task_work_run+0x1d1/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff31c98e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffb5aa1f78 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 0000000000012747 RCX: 00007ff31c98e929 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007ff31cbb7ba0 R08: 0000000000000001 R09: 0000000db5aa226f R10: 00007ff31c7ff030 R11: 0000000000000246 R12: 00007ff31cbb608c R13: 00007ff31cbb6080 R14: ffffffffffffffff R15: 00007fffb5aa2090 </TASK> Modules linked in:

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jul 25, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

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
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel5.5 and later · before 5.10.240
  • linux linux kernel5.11 and later · before 5.15.189
  • linux linux kernel5.16 and later · before 6.1.146
  • linux linux kernel6.2 and later · before 6.6.99
  • linux linux kernel2.6.13 and later · before 5.4.296
  • linux linux kernel6.13 and later · before 6.15.7
  • linux linux kernel6.7 and later · before 6.12.39
  • linux linux kernel2.6.12
  • linux linux kernel6.16

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f493f31a63847624fd3199ac836a8bd8828e50e2affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 125166347d5676466d368aadc0bbc31ee7714352affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 5641019dfbaee5e85fe093b590f0451c9dd4d6f8affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 1579a2777cb914a249de22c789ba4d41b154509faffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 3f61b997fe014bbfcc208a9fcbd363a1fe7e3a31affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 024876b247a882972095b22087734dcd23396a4eaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before df0312d8859763aa15b8b56ac151a1ea4a4e5b88affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c489f3283dbfc0f3c00c312149cae90d27552c45affected · git
    • before 2.6.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.100.1.el8_104.18.0-553.100.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.100.1.rt7.441.el8_104.18.0-553.100.1.rt7.441.el8_10

+96

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-2025-38457Jul 25, 2025 · net/sched: Abort __tc_modify_qdisc if parent class does not exist
    22Monitor
  • ← EarlierCVE-2025-38458Jul 25, 2025 · atm: clip: Fix NULL pointer dereference in vcc_sendmsg()
    22Monitor
  • Later →CVE-2025-38461Jul 25, 2025 · vsock: Fix transport_* TOCTOU
    18Monitor

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 Linux024876b247a882972095b22087734dcd23396a4eVendor (CNA)
Linux Linux125166347d5676466d368aadc0bbc31ee7714352Vendor (CNA)
Linux Linux1579a2777cb914a249de22c789ba4d41b154509fVendor (CNA)
Linux Linux3f61b997fe014bbfcc208a9fcbd363a1fe7e3a31Vendor (CNA)
Linux Linux5641019dfbaee5e85fe093b590f0451c9dd4d6f8Vendor (CNA)
Linux Linuxc489f3283dbfc0f3c00c312149cae90d27552c45Vendor (CNA)
Linux Linuxdf0312d8859763aa15b8b56ac151a1ea4a4e5b88Vendor (CNA)
Linux Linuxf493f31a63847624fd3199ac836a8bd8828e50e2Vendor (CNA)
azl3 kernel 6.6.96.2-2 on Azure Linux 3.06.6.104.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:bpftool4.18.0-553.100.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.100.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-core4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-core4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-devel4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-devel4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules-extra4.18.0-553.100.1.rt7.441.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.147-1 · Debian:12Package registry (OSV)
red hat:kernel-rt0:4.18.0-553.100.1.rt7.441.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-core0:4.18.0-553.100.1.rt7.441.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-core0:4.18.0-553.100.1.rt7.441.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-debuginfo0:4.18.0-553.100.1.rt7.441.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-devel0:4.18.0-553.100.1.rt7.441.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-kvm0:4.18.0-553.100.1.rt7.441.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules0:4.18.0-553.100.1.rt7.441.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)

+7

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-2026-43185285 days apartksmbd: fix signededness bug in smb_direct_prepare_negotiation()
    39Monitor
  • CVE-2026-53202335 days apartaccel/ivpu: Fix signed integer truncation in IPC receive
    31Monitor
  • CVE-2026-53267335 days apartnetfilter: nft_ct: bail out on template ct in get eval
    31Monitor
  • CVE-2024-35886432 days apartipv6: Fix infinite recursion in fib6_dump_done().
    31Monitor
  • CVE-2026-53395359 days apartnfsd: fix dead ACL conflict guard in nfsd4_create
    30Monitor
  • CVE-2026-46149307 days apartscsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()
    28Monitor

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
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-674 · Uncontrolled Recursion

CVSS vector

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (9 more)

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

All records