CVE-2024-36919

Kernel crash via locked session-resource release

Published May 30, 2024 · Updated May 11, 2026

Improper locking in the Linux kernel bnx2fc driver allows local users to trigger a system crash during Fibre Channel session upload. The bnx2fc_free_session_resc() path holds a bottom-half spinlock while freeing uploaded-session DMA resources, causing vunmap() to reach a BUG_ON. Reachability requires local low-privileged access and an active bnx2fc Fibre Channel over Ethernet session; the documented consequence is a kernel crash and reboot.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel bnx2fc driver allows local users to trigger a system crash during Fibre Channel session upload. The bnx2fc_free_session_resc() path holds a bottom-half spinlock while freeing uploaded-session DMA resources, causing vunmap() to reach a BUG_ON. Reachability requires local low-privileged access and an active bnx2fc Fibre Channel over Ethernet session; the documented consequence is a kernel crash and reboot.

The record

CVE
CVE-2024-36919
Published
May 30, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=3.1
  2. Affected versionversion=619c5cb6885b936c44ae1422ef805b69c6291485 <1150606d47d711d5bfdf329a1a96ed7027085936
  3. Affected versionversion=619c5cb6885b936c44ae1422ef805b69c6291485 <468f3e3c15076338367b0945b041105b67cf31e3
  4. Affected versionversion=619c5cb6885b936c44ae1422ef805b69c6291485 <93aa5ccc44781bdfef1bf0bc4c2c292d45251312
  5. Affected versionversion=619c5cb6885b936c44ae1422ef805b69c6291485 <acd370c1fb86b7302c1cbb354a7c1cd9953768eb
  6. Affected versionversion=619c5cb6885b936c44ae1422ef805b69c6291485 <ad498539dda0816aadef384ec117bfea304c75c3
  7. Affected versionversion=619c5cb6885b936c44ae1422ef805b69c6291485 <c214ed2a4dda35b308b0b28eed804d7ae66401f9
  8. Affected versionversion=619c5cb6885b936c44ae1422ef805b69c6291485 <c885ab23206b1f1ba0731ffe7c9455c6a91db256
  9. Affected versionversion=619c5cb6885b936c44ae1422ef805b69c6291485 <ea50941cd8c9f0b12f38b73d3b1bfeca660dd342

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.1; version=619c5cb6885b936c44ae1422ef805b69c6291485 <1150606d47d711d5bfdf329a1a96ed7027085936; version=619c5cb6885b936c44ae1422ef805b69c6291485 <468f3e3c15076338367b0945b041105b67cf31e3; version=619c5cb6885b936c44ae1422ef805b69c6291485 <93aa5ccc44781bdfef1bf0bc4c2c292d45251312; version=619c5cb6885b936c44ae1422ef805b69c6291485 <acd370c1fb86b7302c1cbb354a7c1cd9953768eb; version=619c5cb6885b936c44ae1422ef805b69c6291485 <ad498539dda0816aadef384ec117bfea304c75c3; version=619c5cb6885b936c44ae1422ef805b69c6291485 <c214ed2a4dda35b308b0b28eed804d7ae66401f9; version=619c5cb6885b936c44ae1422ef805b69c6291485 <c885ab23206b1f1ba0731ffe7c9455c6a91db256; version=619c5cb6885b936c44ae1422ef805b69c6291485 <ea50941cd8c9f0b12f38b73d3b1bfeca660dd342

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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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-667Improper Locking

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

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Your stack

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