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CVE-2026-23226Patch(linux / linux_kernel)

LOWCVSS 7.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch linux linux_kernel systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

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0.5/ 10 priority

Sources & remediation

Patch / fix
Other references
Weakness type (CWE)
CWE-416

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • Patch or workaround signal is available
  • 4 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 3 signals
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • Peaked 1d ago at 3 mentions (2026-02-18); latest day: 1
  • 4 total mentions across 2 days

Affected systems

Vendors
linux
Products
linux_kernel

Deep dive

Activity timeline4 mentions / 2d
01223Mentions · 2026-02-18: 3Mentions · 2026-04-08: 1Patch / Workaround · 2026-02-18: 1Patch / Workaround · 2026-04-08: 1Technical Details · 2026-02-18: 2Technical Details · 2026-04-08: 102-1804-08
Signal classification3 categories
Patch
250.0%
Disclosure
125.0%
General
125.0%
Referenced assets4 URLs
Classification over time
DateTotalLabels
2026-02-183
Disclosure1General1Patch1
2026-04-081
Patch1
Full discourse4 posts
  • Orca Security@orcasec
    Patch

    🚨 CVE-2026-23226: How a Missing Lock in ksmbd's Channel List Exposes Your Linux SMB3 Server All an attacker needs: valid SMB credentials + access to port 445. The fix is merged, patch now or disable SMB3 multichannel. 👉 Full breakdown here: https://orca.security/resources/blog/cve-2026-23226-ksmbd-smb3-linux-kernel-uaf/?utm_source=twitter&utm_medium=organic+social&utm_campaign=orca+blog https://t.co/YzWnj8nU3i

    Post summary

    The tweet outlines the CVE‑2026‑23226 missing‑lock flaw in ksmbd, confirms a patch has been merged, and recommends disabling SMB3 multichannel as a workaround.

    01020429
    4.8K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-23226 Use-After-Free Vulnerability in Linux Kernel ksmbd Multi-Channel Sessions https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-23226

    Post summary

    This brief notice announces the existence of a use‑after‑free vulnerability (CVE‑2026‑23226) in Linux kernel ksmbd multi‑channel sessions, with no additional details on PoC, exploitation, patching, or false positives.

    0000150
    4.0K followersView on X
  • VulDB 🛡@vuldb
    General

    We have just added an important vulnerability affecting Linux Kernel (CVE-2026-23226) https://vuldb.com/?id.346540

    Post summary

    A new Linux Kernel vulnerability (CVE-2026-23226) has been reported on vuldb.com, but no additional details such as PoC, exploitation evidence, patches, or technical specifics are provided.

    0000163
    2.1K followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-23226 In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchroni… https://www.cve.org/CVERecord?id=CVE-2026-23226

    Post summary

    CVE‑2026‑23226 was fixed in the Linux kernel by adding a lock to protect the ksmbd_chann_list xarray, addressing the synchronization issue.

    00000109
    56.4K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---

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