high 7.1

CVE-2025-22055 json

net: fix geneve_opt length integer overflow

published 2025-04-16 18 mo ago modified 2026-10-15 25 d ago also EUVD-2025-11240

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

In the Linux kernel, the following vulnerability has been resolved:

struct geneve_opt uses 5 bit length for each single option, which means every vary size option should be smaller than 128 bytes.

However, all current related Netlink policies cannot promise this length condition and the attacker can exploit a exact 128-byte size option to *fake* a zero length option and confuse the parsing logic, further achieve heap out-of-bounds read.

One example crash log is like below:

[ 3.905425] ================================================================== [ 3.905925] BUG: KASAN: slab-out-of-bounds in nla_put+0xa9/0xe0 [ 3.906255] Read of size 124 at addr ffff888005f291cc by task poc/177 [ 3.906646] [ 3.906775] CPU: 0 PID: 177 Comm: poc-oob-read Not tainted 6.1.132 #1 [ 3.907131] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 [ 3.907784] Call Trace: [ 3.907925] <TASK> [ 3.908048] dump_stack_lvl+0x44/0x5c [ 3.908258] print_report+0x184/0x4be [ 3.909151] kasan_report+0xc5/0x100 [ 3.909539] kasan_check_range+0xf3/0x1a0 [ 3.909794] memcpy+0x1f/0x60 [ 3.909968] nla_put+0xa9/0xe0 [ 3.910147] tunnel_key_dump+0x945/0xba0 [ 3.911536] tcf_action_dump_1+0x1c1/0x340 [ 3.912436] tcf_action_dump+0x101/0x180 [ 3.912689] tcf_exts_dump+0x164/0x1e0 [ 3.912905] fw_dump+0x18b/0x2d0 [ 3.913483] tcf_fill_node+0x2ee/0x460 [ 3.914778] tfilter_notify+0xf4/0x180 [ 3.915208] tc_new_tfilter+0xd51/0x10d0 [ 3.918615] rtnetlink_rcv_msg+0x4a2/0x560 [ 3.919118] netlink_rcv_skb+0xcd/0x200 [ 3.919787] netlink_unicast+0x395/0x530 [ 3.921032] netlink_sendmsg+0x3d0/0x6d0 [ 3.921987] __sock_sendmsg+0x99/0xa0 [ 3.922220] __sys_sendto+0x1b7/0x240 [ 3.922682] __x64_sys_sendto+0x72/0x90 [ 3.922906] do_syscall_64+0x5e/0x90 [ 3.923814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 3.924122] RIP: 0033:0x7e83eab84407 [ 3.924331] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 faf [ 3.925330] RSP: 002b:00007ffff505e370 EFLAGS: 00000202 ORIG_RAX: 000000000000002c [ 3.925752] RAX: ffffffffffffffda RBX: 00007e83eaafa740 RCX: 00007e83eab84407 [ 3.926173] RDX: 00000000000001a8 RSI: 00007ffff505e3c0 RDI: 0000000000000003 [ 3.926587] RBP: 00007ffff505f460 R08: 00007e83eace1000 R09: 000000000000000c [ 3.926977] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffff505f3c0 [ 3.927367] R13: 00007ffff505f5c8 R14: 00007e83ead1b000 R15: 00005d4fbbe6dcb8

Fix these issues by enforing correct length condition in related policies.

Patch / fix

fixed in 1 distros 6 links 8

Linux Linux 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15

debian ubuntu red hat suse almalinux rocky linux

linux Debian 12 6.1.135-1
linux Debian 14, Debian 13 6.12.25-1

debian advisories DEBIAN-CVE-2025-22055

linux Ubuntu 22.04 LTS 5.15.0-142.152
linux Ubuntu 24.04 LTS 6.8.0-86.87
linux-aws Ubuntu 22.04 LTS 5.15.0-1086.93
linux-aws Ubuntu 24.04 LTS 6.8.0-1041.43
linux-gcp Ubuntu 22.04 LTS 5.15.0-1085.94
linux-gcp Ubuntu 24.04 LTS 6.8.0-1042.45
linux-gke Ubuntu 22.04 LTS 5.15.0-1083.89
linux-gke Ubuntu 24.04 LTS 6.8.0-1038.43

ubuntu advisories UBUNTU-CVE-2025-22055

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 10.0 6.12.0-55.16.1.el10_0
rv RHEL 10.0 6.12.0-55.16.1.el10_0
perf RHEL 10.0 6.12.0-55.16.1.el10_0
rtla RHEL 10.0 6.12.0-55.16.1.el10_0
libperf RHEL 10.0 6.12.0-55.16.1.el10_0
kernel-rt RHEL 10.0 6.12.0-55.16.1.el10_0
kernel-64k RHEL 10.0 6.12.0-55.16.1.el10_0
kernel-core RHEL 10.0 6.12.0-55.16.1.el10_0

red hat advisories RHSA-2025:8669 RHSA-2025:8643

kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.3.1
kernel-syms-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.3.1
kernel-source-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.3.1
kernel-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.39.1
kernel-syms-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.39.1
kernel-rt_debug Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.39.1
kernel-source-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.39.1
kernel-coco SLE Module for Confidential Computing Technical Preview 15 SP6 6.4.0-15061.21.coco15sp6.1

suse advisories SUSE-SU-2025:01967-1 SUSE-SU-2025:01964-1 SUSE-SU-2025:01919-1 SUSE-SU-2025:01707-1 SUSE-SU-2025:20344-1 SUSE-SU-2025:20355-1

kernel AlmaLinux 9 5.14.0-570.21.1.el9_6
rv AlmaLinux 9 5.14.0-570.21.1.el9_6
perf AlmaLinux 9 5.14.0-570.21.1.el9_6
rtla AlmaLinux 9 5.14.0-570.21.1.el9_6
libperf AlmaLinux 9 5.14.0-570.21.1.el9_6
kernel-rt AlmaLinux 9 5.14.0-570.21.1.el9_6
kernel-64k AlmaLinux 9 5.14.0-570.21.1.el9_6
kernel-core AlmaLinux 9 5.14.0-570.21.1.el9_6

almalinux advisories ALSA-2025:8643

kernel Rocky Linux 9 5.14.0-570.21.1.el9_6
kernel Rocky Linux 10 6.12.0-55.16.1.el10_0

rocky linux advisories RLSA-2025:8643 RLSA-2025:8669

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-2025-22055 updated 2026-11-07 cvss 7.1

kernel: net: fix geneve_opt length integer overflow

Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-570.21.1.el9_6, perf 5.14.0-570.21.1.el9_6, rtla 5.14.0-570.21.1.el9_6, python3-perf 5.14.0-570.21.1.el9_6, kernel-devel-matched 5.14.0-570.21.1.el9_6, kernel-64k-devel-matched 5.14.0-570.21.1.el9_6, +7 more
fixed: vendor fix RHSA-2025:8643
Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-55.16.1.el10_0, perf 6.12.0-55.16.1.el10_0, rtla 6.12.0-55.16.1.el10_0, python3-perf 6.12.0-55.16.1.el10_0, kernel-devel-matched 6.12.0-55.16.1.el10_0, kernel-64k-devel-matched 6.12.0-55.16.1.el10_0, +7 more
fixed: vendor fix RHSA-2025:8669
Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-570.21.1.el9_6, kernel-64k 5.14.0-570.21.1.el9_6, kernel-core 5.14.0-570.21.1.el9_6, kernel-tools 5.14.0-570.21.1.el9_6, kernel-modules 5.14.0-570.21.1.el9_6, kernel-64k-core 5.14.0-570.21.1.el9_6, +27 more
fixed: vendor fix RHSA-2025:8643
Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-55.16.1.el10_0, kernel-64k 6.12.0-55.16.1.el10_0, kernel-core 6.12.0-55.16.1.el10_0, kernel-tools 6.12.0-55.16.1.el10_0, kernel-modules 6.12.0-55.16.1.el10_0, kernel-64k-core 6.12.0-55.16.1.el10_0, +27 more
fixed: vendor fix RHSA-2025:8669
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-570.21.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.21.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.21.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.21.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.21.1.el9_6
fixed: vendor fix RHSA-2025:8643
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-55.16.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.16.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.16.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.16.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.16.1.el10_0
fixed: vendor fix RHSA-2025:8669
Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-570.21.1.el9_6, kernel-rt-64k 5.14.0-570.21.1.el9_6, kernel-rt-core 5.14.0-570.21.1.el9_6, kernel-rt-modules 5.14.0-570.21.1.el9_6, kernel-rt-64k-core 5.14.0-570.21.1.el9_6, kernel-rt-debug-core 5.14.0-570.21.1.el9_6, +14 more
fixed: vendor fix RHSA-2025:8643

show 3 more

Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-55.16.1.el10_0, kernel-rt-64k 6.12.0-55.16.1.el10_0, kernel-rt-core 6.12.0-55.16.1.el10_0, kernel-rt-modules 6.12.0-55.16.1.el10_0, kernel-rt-64k-core 6.12.0-55.16.1.el10_0, kernel-rt-debug-core 6.12.0-55.16.1.el10_0, +14 more
fixed: vendor fix RHSA-2025:8669
Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-570.21.1.el9_6, kernel-rt-kvm 5.14.0-570.21.1.el9_6, kernel-rt-core 5.14.0-570.21.1.el9_6, kernel-rt-modules 5.14.0-570.21.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.21.1.el9_6, kernel-rt-debug-core 5.14.0-570.21.1.el9_6, +6 more
fixed: vendor fix RHSA-2025:8643
Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-55.16.1.el10_0, kernel-rt-kvm 6.12.0-55.16.1.el10_0, kernel-rt-core 6.12.0-55.16.1.el10_0, kernel-rt-modules 6.12.0-55.16.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.16.1.el10_0, kernel-rt-debug-core 6.12.0-55.16.1.el10_0, +6 more
fixed: vendor fix RHSA-2025:8669

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 ICSA-26-295-11 updated 2026-10-22 cvss 7.1

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.7 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.7
affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-26-209-04 updated 2026-07-28 cvss 7.1

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.6 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.6
affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux Linux
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

CWE-190 Integer Overflow or Wraparound

Technology feeds

Linux kernel rss critical rss

References

Sources

CVE List CVE-2025-22055
NVD CVE-2025-22055

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.

Summary