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Review reviewHigh

CVE-2024-26950

Linux Linux, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, linux kernel

In the Linux kernel, the following vulnerability has been resolved: wireguard: netlink: access device through ctx instead of peer The previous commit fixed a bug that led to a NULL peer->device being dereferenced. It's actually easier and faster performance-wise to instead get the device from ctx->wg. This semantically makes more sense too, since ctx->wg->peer_allowedips.seq is compared with ctx->allowedips_seq, basing them both in ctx. This also acts as a defence in depth provision against freed peers.

CVSS
7.8
EPSS
0.24%
15.6% percentile
CISA KEV
Not listed
Published
2024.05.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.24%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: wireguard: netlink: access device through ctx instead of peer The previous commit fixed a bug that led to a NULL peer->device being dereferenced. It's actually easier and faster performance-wise to instead get the device from ctx->wg. This semantically makes more sense too, since ctx->wg->peer_allowedips.seq is compared with ctx->allowedips_seq, basing them both in ctx. This also acts as a defence in depth provision against freed peers.

Affected product and versions

Product
Linux Linux, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, linux kernel
Affected versions
>= e7096c131e5161fa3b8e52a650d7719d2857adfd < 493aa6bdcffd90a4f82aa614fe4f4db0641b4068, >= e7096c131e5161fa3b8e52a650d7719d2857adfd < 4be453271a882c8ebc28df3dbf9e4d95e6ac42f5, >= e7096c131e5161fa3b8e52a650d7719d2857adfd < 09c3fa70f65175861ca948cb2f0f791e666c90e5, >= e7096c131e5161fa3b8e52a650d7719d2857adfd < c991567e6c638079304cc15dff28748e4a3c4a37, >= e7096c131e5161fa3b8e52a650d7719d2857adfd < 93bcc1752c69bb309f4d8cfaf960ef1faeb34996, >= e7096c131e5161fa3b8e52a650d7719d2857adfd < d44bd323d8bb8031eef4bdc44547925998a11e47, >= e7096c131e5161fa3b8e52a650d7719d2857adfd < 71cbd32e3db82ea4a74e3ef9aeeaa6971969c86f, >= 5.6, >= 5.6 < 5.10.215, >= 5.11 < 5.15.154, >= 5.16 < 6.1.84, >= 6.2 < 6.6.24, >= 6.7 < 6.7.12, >= 6.8 < 6.8.3, 10.0
Fixed versions
5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-476