CVE-2021-47523 Affecting kernel-livepatch-5_14_21-150500_55_68-default package, versions <1-150500.11.3.1


Severity

Recommended
0.0
low
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-SLES155-KERNELLIVEPATCH514211505005568DEFAULT-7379733
  • published26 Jun 2024
  • disclosed25 Jun 2024

Introduced: 25 Jun 2024

CVE-2021-47523  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 kernel-livepatch-5_14_21-150500_55_68-default to version 1-150500.11.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-5_14_21-150500_55_68-default package and not the kernel-livepatch-5_14_21-150500_55_68-default package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr

This buffer is currently allocated in hfi1_init():

if (reinit)
    ret = init_after_reset(dd);
else
    ret = loadtime_init(dd);
if (ret)
    goto done;

/* allocate dummy tail memory for all receive contexts */ dd-&gt;rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&amp;dd-&gt;pcidev-&gt;dev, sizeof(u64), &amp;dd-&gt;rcvhdrtail_dummy_dma, GFP_KERNEL);

if (!dd-&gt;rcvhdrtail_dummy_kvaddr) { dd_dev_err(dd, &#34;cannot allocate dummy tail memory\n&#34;); ret = -ENOMEM; goto done; }

The reinit triggered path will overwrite the old allocation and leak it.

Fix by moving the allocation to hfi1_alloc_devdata() and the deallocation to hfi1_free_devdata().

CVSS Scores

version 3.1