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NVD / CVE Program· CNA Linux

CVE-2023-53492: netfilter: nf_tables: do not ignore genmask when looking up chain by id

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: 0.16% (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 041e2ac88caef286b39064e83e825e3f53113d36, 4ae2e501331aaa506eaf760339bb2f43e5769395, 515ad530795c118f012539ed76d02bacfd426d89.

Low priority for now. Upgrade to Linux Linux 041e2ac88caef286b39064e83e825e3f53113d36, 4ae2e501331aaa506eaf760339bb2f43e5769395, 515ad530795c118f012539ed76d02bacfd426d89 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: netfilter: nf_tables: do not ignore genmask when looking up chain by id When adding a rule to a chain referring to its ID, if that chain had been deleted on the same batch, the rule might end up referring to a deleted chain. This will lead to a WARNING like following: [ 33.098431] ------------[ cut here ]------------ [ 33.098678] WARNING: CPU: 5 PID: 69 at net/netfilter/nf_tables_api.c:2037 nf_tables_chain_destroy+0x23d/0x260 [ 33.099217] Modules linked in: [ 33.099388] CPU: 5 PID: 69 Comm: kworker/5:1 Not tainted 6.4.0+ #409 [ 33.099726] Workqueue: events nf_tables_trans_destroy_work [ 33.100018] RIP: 0010:nf_tables_chain_destroy+0x23d/0x260 [ 33.100306] Code: 8b 7c 24 68 e8 64 9c ed fe 4c 89 e7 e8 5c 9c ed fe 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d 31 c0 89 c6 89 c7 c3 cc cc cc cc <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d 31 c0 89 c6 89 c7 [ 33.101271] RSP: 0018:ffffc900004ffc48 EFLAGS: 00010202 [ 33.101546] RAX: 0000000000000001 RBX: ffff888006fc0a28 RCX: 0000000000000000 [ 33.101920] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 33.102649] RBP: ffffc900004ffc78 R08: 0000000000000000 R09: 0000000000000000 [ 33.103018] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880135ef500 [ 33.103385] R13: 0000000000000000 R14: dead000000000122 R15: ffff888006fc0a10 [ 33.103762] FS: 0000000000000000(0000) GS:ffff888024c80000(0000) knlGS:0000000000000000 [ 33.104184] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.104493] CR2: 00007fe863b56a50 CR3: 00000000124b0001 CR4: 0000000000770ee0 [ 33.104872] PKRU: 55555554 [ 33.104999] Call Trace: [ 33.105113] <TASK> [ 33.105214] ? show_regs+0x72/0x90 [ 33.105371] ? __warn+0xa5/0x210 [ 33.105520] ? nf_tables_chain_destroy+0x23d/0x260 [ 33.105732] ? report_bug+0x1f2/0x200 [ 33.105902] ? handle_bug+0x46/0x90 [ 33.106546] ? exc_invalid_op+0x19/0x50 [ 33.106762] ? asm_exc_invalid_op+0x1b/0x20 [ 33.106995] ? nf_tables_chain_destroy+0x23d/0x260 [ 33.107249] ? nf_tables_chain_destroy+0x30/0x260 [ 33.107506] nf_tables_trans_destroy_work+0x669/0x680 [ 33.107782] ? mark_held_locks+0x28/0xa0 [ 33.107996] ? __pfx_nf_tables_trans_destroy_work+0x10/0x10 [ 33.108294] ? _raw_spin_unlock_irq+0x28/0x70 [ 33.108538] process_one_work+0x68c/0xb70 [ 33.108755] ? lock_acquire+0x17f/0x420 [ 33.108977] ? __pfx_process_one_work+0x10/0x10 [ 33.109218] ? do_raw_spin_lock+0x128/0x1d0 [ 33.109435] ? _raw_spin_lock_irq+0x71/0x80 [ 33.109634] worker_thread+0x2bd/0x700 [ 33.109817] ? __pfx_worker_thread+0x10/0x10 [ 33.110254] kthread+0x18b/0x1d0 [ 33.110410] ? __pfx_kthread+0x10/0x10 [ 33.110581] ret_from_fork+0x29/0x50 [ 33.110757] </TASK> [ 33.110866] irq event stamp: 1651 [ 33.111017] hardirqs last enabled at (1659): [<ffffffffa206a209>] __up_console_sem+0x79/0xa0 [ 33.111379] hardirqs last disabled at (1666): [<ffffffffa206a1ee>] __up_console_sem+0x5e/0xa0 [ 33.111740] softirqs last enabled at (1616): [<ffffffffa1f5d40e>] __irq_exit_rcu+0x9e/0xe0 [ 33.112094] softirqs last disabled at (1367): [<ffffffffa1f5d40e>] __irq_exit_rcu+0x9e/0xe0 [ 33.112453] ---[ end trace 0000000000000000 ]--- This is due to the nft_chain_lookup_byid ignoring the genmask. After this change, adding the new rule will fail as it will not find the chain.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Oct 1, 2025
Updated
Oct 15, 2026
EPSS
0.1% · 6th percentile
CWE
—

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 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

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

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  • when exploit code appears or is weaponized
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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 kernel5.9 and later · before 5.10.188
  • linux linux kernel5.11 and later · before 5.15.121
  • linux linux kernel5.16 and later · before 6.1.39
  • linux linux kernel6.2 and later · before 6.4.4
  • linux linux kernel6.5

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

    • 5.9affected
    • 837830a4b439bfeb86c70b0115c280377c84714b and later · before 4ae2e501331aaa506eaf760339bb2f43e5769395affected · git
    • 837830a4b439bfeb86c70b0115c280377c84714b and later · before 041e2ac88caef286b39064e83e825e3f53113d36affected · git
    • 837830a4b439bfeb86c70b0115c280377c84714b and later · before fc95c8b02c6160936f1f3d8d9d7f4f66f3c84b49affected · git
    • 837830a4b439bfeb86c70b0115c280377c84714b and later · before 5e5e967e8505fbdabfb6497367ec1b808cadc356affected · git
    • 837830a4b439bfeb86c70b0115c280377c84714b and later · before 515ad530795c118f012539ed76d02bacfd426d89affected · git
    • before 5.9not affected · semver
    • 5.10.188 and later · up to and including 5.10.*not affected · semver
    • 5.15.121 and later · up to and including 5.15.*not affected · semver
    • 6.1.39 and later · up to and including 6.1.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.52-16.1.52-1
Debian:13linuxbefore 6.4.4-16.4.4-1
Red Hat:rhel_eus:9.0::appstreambpftool-debuginfobefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debug-debuginfobefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debug-develbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debug-devel-matchedbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfobefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfo-common-aarch64before 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfo-common-ppc64lebefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfo-common-s390xbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfo-common-x86_64before 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-develbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-devel-matchedbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-docbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-tools-debuginfobefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-zfcpdump-debuginfobefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-zfcpdump-develbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-zfcpdump-devel-matchedbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamperfbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreamperf-debuginfobefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::appstreampython3-perf-debuginfobefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::baseosbpftoolbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::baseoskernelbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0
Red Hat:rhel_eus:9.0::baseoskernel-abi-stablelistsbefore 0:5.14.0-70.75.1.el9_00:5.14.0-70.75.1.el9_0

+15

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-2023-53484Oct 1, 2025 · lib: cpu_rmap: Avoid use after free on rmap->obj array entries
    31Monitor
  • ← EarlierCVE-2023-53491Oct 1, 2025 · start_kernel: Add __no_stack_protector function attribute
    22Monitor
  • Later →CVE-2023-53499Oct 1, 2025 · virtio_net: Fix error unwinding of XDP initialization
    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 Linux041e2ac88caef286b39064e83e825e3f53113d36Vendor (CNA)
Linux Linux4ae2e501331aaa506eaf760339bb2f43e5769395Vendor (CNA)
Linux Linux515ad530795c118f012539ed76d02bacfd426d89Vendor (CNA)
Linux Linux5e5e967e8505fbdabfb6497367ec1b808cadc356Vendor (CNA)
Linux Linuxfc95c8b02c6160936f1f3d8d9d7f4f66f3c84b49Vendor (CNA)
debian:linux6.1.52-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-ppc64le0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-s390x0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-x86_640:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-devel0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-devel-matched0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-doc0:5.14.0-70.75.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage 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.

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.

No nightly-computed relations.

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)

—

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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (4 more)

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

All records