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Linux KernelOperating system · Linux

CVE-2026-46177

HIGH · 7.5 CVSS v3.1 Published 2026-05-28
Fix available
A fix is available. Upgrade to 5.10.258 / 5.15.209 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: ipmi: Add limits to event and receive message requests The driver would just fetch events and receive messages until the BMC said it was done. To avoid issues with BMCs that never say they are done, add a limit of 10 fetches at a time. In addition, an si interface has an attn state it can return from the hardware which is supposed to cause a flag fetch to see if the driver needs to fetch events or message or a few other things. If the attn bit gets stuck, it's a similar problem. So allow messages in between flag fetches so the driver itself doesn't get stuck. This is a more general fix than the previous fix for the specific bad BMC, but should fix the more general issue of a BMC that won't stop saying it has data. This has been there from the beginning of the driver. It's not a bug per-se, but it is accounting for bugs in BMCs.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 2.6.12.1, < 5.10.258>= 5.11, < 5.15.209>= 5.16, < 6.1.175>= 6.2, < 6.6.140>= 6.7, < 6.12.88>= 6.13, < 6.18.30>= 6.19, < 7.0.7= 2.6.12= 7.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.10.258 / 5.15.209 / 6.1.175 or later
Fixed in 5.10.2585.15.2096.1.175
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel 5.10.258, 5.15.209, 6.1.175, or 6.6.140 (or later stable) depending on your current branch

  1. 1. Identify the currently running Linux kernel version using `uname -r`
  2. 2. Check which version branch your current kernel belongs to (e.g., 5.10.x, 5.15.x, 6.1.x, or 6.2.x through 6.6.x)
  3. 3. Upgrade the Linux kernel to a version at or above the first fixed release for your branch: for 5.10.x upgrade to >= 5.10.258, for 5.15.x upgrade to >= 5.15.209, for 6.1.x upgrade to >= 6.1.175, or for 6.2.x-6.6.x upgrade to >= 6.6.140
  4. 4. If using a distribution-provided kernel, update via the distribution's package manager (e.g., `apt update && apt upgrade`, `yum update`, `dnf upgrade`, or `pacman -Syu`)
  5. 5. Reboot the system to load the patched kernel
  6. 6. Verify the kernel version after reboot using `uname -r` to confirm the fix is applied
Caveat Kernel upgrades may require rebuilding out-of-tree modules; verify driver compatibility before rebooting

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-46177 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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