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🛡️ CVE-2023-54048 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

RDMA/bnxt_re: Prevent handling any completions after qp destroy

In the Linux kernel, the following vulnerability has been resolved:

RDMA/bnxt_re: Prevent handling any completions after qp destroy

HW may generate completions that indicates QP is destroyed.

Driver should not be scheduling any more completion handlers

for this QP, after the QP is destroyed. Since CQs are active

during the QP destroy, driver may still schedule completion

handlers. This can cause a race where the destroy_cq and poll_cq

running simultaneously.

Snippet of kernel panic while doing bnxt_re driver load unload in loop.

This indicates a poll after the CQ is freed. 

[77786.481636] Call Trace:

[77786.481640]  <TASK>

[77786.481644]  bnxt_re_poll_cq+0x14a/0x620 [bnxt_re]

[77786.481658]  ? kvm_clock_read+0x14/0x30

[77786.481693]  __ib_process_cq+0x57/0x190 [ib_core]

[77786.481728]  ib_cq_poll_work+0x26/0x80 [ib_core]

[77786.481761]  process_one_work+0x1e5/0x3f0

[77786.481768]  worker_thread+0x50/0x3a0

[77786.481785]  ? __pfx_worker_thread+0x10/0x10

[77786.481790]  kthread+0xe2/0x110

[77786.481794]  ? __pfx_kthread+0x10/0x10

[77786.481797]  ret_from_fork+0x2c/0x50

To avoid this, complete all completion handlers before returning the

destroy QP. If free_cq is called soon after destroy_qp, IB stack

will cancel the CQ work before invoking the destroy_cq verb and

this will prevent any race mentioned.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2023-54048 is recorded against 2 packages.

  • kernel (from 6.2.0 up to 6.4.8)
  • unknown

Timeline and source

Published on 24 December 2025 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2023-54048 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-12-24
Updated 2026-08-20
Modified 2026-08-12
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel 6.2.0 6.4.8
unknown — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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