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CVE-2023-53147· NVD / CVE Program· CNA Linux

xfrm: add NULL check in xfrm_update_ae_params

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: 0.16% (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 00374d9b6d9f932802b55181be9831aa948e5b7c, 075448a2eb753f813fe873cfa52853e9fef8eedb, 44f69c96f8a147413c23c68cda4d6fb5e23137cd.

Low priority for now. Upgrade to Linux Linux 00374d9b6d9f932802b55181be9831aa948e5b7c, 075448a2eb753f813fe873cfa52853e9fef8eedb, 44f69c96f8a147413c23c68cda4d6fb5e23137cd 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: xfrm: add NULL check in xfrm_update_ae_params Normally, x->replay_esn and x->preplay_esn should be allocated at xfrm_alloc_replay_state_esn(...) in xfrm_state_construct(...), hence the xfrm_update_ae_params(...) is okay to update them. However, the current implementation of xfrm_new_ae(...) allows a malicious user to directly dereference a NULL pointer and crash the kernel like below. BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 8253067 P4D 8253067 PUD 8e0e067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 PID: 98 Comm: poc.npd Not tainted 6.4.0-rc7-00072-gdad9774deaf1 #8 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.o4 RIP: 0010:memcpy_orig+0xad/0x140 Code: e8 4c 89 5f e0 48 8d 7f e0 73 d2 83 c2 20 48 29 d6 48 29 d7 83 fa 10 72 34 4c 8b 06 4c 8b 4e 08 c RSP: 0018:ffff888008f57658 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff888008bd0000 RCX: ffffffff8238e571 RDX: 0000000000000018 RSI: ffff888007f64844 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888008f57818 R13: ffff888007f64aa4 R14: 0000000000000000 R15: 0000000000000000 FS: 00000000014013c0(0000) GS:ffff88806d600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000054d8000 CR4: 00000000000006f0 Call Trace: <TASK> ? __die+0x1f/0x70 ? page_fault_oops+0x1e8/0x500 ? __pfx_is_prefetch.constprop.0+0x10/0x10 ? __pfx_page_fault_oops+0x10/0x10 ? _raw_spin_unlock_irqrestore+0x11/0x40 ? fixup_exception+0x36/0x460 ? _raw_spin_unlock_irqrestore+0x11/0x40 ? exc_page_fault+0x5e/0xc0 ? asm_exc_page_fault+0x26/0x30 ? xfrm_update_ae_params+0xd1/0x260 ? memcpy_orig+0xad/0x140 ? __pfx__raw_spin_lock_bh+0x10/0x10 xfrm_update_ae_params+0xe7/0x260 xfrm_new_ae+0x298/0x4e0 ? __pfx_xfrm_new_ae+0x10/0x10 ? __pfx_xfrm_new_ae+0x10/0x10 xfrm_user_rcv_msg+0x25a/0x410 ? __pfx_xfrm_user_rcv_msg+0x10/0x10 ? __alloc_skb+0xcf/0x210 ? stack_trace_save+0x90/0xd0 ? filter_irq_stacks+0x1c/0x70 ? __stack_depot_save+0x39/0x4e0 ? __kasan_slab_free+0x10a/0x190 ? kmem_cache_free+0x9c/0x340 ? netlink_recvmsg+0x23c/0x660 ? sock_recvmsg+0xeb/0xf0 ? __sys_recvfrom+0x13c/0x1f0 ? __x64_sys_recvfrom+0x71/0x90 ? do_syscall_64+0x3f/0x90 ? entry_SYSCALL_64_after_hwframe+0x72/0xdc ? copyout+0x3e/0x50 netlink_rcv_skb+0xd6/0x210 ? __pfx_xfrm_user_rcv_msg+0x10/0x10 ? __pfx_netlink_rcv_skb+0x10/0x10 ? __pfx_sock_has_perm+0x10/0x10 ? mutex_lock+0x8d/0xe0 ? __pfx_mutex_lock+0x10/0x10 xfrm_netlink_rcv+0x44/0x50 netlink_unicast+0x36f/0x4c0 ? __pfx_netlink_unicast+0x10/0x10 ? netlink_recvmsg+0x500/0x660 netlink_sendmsg+0x3b7/0x700 This Null-ptr-deref bug is assigned CVE-2023-3772. And this commit adds additional NULL check in xfrm_update_ae_params to fix the NPD.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 15, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 4th 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 · 0.1%

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  • 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 kernel2.6.39 and later · before 4.14.324
  • linux linux kernel4.15 and later · before 4.19.293
  • linux linux kernel4.20 and later · before 5.4.255
  • linux linux kernel5.5 and later · before 5.10.192
  • linux linux kernel5.11 and later · before 5.15.128
  • linux linux kernel5.16 and later · before 6.1.47
  • linux linux kernel6.2 and later · before 6.4.12
  • 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

    • 2.6.39affected
    • d8647b79c3b7e223ac051439d165bc8e7bbb832f and later · before ed1cba039309c80b49719fcff3e3d7cdddb73d96affected · git
    • d8647b79c3b7e223ac051439d165bc8e7bbb832f and later · before 44f69c96f8a147413c23c68cda4d6fb5e23137cdaffected · git
    • d8647b79c3b7e223ac051439d165bc8e7bbb832f and later · before 8046beb890ebc83c5820188c650073e1c6066e67affected · git
    • d8647b79c3b7e223ac051439d165bc8e7bbb832f and later · before bd30aa9c7febb6e709670cd5154194189ca3b7b5affected · git
    • d8647b79c3b7e223ac051439d165bc8e7bbb832f and later · before 075448a2eb753f813fe873cfa52853e9fef8eedbaffected · git
    • d8647b79c3b7e223ac051439d165bc8e7bbb832f and later · before 87b655f4936b6fc01f3658aa88a22c923b379ebdaffected · git
    • d8647b79c3b7e223ac051439d165bc8e7bbb832f and later · before 53df4be4f5221e90dc7aa9ce745a9a21bb7024f4affected · git
    • d8647b79c3b7e223ac051439d165bc8e7bbb832f and later · before 00374d9b6d9f932802b55181be9831aa948e5b7caffected · git
    • before 2.6.39not 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 6.4.13-16.4.13-1
openSUSE:Leap 15.6dtb-aarch64before 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-64kbbefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-azurebefore 6.4.0-150600.8.52.16.4.0-150600.8.52.1
openSUSE:Leap 15.6kernel-debugbefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-defaultbefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-default-basebefore 6.4.0-150600.23.73.1.150600.12.32.16.4.0-150600.23.73.1.150600.12.32.1
openSUSE:Leap 15.6kernel-docsbefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-kvmsmallbefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-obs-buildbefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-obs-qabefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-rtbefore 6.4.0-150600.10.55.16.4.0-150600.10.55.1
openSUSE:Leap 15.6kernel-rt_debugbefore 6.4.0-150600.10.55.16.4.0-150600.10.55.1
openSUSE:Leap 15.6kernel-sourcebefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-source-azurebefore 6.4.0-150600.8.52.16.4.0-150600.8.52.1
openSUSE:Leap 15.6kernel-source-rtbefore 6.4.0-150600.10.55.16.4.0-150600.10.55.1
openSUSE:Leap 15.6kernel-symsbefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
openSUSE:Leap 15.6kernel-syms-azurebefore 6.4.0-150600.8.52.16.4.0-150600.8.52.1
openSUSE:Leap 15.6kernel-syms-rtbefore 6.4.0-150600.10.55.16.4.0-150600.10.55.1
openSUSE:Leap 15.6kernel-zfcpdumpbefore 6.4.0-150600.23.73.16.4.0-150600.23.73.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_16before 1-150600.13.3.11-150600.13.3.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6-RT_Update_16before 1-150600.1.3.11-150600.1.3.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_6before 1-150700.15.3.11-150700.15.3.1

+43

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-50260Sep 15, 2025 · drm/msm: Make .remove and .shutdown HW shutdown consistent
    22Monitor
  • ← EarlierCVE-2022-50261Sep 15, 2025 · drm/sti: Fix return type of sti_{dvo,hda,hdmi}_connector_mode_valid()
    22Monitor
  • Later →CVE-2023-53148Sep 15, 2025 · igb: Fix igb_down hung on surprise removal
    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 Linux00374d9b6d9f932802b55181be9831aa948e5b7cVendor (CNA)
Linux Linux075448a2eb753f813fe873cfa52853e9fef8eedbVendor (CNA)
Linux Linux44f69c96f8a147413c23c68cda4d6fb5e23137cdVendor (CNA)
Linux Linux53df4be4f5221e90dc7aa9ce745a9a21bb7024f4Vendor (CNA)
Linux Linux8046beb890ebc83c5820188c650073e1c6066e67Vendor (CNA)
Linux Linux87b655f4936b6fc01f3658aa88a22c923b379ebdVendor (CNA)
Linux Linuxbd30aa9c7febb6e709670cd5154194189ca3b7b5Vendor (CNA)
Linux Linuxed1cba039309c80b49719fcff3e3d7cdddb73d96Vendor (CNA)
debian:linux6.1.52-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.73.1.150600.12.32.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-docs6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-kvmsmall6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-build6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-qa6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-zfcpdump6.4.0-150600.23.73.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:kernel-64kb6.4.0-150600.23.73.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-azure6.4.0-150600.8.52.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)
suse:kernel-default6.4.0-150600.23.73.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-default-base6.4.0-150600.23.73.1.150600.12.32.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-docs6.4.0-150600.23.73.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_161-150600.13.3.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-obs-build6.4.0-150600.23.73.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-source6.4.0-150600.23.73.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-source-azure6.4.0-150600.8.52.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)

+3

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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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
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-476 · NULL Pointer Dereference

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.

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

Change log

  1. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records