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CVE-2024-50169

vsock: Update rx_bytes on read_skb()

No known exploitation. EPSS puts it in the 11th percentile. Fixed versions are out.

CVSS 3.15.5MediumEPSS percentile11th0.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products3 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • LinuxAffected: ≥ 634f1a7110b439c65fd8a809171c1d2d28bcea6f, < 66cd51de31c682a311c2fa25c580b7ea45859dd9Upgrade to: 66cd51de31c682a311c2fa25c580b7ea45859dd9Affected: ≥ 634f1a7110b439c65fd8a809171c1d2d28bcea6f, < e5ca2b98090b4bb1c393088c724af6c37812a829Upgrade to: e5ca2b98090b4bb1c393088c724af6c37812a829Affected: ≥ 634f1a7110b439c65fd8a809171c1d2d28bcea6f, < 3543152f2d330141d9394d28855cb90b860091d2Upgrade to: 3543152f2d330141d9394d28855cb90b860091d2Stated by: CVE record
  • Сообщество свободного программного обеспечения Debian GNU/LinuxAffected: 11Upgrade to: not statedStated by: BDU
  • ООО «РусБИТех-Астра» Astra Linux Special EditionAffected: 1.8Upgrade to: not statedStated by: BDU
  • АО «НППКТ» ОСОН ОСнова ОnyxAffected: до 2.12Upgrade to: not statedStated by: BDU
  • Сообщество свободного программного обеспечения LinuxAffected: от 6.7 до 6.11.6Upgrade to: not statedStated by: BDU

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

In the Linux kernel, the following vulnerability has been resolved: vsock: Update rx_bytes on read_skb() Make sure virtio_transport_inc_rx_pkt() and virtio_transport_dec_rx_pkt() calls are balanced (i.e. virtio_vsock_sock::rx_bytes doesn't lie) after vsock_transport::read_skb(). While here, also inform the peer that we've freed up space and it has more credit. Failing to update rx_bytes after packet is dequeued leads to a warning on SOCK_STREAM recv(): [ 233.396654] rx_queue is empty, but rx_bytes is non-zero [ 233.396702] WARNING: CPU: 11 PID: 40601 at net/vmw_vsock/virtio_transport_common.c:589

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS11th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.2% chance of exploitation activity in the next 30 days, which ranks it in the 11th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 595 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Publishedweakness classified

Affected products

And 1 more affected product. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 5.5 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

And 6 more references. See all after sign-in

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