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Fencer Vulns
high 7.8

CVE-2025-38459 json

atm: clip: Fix infinite recursive call of clip_push().

published 2025-07-25 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-22682

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

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:

Patch / fix

  • Linux Linux 5.4.296, 5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7, 6.16
  • linux Debian 12 6.1.147-1
  • linux Debian 13 6.12.41-1
  • linux Debian 14 6.16.3-1

debian advisories DEBIAN-CVE-2025-38459

  • linux Ubuntu 22.04 LTS 5.15.0-156.166
  • linux Ubuntu 24.04 LTS 6.8.0-100.100
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1092.99
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1046.49
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1092.101
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1047.50
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1089.95
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1043.48

ubuntu advisories UBUNTU-CVE-2025-38459

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-611.30.1.el9_7
  • rv RHEL 9 5.14.0-611.30.1.el9_7
  • perf RHEL 9 5.14.0-611.30.1.el9_7
  • rtla RHEL 9 5.14.0-611.30.1.el9_7
  • libperf RHEL 9 5.14.0-611.30.1.el9_7
  • kernel-rt RHEL 9 5.14.0-611.30.1.el9_7
  • kernel-64k RHEL 9 5.14.0-611.30.1.el9_7
  • kernel-core RHEL 9 5.14.0-611.30.1.el9_7

red hat advisories RHSA-2026:3685RHSA-2026:3634RHSA-2026:3388RHSA-2026:3360RHSA-2026:3277RHSA-2026:3268

  • kernel-rt Linux Micro 6.2 6.12.0-160000.6.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.6.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1.160000.2.4
  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-obs-qa SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.6.1
  • kernel-kvmsmall SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.6.1

suse advisories SUSE-SU-2025:21074-1SUSE-SU-2025:21139-1SUSE-SU-2026:20560-1SUSE-SU-2025:21179-1SUSE-SU-2025:03634-1SUSE-SU-2025:03633-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.6.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-kvmsmall openSUSE Leap 16.0 6.12.0-160000.6.1

opensuse advisories openSUSE-SU-2025:20081-1

  • kernel AlmaLinux 9 5.14.0-611.30.1.el9_7
  • rv AlmaLinux 9 5.14.0-611.30.1.el9_7
  • perf AlmaLinux 9 5.14.0-611.30.1.el9_7
  • rtla AlmaLinux 9 5.14.0-611.30.1.el9_7
  • libperf AlmaLinux 9 5.14.0-611.30.1.el9_7
  • kernel-rt AlmaLinux 9 5.14.0-611.30.1.el9_7
  • kernel-64k AlmaLinux 9 5.14.0-611.30.1.el9_7
  • kernel-core AlmaLinux 9 5.14.0-611.30.1.el9_7

almalinux advisories ALSA-2026:2212ALSA-2026:1661ALSA-2026:1662

  • kernel Rocky Linux 9 5.14.0-611.30.1.el9_7
  • kernel-rt Rocky Linux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel Rocky Linux 8 4.18.0-553.100.1.el8_10

rocky linux advisories RLSA-2026:2212RLSA-2026:1661RLSA-2026:1662

  • kernel Azure Linux 3.0 6.6.104.2-1
  • kernel CBL-Mariner 2.0 5.15.200.1-1

azure linux advisories AZL-65822AZL-72941

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-38459 updated cvss 7.0

kernel: Linux kernel: Denial of Service in ATM CLIP module via infinite recursion

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.30.1.el9_7, perf 5.14.0-611.30.1.el9_7, rtla 5.14.0-611.30.1.el9_7, python3-perf 5.14.0-611.30.1.el9_7, kernel-devel-matched 5.14.0-611.30.1.el9_7, kernel-64k-devel-matched 5.14.0-611.30.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.100.1.el8_10, kernel 4.18.0-553.100.1.el8_10, bpftool 4.18.0-553.100.1.el8_10, kernel-core 4.18.0-553.100.1.el8_10, kernel-tools 4.18.0-553.100.1.el8_10, python3-perf 4.18.0-553.100.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:1662
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.30.1.el9_7, kernel-64k 5.14.0-611.30.1.el9_7, kernel-core 5.14.0-611.30.1.el9_7, kernel-tools 5.14.0-611.30.1.el9_7, kernel-modules 5.14.0-611.30.1.el9_7, kernel-64k-core 5.14.0-611.30.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.187.1.el8_2, kernel 4.18.0-193.187.1.el8_2, bpftool 4.18.0-193.187.1.el8_2, kernel-core 4.18.0-193.187.1.el8_2, kernel-tools 4.18.0-193.187.1.el8_2, python3-perf 4.18.0-193.187.1.el8_2, +8 more
    fixed: vendor fix RHSA-2026:3388
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.186.1.el8_4, kernel 4.18.0-305.186.1.el8_4, bpftool 4.18.0-305.186.1.el8_4, kernel-core 4.18.0-305.186.1.el8_4, kernel-tools 4.18.0-305.186.1.el8_4, python3-perf 4.18.0-305.186.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:3360
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.181.1.el8_6, kernel 4.18.0-372.181.1.el8_6, bpftool 4.18.0-372.181.1.el8_6, kernel-core 4.18.0-372.181.1.el8_6, kernel-tools 4.18.0-372.181.1.el8_6, python3-perf 4.18.0-372.181.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.181.1.el8_6, kernel 4.18.0-372.181.1.el8_6, bpftool 4.18.0-372.181.1.el8_6, kernel-core 4.18.0-372.181.1.el8_6, kernel-tools 4.18.0-372.181.1.el8_6, python3-perf 4.18.0-372.181.1.el8_6, +15 more
    fixed: vendor fix RHSA-2026:3268
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.130.1.el8_8, kernel 4.18.0-477.130.1.el8_8, bpftool 4.18.0-477.130.1.el8_8, kernel-core 4.18.0-477.130.1.el8_8, kernel-tools 4.18.0-477.130.1.el8_8, python3-perf 4.18.0-477.130.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:3277
show 11 more
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.186.1.el8_4, kernel 4.18.0-305.186.1.el8_4, bpftool 4.18.0-305.186.1.el8_4, kernel-core 4.18.0-305.186.1.el8_4, kernel-tools 4.18.0-305.186.1.el8_4, python3-perf 4.18.0-305.186.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:3360
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.181.1.el8_6, kernel 4.18.0-372.181.1.el8_6, bpftool 4.18.0-372.181.1.el8_6, kernel-core 4.18.0-372.181.1.el8_6, kernel-tools 4.18.0-372.181.1.el8_6, python3-perf 4.18.0-372.181.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:3268
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.130.1.el8_8, kernel 4.18.0-477.130.1.el8_8, bpftool 4.18.0-477.130.1.el8_8, kernel-core 4.18.0-477.130.1.el8_8, kernel-tools 4.18.0-477.130.1.el8_8, python3-perf 4.18.0-477.130.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:3277
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.30.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.30.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.30.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.30.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.30.1.el9_7
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.100.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.100.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.100.1.el8_10
    fixed: vendor fix RHSA-2026:1662
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.147.1.rt56.1299.el7, kernel-rt-trace 3.10.0-1160.147.1.rt56.1299.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.147.1.rt56.1299.el7
    fixed: vendor fix RHSA-2026:3634
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-kvm 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-core 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-modules 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-debug-kvm 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-debug-core 4.18.0-553.100.1.rt7.441.el8_10, +4 more
    fixed: vendor fix RHSA-2026:1661
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.30.1.el9_7, kernel-rt-64k 5.14.0-611.30.1.el9_7, kernel-rt-core 5.14.0-611.30.1.el9_7, kernel-rt-modules 5.14.0-611.30.1.el9_7, kernel-rt-64k-core 5.14.0-611.30.1.el9_7, kernel-rt-debug-core 5.14.0-611.30.1.el9_7, +14 more Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.30.1.el9_7, kernel-rt-core 5.14.0-611.30.1.el9_7, kernel-rt-modules 5.14.0-611.30.1.el9_7, kernel-rt-debug-core 5.14.0-611.30.1.el9_7, kernel-rt-modules-core 5.14.0-611.30.1.el9_7, kernel-rt-debug-modules 5.14.0-611.30.1.el9_7, +4 more
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-core 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-modules 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-debug-core 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-debug-modules 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-modules-extra 4.18.0-553.100.1.rt7.441.el8_10, +2 more
    fixed: vendor fix RHSA-2026:1661
  • Red Hat Enterprise Linux Server (v. 7 ELS) perf 3.10.0-1160.147.1.el7, kernel 3.10.0-1160.147.1.el7, bpftool 3.10.0-1160.147.1.el7, python-perf 3.10.0-1160.147.1.el7, kernel-kdump 3.10.0-1160.147.1.el7, kernel-tools 3.10.0-1160.147.1.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debuginfo-common-ppc64 3.10.0-1160.147.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.147.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.147.1.el7
    fixed: vendor fix RHSA-2026:3685
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 10 kernel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.