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NVD / CVE Program· CNA Linux

CVE-2023-52477: usb: hub: Guard against accesses to uninitialized BOS descriptors

MediumCVSS 5.5 · v3.1—No exploit Fix available

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: 0.24% (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 136f69a04e71ba3458d137aec3bb2ce1232c0289, 241f230324337ed5eae3846a554fb6d15169872c, 528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6b.

Low priority for now. Upgrade to Linux Linux 136f69a04e71ba3458d137aec3bb2ce1232c0289, 241f230324337ed5eae3846a554fb6d15169872c, 528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6b 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: usb: hub: Guard against accesses to uninitialized BOS descriptors Many functions in drivers/usb/core/hub.c and drivers/usb/core/hub.h access fields inside udev->bos without checking if it was allocated and initialized. If usb_get_bos_descriptor() fails for whatever reason, udev->bos will be NULL and those accesses will result in a crash: BUG: kernel NULL pointer dereference, address: 0000000000000018 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 5 PID: 17818 Comm: kworker/5:1 Tainted: G W 5.15.108-18910-gab0e1cb584e1 #1 <HASH:1f9e 1> Hardware name: Google Kindred/Kindred, BIOS Google_Kindred.12672.413.0 02/03/2021 Workqueue: usb_hub_wq hub_event RIP: 0010:hub_port_reset+0x193/0x788 Code: 89 f7 e8 20 f7 15 00 48 8b 43 08 80 b8 96 03 00 00 03 75 36 0f b7 88 92 03 00 00 81 f9 10 03 00 00 72 27 48 8b 80 a8 03 00 00 <48> 83 78 18 00 74 19 48 89 df 48 8b 75 b0 ba 02 00 00 00 4c 89 e9 RSP: 0018:ffffab740c53fcf8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffa1bc5f678000 RCX: 0000000000000310 RDX: fffffffffffffdff RSI: 0000000000000286 RDI: ffffa1be9655b840 RBP: ffffab740c53fd70 R08: 00001b7d5edaa20c R09: ffffffffb005e060 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffffab740c53fd3e R14: 0000000000000032 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffffa1be96540000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 000000022e80c005 CR4: 00000000003706e0 Call Trace: hub_event+0x73f/0x156e ? hub_activate+0x5b7/0x68f process_one_work+0x1a2/0x487 worker_thread+0x11a/0x288 kthread+0x13a/0x152 ? process_one_work+0x487/0x487 ? kthread_associate_blkcg+0x70/0x70 ret_from_fork+0x1f/0x30 Fall back to a default behavior if the BOS descriptor isn't accessible and skip all the functionalities that depend on it: LPM support checks, Super Speed capabilitiy checks, U1/U2 states setup.

Published
Feb 29, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 15th 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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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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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 kernelbefore 4.14.328
  • linux linux kernel4.15 and later · before 4.19.297
  • linux linux kernel4.20 and later · before 5.4.259
  • linux linux kernel5.5 and later · before 5.10.199
  • linux linux kernel5.11 and later · before 5.15.136
  • linux linux kernel5.16 and later · before 6.1.59
  • linux linux kernel6.2 and later · before 6.5.8
  • linux linux kernel6.6

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

    • 4.6affected
    • 0cdd49a1d1a483d80170d9e592f832274e8bce1b and later · before c64e4dca9aefd232b17ac4c779b608b286654e81affected · git
    • 0cdd49a1d1a483d80170d9e592f832274e8bce1b and later · before 8e7346bfea56453e31b7421c1c17ca2fb9ed613daffected · git
    • 0cdd49a1d1a483d80170d9e592f832274e8bce1b and later · before 6ad3e9fd3632106696692232bf7ff88b9f7e1bc3affected · git
    • 0cdd49a1d1a483d80170d9e592f832274e8bce1b and later · before 241f230324337ed5eae3846a554fb6d15169872caffected · git
    • 0cdd49a1d1a483d80170d9e592f832274e8bce1b and later · before 528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6baffected · git
    • 0cdd49a1d1a483d80170d9e592f832274e8bce1b and later · before fb9895ab9533534335fa83d70344b397ac862c81affected · git
    • 0cdd49a1d1a483d80170d9e592f832274e8bce1b and later · before 136f69a04e71ba3458d137aec3bb2ce1232c0289affected · git
    • 0cdd49a1d1a483d80170d9e592f832274e8bce1b and later · before f74a7afc224acd5e922c7a2e52244d891bbe44eeaffected · git
    • before 4.6not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-kvmbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10

+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-2023-52475Feb 29, 2024 · Input: powermate - fix use-after-free in powermate_config_complete
    31Monitor
  • ← EarlierCVE-2023-52476Feb 29, 2024 · perf/x86/lbr: Filter vsyscall addresses
    22Monitor
  • Later →CVE-2023-52478Feb 29, 2024 · HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect
    18Monitor

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 Linux136f69a04e71ba3458d137aec3bb2ce1232c0289Vendor (CNA)
Linux Linux241f230324337ed5eae3846a554fb6d15169872cVendor (CNA)
Linux Linux528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6bVendor (CNA)
Linux Linux6ad3e9fd3632106696692232bf7ff88b9f7e1bc3Vendor (CNA)
Linux Linux8e7346bfea56453e31b7421c1c17ca2fb9ed613dVendor (CNA)
Linux Linuxc64e4dca9aefd232b17ac4c779b608b286654e81Vendor (CNA)
Linux Linuxf74a7afc224acd5e922c7a2e52244d891bbe44eeVendor (CNA)
Linux Linuxfb9895ab9533534335fa83d70344b397ac862c81Vendor (CNA)
almalinux:bpftool4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.64-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

+5

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
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