BlackTreeIndependent security intelligence

Full vulnerability report · 2025

CVE-2023-53147High confidence

xfrm: add NULL check in xfrm_update_ae_params

Linux · Linux

5.5MediumCVSS 3.1

Recommended action

Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available

Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

9 package states

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu release	Source package	Vendor state	Fixed version	Evidence
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure-6.11`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gcp-6.11`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-hwe-6.11`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-intel`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-lowlatency-hwe-6.11`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-oem-6.11`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-raspi-realtime`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-realtime`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-riscv`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current

ENISA EUVD identifier

EUVD-2023-59820

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state: Present in the current official mapping
Known exploitation: Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score: Not supplied in the stored EUVD record
Advisory evidence: No linked advisory details stored yet

Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available

What, why and how

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.

What

Why

The product dereferences a pointer that it expects to be valid but is NULL.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

What

Why

The product dereferences a pointer that it expects to be valid but is NULL.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: local access → NULL Pointer Dereference → disrupt the affected service
Attack surface: Local
Privileges required: Low: a basic authenticated account is required
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-476 ↗
CWE-476: NULL Pointer Dereference. The product dereferences a pointer that it expects to be valid but is NULL.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.

Denial of serviceCWE-476

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2023-59820Official EUVD mapping

0 linked advisory records.

Official EUVD record

BSI · German · WID-SEC-W-2026-0349Dell Avamar und NetWorker: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Dell Avamar und Dell NetWorker ausnutzen, um Angriffe zu starten, die die Integrität, Vertraulichkeit und Verfügbarkeit von Systemen beeinträchtigen.

Official advisory

BSI · German · WID-SEC-W-2025-2053Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder nicht näher beschriebene Auswirkungen zu erzielen.

Official advisory

CERT-FR · French · CERTFR-2025-AVI-1073Multiples vulnérabilités dans le noyau Linux de SUSE

ord?id=CVE-2022-50577 Référence CVE CVE-2022-50578 https://www.cve.org/CVERecord?id=CVE-2022-50578 Référence CVE CVE-2022-50579 https://www.cve.org/CVERecord?id=CVE-2022-50579 Référence CVE CVE-2022-50580 https://www.cve.org/CVERecord?id=CVE-2022-50580 Référence CVE CVE-2022-50581 https://www.cve.org/CVERecord?id=CVE-2022-50581 Référence CVE CVE-2022-50582 https://www.cve.org/CVERecord?id=CVE-2022-50582 Référence CVE CVE-2023-28328 https://www.cve.org/CVERecord?id=CVE-2023-28328 Référence CVE CVE-2023-3772 https://www.cve.org/CVERecord?id=CVE-2023-3772 Référence CVE CVE-2023-52923 https://www.cve.org/CVERecord?id=CVE-2023-52923 Référence CVE CVE-2023-53147 https://www.cve.org/CVERecord?id=CVE-2023-53147 Référence CVE CVE-2023-53282 https://www.cve.org/CVERecord?id=CVE-2023-53282 Référence CVE CVE-2023-53322 https://www.cve.org/CVERecord?id=CVE-2023-53322 Référence CVE CVE-2023-53365 https://www.cve.org/CVERecord?id=CVE-2023-53365 Référence CVE CVE-2023-53395 https://www.cve.org/CVERecord?id=CVE-2023-53395 Référence CVE CVE-2023-53500 https://www.cve.org/CVERecord?id=CVE-2023-53500 Référence CVE CVE-2023-53533 https://www.cve.org/CVERecord?id=CVE-2023-53533 Référence CVE CVE-2023-53534 https://www.cve.org/CVERecord?id=CVE-2023-53534 Référence CVE CVE-2023-53538 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2025-AVI-1032Multiples vulnérabilités dans le noyau Linux de SUSE

ord?id=CVE-2022-50579 Référence CVE CVE-2022-50580 https://www.cve.org/CVERecord?id=CVE-2022-50580 Référence CVE CVE-2022-50581 https://www.cve.org/CVERecord?id=CVE-2022-50581 Référence CVE CVE-2022-50582 https://www.cve.org/CVERecord?id=CVE-2022-50582 Référence CVE CVE-2023-31248 https://www.cve.org/CVERecord?id=CVE-2023-31248 Référence CVE CVE-2023-3772 https://www.cve.org/CVERecord?id=CVE-2023-3772 Référence CVE CVE-2023-39197 https://www.cve.org/CVERecord?id=CVE-2023-39197 Référence CVE CVE-2023-42753 https://www.cve.org/CVERecord?id=CVE-2023-42753 Référence CVE CVE-2023-52923 https://www.cve.org/CVERecord?id=CVE-2023-52923 Référence CVE CVE-2023-53147 https://www.cve.org/CVERecord?id=CVE-2023-53147 Référence CVE CVE-2023-53148 https://www.cve.org/CVERecord?id=CVE-2023-53148 Référence CVE CVE-2023-53150 https://www.cve.org/CVERecord?id=CVE-2023-53150 Référence CVE CVE-2023-53151 https://www.cve.org/CVERecord?id=CVE-2023-53151 Référence CVE CVE-2023-53152 https://www.cve.org/CVERecord?id=CVE-2023-53152 Référence CVE CVE-2023-53165 https://www.cve.org/CVERecord?id=CVE-2023-53165 Référence CVE CVE-2023-53167 https://www.cve.org/CVERecord?id=CVE-2023-53167 Référence CVE CVE-2023-53170 https://www.cve.org/CVERecord?id=CVE-2023-53170 Référence CVE CVE-2023-53174 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2025-AVI-1009Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53128 Référence CVE CVE-2023-53131 https://www.cve.org/CVERecord?id=CVE-2023-53131 Référence CVE CVE-2023-53134 https://www.cve.org/CVERecord?id=CVE-2023-53134 Référence CVE CVE-2023-53137 https://www.cve.org/CVERecord?id=CVE-2023-53137 Référence CVE CVE-2023-53139 https://www.cve.org/CVERecord?id=CVE-2023-53139 Référence CVE CVE-2023-53140 https://www.cve.org/CVERecord?id=CVE-2023-53140 Référence CVE CVE-2023-53142 https://www.cve.org/CVERecord?id=CVE-2023-53142 Référence CVE CVE-2023-53143 https://www.cve.org/CVERecord?id=CVE-2023-53143 Référence CVE CVE-2023-53145 https://www.cve.org/CVERecord?id=CVE-2023-53145 Référence CVE CVE-2023-53147 https://www.cve.org/CVERecord?id=CVE-2023-53147 Référence CVE CVE-2023-53148 https://www.cve.org/CVERecord?id=CVE-2023-53148 Référence CVE CVE-2023-53150 https://www.cve.org/CVERecord?id=CVE-2023-53150 Référence CVE CVE-2023-53151 https://www.cve.org/CVERecord?id=CVE-2023-53151 Référence CVE CVE-2023-53152 https://www.cve.org/CVERecord?id=CVE-2023-53152 Référence CVE CVE-2023-53165 https://www.cve.org/CVERecord?id=CVE-2023-53165 Référence CVE CVE-2023-53167 https://www.cve.org/CVERecord?id=CVE-2023-53167 Référence CVE CVE-2023-53170 https://www.cve.org/CVERecord?id=CVE-2023-53170 Référence CVE CVE-2023-53174 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2025-AVI-0921Multiples vulnérabilités dans le noyau Linux de SUSE

CVERecord?id=CVE-2023-28328 Référence CVE CVE-2023-31248 https://www.cve.org/CVERecord?id=CVE-2023-31248 Référence CVE CVE-2023-3772 https://www.cve.org/CVERecord?id=CVE-2023-3772 Référence CVE CVE-2023-3867 https://www.cve.org/CVERecord?id=CVE-2023-3867 Référence CVE CVE-2023-39197 https://www.cve.org/CVERecord?id=CVE-2023-39197 Référence CVE CVE-2023-4130 https://www.cve.org/CVERecord?id=CVE-2023-4130 Référence CVE CVE-2023-42753 https://www.cve.org/CVERecord?id=CVE-2023-42753 Référence CVE CVE-2023-4515 https://www.cve.org/CVERecord?id=CVE-2023-4515 Référence CVE CVE-2023-52923 https://www.cve.org/CVERecord?id=CVE-2023-52923 Référence CVE CVE-2023-53147 https://www.cve.org/CVERecord?id=CVE-2023-53147 Référence CVE CVE-2023-53148 https://www.cve.org/CVERecord?id=CVE-2023-53148 Référence CVE CVE-2023-53149 https://www.cve.org/CVERecord?id=CVE-2023-53149 Référence CVE CVE-2023-53150 https://www.cve.org/CVERecord?id=CVE-2023-53150 Référence CVE CVE-2023-53151 https://www.cve.org/CVERecord?id=CVE-2023-53151 Référence CVE CVE-2023-53152 https://www.cve.org/CVERecord?id=CVE-2023-53152 Référence CVE CVE-2023-53153 https://www.cve.org/CVERecord?id=CVE-2023-53153 Référence CVE CVE-2023-53165 https://www.cve.org/CVERecord?id=CVE-2023-53165 Référence CVE CVE-2023-53167 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2025-AVI-0895Multiples vulnérabilités dans le noyau Linux de SUSE

Official advisory

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: d8647b79c3b7e223ac051439d165bc8e7bbb832f < ed1cba039309c80b49719fcff3e3d7cdddb73d96; d8647b79c3b7e223ac051439d165bc8e7bbb832f < 44f69c96f8a147413c23c68cda4d6fb5e23137cd; d8647b79c3b7e223ac051439d165bc8e7bbb832f < 8046beb890ebc83c5820188c650073e1c6066e67; d8647b79c3b7e223ac051439d165bc8e7bbb832f < bd30aa9c7febb6e709670cd5154194189ca3b7b5; d8647b79c3b7e223ac051439d165bc8e7bbb832f < 075448a2eb753f813fe873cfa52853e9fef8eedb; d8647b79c3b7e223ac051439d165bc8e7bbb832f < 87b655f4936b6fc01f3658aa88a22c923b379ebd; d8647b79c3b7e223ac051439d165bc8e7bbb832f < 53df4be4f5221e90dc7aa9ce745a9a21bb7024f4; d8647b79c3b7e223ac051439d165bc8e7bbb832f < 00374d9b6d9f932802b55181be9831aa948e5b7c
Fixed: < 2.6.39; 4.14.324 ≤ 4.14.*; 4.19.293 ≤ 4.19.*; 5.4.255 ≤ 5.4.*; 5.10.192 ≤ 5.10.*; 5.15.128 ≤ 5.15.*; 6.1.47 ≤ 6.1.*; 6.4.12 ≤ 6.4.*
Action: Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround: No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.

Evidence and provenance

Published 15 Sept 2025 · Last source change 11 May 2026, 19:39 UTC · CWE-476 · NULL Pointer Dereference

CVE recordCVE.org · 5.2

CVSS sourceNIST NVD

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2023-59820

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceNIST NVD

NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

2025-09-15CVE published

2026-05-11Fixed release or patch reference recorded

ENISA EUVD · EUVD-2023-59820↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

xfrm: add NULL check in xfrm_update_ae_params

National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

EUVD-2023-59820

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.