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Ubuntu: (CVE-2021-46998): linux vulnerability

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Ubuntu: (CVE-2021-46998): linux vulnerability

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
02/28/2024
Created
11/21/2024
Added
11/19/2024
Modified
02/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside enic_queue_wq_skb, if some error happens, the skb will be freed by dev_kfree_skb(skb). But the freed skb is still used in skb_tx_timestamp(skb). My patch makes enic_queue_wq_skb() return error and goto spin_unlock() incase of error. The solution is provided by Govind. See https://lkml.org/lkml/2021/4/30/961.

Solution(s)

  • ubuntu-upgrade-linux
  • ubuntu-upgrade-linux-aws
  • ubuntu-upgrade-linux-aws-5-4
  • ubuntu-upgrade-linux-aws-fips
  • ubuntu-upgrade-linux-azure
  • ubuntu-upgrade-linux-azure-5-4
  • ubuntu-upgrade-linux-azure-fips
  • ubuntu-upgrade-linux-bluefield
  • ubuntu-upgrade-linux-fips
  • ubuntu-upgrade-linux-gcp
  • ubuntu-upgrade-linux-gcp-5-4
  • ubuntu-upgrade-linux-gcp-fips
  • ubuntu-upgrade-linux-gkeop
  • ubuntu-upgrade-linux-hwe-5-4
  • ubuntu-upgrade-linux-kvm
  • ubuntu-upgrade-linux-oracle
  • ubuntu-upgrade-linux-oracle-5-4
  • ubuntu-upgrade-linux-raspi
  • ubuntu-upgrade-linux-raspi-5-4

References

  • https://attackerkb.com/topics/cve-2021-46998
  • CVE - 2021-46998
  • https://git.kernel.org/linus/643001b47adc844ae33510c4bb93c236667008a3
  • https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976
  • https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3
  • https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3
  • https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1
  • https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24
  • https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3
  • https://www.cve.org/CVERecord?id=CVE-2021-46998
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