Out-of-bounds Write Affecting kernel-livepatch-5_3_18-24_67-default package, versions <1-5.3.2


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating

    Threat Intelligence

    EPSS
    0.05% (23rd percentile)

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  • Snyk ID SNYK-SLES152-KERNELLIVEPATCH53182467DEFAULT-2679283
  • published 14 Apr 2022
  • disclosed 8 Jun 2021

How to fix?

Upgrade SLES:15.2 kernel-livepatch-5_3_18-24_67-default to version 1-5.3.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-5_3_18-24_67-default package and not the kernel-livepatch-5_3_18-24_67-default package as distributed by SLES. See How to fix? for SLES:15.2 relevant fixed versions and status.

The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b ("io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c ("io_uring: add IORING_OP_PROVIDE_BUFFERS") (v5.7-rc1).

CVSS Scores

version 3.1
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NVD

8.8 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Changed
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
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SUSE

7.4 high
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Red Hat

7.4 high