suse-su-2021:3718-1
Vulnerability from csaf_suse
Published
2021-11-17 09:07
Modified
2021-11-17 09:07
Summary
Security update for the Linux Kernel (Live Patch 6 for SLE 15 SP3)

Notes

Title of the patch
Security update for the Linux Kernel (Live Patch 6 for SLE 15 SP3)
Description of the patch
This update for the Linux Kernel 5.3.18-59_24 fixes several issues. The following security issues were fixed: - CVE-2021-34866: Fixed possible eBPF Type Confusion privilege escalation vulnerability via eBPF type confusion (bsc#1191646). - CVE-2021-41864: Fixed an integer overflow with a resultant out-of-bounds write in prealloc_elems_and_freelist in kernel/bpf/stackmap.c (bsc#1191318).
Patchnames
SUSE-2021-3718,SUSE-SLE-Module-Live-Patching-15-SP3-2021-3718,SUSE-SLE-Module-Live-Patching-15-SP3-2021-3719
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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          "text": "This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-14689.",
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          "text": "prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.",
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          },
          "products": [
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_13-default-6-2.2.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_13-default-6-2.2.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_13-default-6-2.2.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_24-default-2-2.2.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_24-default-2-2.2.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_24-default-2-2.2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2021-11-17T09:07:49Z",
          "details": "important"
        }
      ],
      "title": "CVE-2021-41864"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
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  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.