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NVD / CVE Program· CNA Linux

CVE-2025-22055: net: fix geneve_opt length integer overflow

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: 0.25% (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 21748669c5825761cbbf47cbeeb01387ddccc8cb, 2952776c69a1a551649ed770bf22e3f691f6ec65, 4d606069bdd3c76f8ab1f06796c97ef7f4746807; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1.

Low priority for now. Upgrade to Linux Linux 21748669c5825761cbbf47cbeeb01387ddccc8cb, 2952776c69a1a551649ed770bf22e3f691f6ec65, 4d606069bdd3c76f8ab1f06796c97ef7f4746807; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1 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: net: fix geneve_opt length integer overflow 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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 16, 2025
Updated
Oct 15, 2026
EPSS
0.2% · 17th 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%

CNA vs NVD score

NVD
5.5
CNA · Linux
7.1
1.6 point gap

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

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

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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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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 kernel4.19 and later · before 5.10.236
  • linux linux kernel5.11 and later · before 5.15.180
  • linux linux kernel5.16 and later · before 6.1.134
  • linux linux kernel6.2 and later · before 6.6.87
  • linux linux kernel6.7 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

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

    • 4.19affected
    • 0ed5269f9e41f495c8e9020c85f5e1644c1afc57 and later · before a2cb85f989e2074e2f392e00188c438cab3de088affected · git
    • 0ed5269f9e41f495c8e9020c85f5e1644c1afc57 and later · before b4513ad0f391871d3feee8ddf535609a3aabeeacaffected · git
    • 0ed5269f9e41f495c8e9020c85f5e1644c1afc57 and later · before 21748669c5825761cbbf47cbeeb01387ddccc8cbaffected · git
    • 0ed5269f9e41f495c8e9020c85f5e1644c1afc57 and later · before 5a2976cc4d9c36ff58a0f10e35ce4283cbaa9c0eaffected · git
    • 0ed5269f9e41f495c8e9020c85f5e1644c1afc57 and later · before 2952776c69a1a551649ed770bf22e3f691f6ec65affected · git
    • 0ed5269f9e41f495c8e9020c85f5e1644c1afc57 and later · before 738ae5712215fe9181587d582b23333f02c62ca6affected · git
    • 0ed5269f9e41f495c8e9020c85f5e1644c1afc57 and later · before 4d606069bdd3c76f8ab1f06796c97ef7f4746807affected · git
    • 0ed5269f9e41f495c8e9020c85f5e1644c1afc57 and later · before b27055a08ad4b415dcf15b63034f9cb236f7fb40affected · git
    • before 4.19not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9kernelbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64kbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-corebefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-debugbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-develbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-corebefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-cross-headersbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-debugbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-debug-corebefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-debug-develbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6
AlmaLinux:9kernel-debug-modules-corebefore 5.14.0-570.21.1.el9_65.14.0-570.21.1.el9_6

+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-2025-22050Apr 16, 2025 · usbnet:fix NPE during rx_complete
    18Monitor
  • ← EarlierCVE-2025-22053Apr 16, 2025 · net: ibmveth: make veth_pool_store stop hanging
    22Monitor
  • Later →CVE-2025-22056Apr 16, 2025 · netfilter: nft_tunnel: fix geneve_opt type confusion addition
    31Monitor

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 Linux21748669c5825761cbbf47cbeeb01387ddccc8cbVendor (CNA)
Linux Linux2952776c69a1a551649ed770bf22e3f691f6ec65Vendor (CNA)
Linux Linux4d606069bdd3c76f8ab1f06796c97ef7f4746807Vendor (CNA)
Linux Linux5a2976cc4d9c36ff58a0f10e35ce4283cbaa9c0eVendor (CNA)
Linux Linux738ae5712215fe9181587d582b23333f02c62ca6Vendor (CNA)
Linux Linuxa2cb85f989e2074e2f392e00188c438cab3de088Vendor (CNA)
Linux Linuxb27055a08ad4b415dcf15b63034f9cb236f7fb40Vendor (CNA)
Linux Linuxb4513ad0f391871d3feee8ddf535609a3aabeeacVendor (CNA)
azl3 kernel 6.6.85.1-4 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.92.2-1 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-570.21.1.el9_6 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.135-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-570.21.1.el9_6 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-570.21.1.el9_6 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-570.21.1.el9_6 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-570.21.1.el9_6 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-570.21.1.el9_6 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-570.21.1.el9_6 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-570.21.1.el9_6 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+18

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-2026-31633373 days apartrxrpc: Fix integer overflow in rxgk_verify_response()
    39Monitor
  • CVE-2026-31649373 days apartnet: stmmac: fix integer underflow in chain mode
    39Monitor
  • CVE-2026-31659373 days apartbatman-adv: reject oversized global TT response buffers
    39Monitor
  • CVE-2026-43341387 days apartnet/ipv6: ioam6: prevent schema length wraparound in trace fill
    39Monitor
  • CVE-2026-46039406 days apartrxgk: Fix potential integer overflow in length check
    39Monitor
  • CVE-2026-46325419 days apartRDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE
    39Monitor

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-190 · Integer Overflow or Wraparound

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (11 more)

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

All records