CVE-2024-53177

System crash via cached-directory lease race

Published Dec 27, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel SMB client allows local users to crash the system through a malicious or compromised SMB server. On a lease-parsing error, open_cached_dir() directly frees the cached file identifier while queued lease-break work can still dereference it in smb2_cached_lease_break(). When directory leases and the error path race, the stale work item reads freed slab memory, producing a kernel oops or panic rather than a documented data disclosure.

CVSS severity7.8
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in the Linux kernel SMB client allows local users to crash the system through a malicious or compromised SMB server. On a lease-parsing error, open_cached_dir() directly frees the cached file identifier while queued lease-break work can still dereference it in smb2_cached_lease_break(). When directory leases and the error path race, the stale work item reads freed slab memory, producing a kernel oops or panic rather than a documented data disclosure.

The record

CVE
CVE-2024-53177
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5c86919455c1edec99ebd3338ad213b59271a71b <47655a12c6b1bca8fa230085eab2e85a076932b7
  2. Affected versionversion=5c86919455c1edec99ebd3338ad213b59271a71b <97e2afcac0bebfef6a5360f4267ce4c44507b845
  3. Affected versionversion=5c86919455c1edec99ebd3338ad213b59271a71b <a9685b409a03b73d2980bbfa53eb47555802d0a9
  4. Affected versionversion=6.5.13 <6.6
  5. Affected versionversion=6.6.3 <6.6.64
  6. Affected versionversion=6.7
  7. Affected versionversion=6db94d08359c43f2c8fe372811cdee04564a41b9
  8. Affected versionversion=93877b9afc2994c89362007aac480a7b150f386f <791f833053578b9fd24252ebb7162a61bc3f805b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5c86919455c1edec99ebd3338ad213b59271a71b <47655a12c6b1bca8fa230085eab2e85a076932b7; version=5c86919455c1edec99ebd3338ad213b59271a71b <97e2afcac0bebfef6a5360f4267ce4c44507b845; version=5c86919455c1edec99ebd3338ad213b59271a71b <a9685b409a03b73d2980bbfa53eb47555802d0a9; version=6.5.13 <6.6; version=6.6.3 <6.6.64; version=6.7; version=6db94d08359c43f2c8fe372811cdee04564a41b9; version=93877b9afc2994c89362007aac480a7b150f386f <791f833053578b9fd24252ebb7162a61bc3f805b

Published CVSS scores

7.8CISA ADP VulnrichmentCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo