VULNERABILITY

Ubuntu: (Multiple Advisories) (CVE-2024-50036): Linux kernel vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2024-50036): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:M/Au:S/C:C/I:C/A:C)
Published
10/21/2024
Created
03/10/2025
Added
02/20/2025
Modified
03/06/2025

Description

In the Linux kernel, the following vulnerability has been resolved: net: do not delay dst_entries_add() in dst_release() dst_entries_add() uses per-cpu data that might be freed at netns dismantle from ip6_route_net_exit() calling dst_entries_destroy() Before ip6_route_net_exit() can be called, we release all the dsts associated with this netns, via calls to dst_release(), which waits an rcu grace period before calling dst_destroy() dst_entries_add() use in dst_destroy() is racy, because dst_entries_destroy() could have been called already. Decrementing the number of dsts must happen sooner. Notes: 1) in CONFIG_XFRM case, dst_destroy() can call dst_release_immediate(child), this might also cause UAF if the child does not have DST_NOCOUNT set. IPSEC maintainers might take a look and see how to address this. 2) There is also discussion about removing this count of dst, which might happen in future kernels.

Solution(s)

  • ubuntu-upgrade-linux-image-5-15-0-1060-gkeop
  • ubuntu-upgrade-linux-image-5-15-0-1070-ibm
  • ubuntu-upgrade-linux-image-5-15-0-1072-nvidia
  • ubuntu-upgrade-linux-image-5-15-0-1072-nvidia-lowlatency
  • ubuntu-upgrade-linux-image-5-15-0-1072-raspi
  • ubuntu-upgrade-linux-image-5-15-0-1073-intel-iotg
  • ubuntu-upgrade-linux-image-5-15-0-1075-gke
  • ubuntu-upgrade-linux-image-5-15-0-1075-oracle
  • ubuntu-upgrade-linux-image-5-15-0-1077-gcp
  • ubuntu-upgrade-linux-image-5-15-0-1078-aws
  • ubuntu-upgrade-linux-image-5-15-0-1081-azure
  • ubuntu-upgrade-linux-image-5-15-0-1081-azure-fde
  • ubuntu-upgrade-linux-image-5-15-0-133-generic
  • ubuntu-upgrade-linux-image-5-15-0-133-generic-64k
  • ubuntu-upgrade-linux-image-5-15-0-133-generic-lpae
  • ubuntu-upgrade-linux-image-5-15-0-133-lowlatency
  • ubuntu-upgrade-linux-image-5-15-0-133-lowlatency-64k
  • ubuntu-upgrade-linux-image-5-15-0-134-generic
  • ubuntu-upgrade-linux-image-5-15-0-134-generic-64k
  • ubuntu-upgrade-linux-image-5-15-0-134-generic-lpae
  • ubuntu-upgrade-linux-image-6-11-0-1005-realtime
  • ubuntu-upgrade-linux-image-6-11-0-1008-raspi
  • ubuntu-upgrade-linux-image-6-11-0-1009-aws
  • ubuntu-upgrade-linux-image-6-11-0-1009-azure
  • ubuntu-upgrade-linux-image-6-11-0-1009-azure-fde
  • ubuntu-upgrade-linux-image-6-11-0-1009-gcp
  • ubuntu-upgrade-linux-image-6-11-0-1010-lowlatency
  • ubuntu-upgrade-linux-image-6-11-0-1010-lowlatency-64k
  • ubuntu-upgrade-linux-image-6-11-0-1011-oracle
  • ubuntu-upgrade-linux-image-6-11-0-1011-oracle-64k
  • ubuntu-upgrade-linux-image-6-11-0-1015-oem
  • ubuntu-upgrade-linux-image-6-11-0-18-generic
  • ubuntu-upgrade-linux-image-6-11-0-18-generic-64k
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-lts-22-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-cvm
  • ubuntu-upgrade-linux-image-azure-fde
  • ubuntu-upgrade-linux-image-azure-fde-lts-22-04
  • ubuntu-upgrade-linux-image-azure-lts-22-04
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-22-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-64k
  • ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-64k-hwe-24-04
  • ubuntu-upgrade-linux-image-generic-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-hwe-24-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-15
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-15
  • ubuntu-upgrade-linux-image-ibm
  • ubuntu-upgrade-linux-image-intel
  • ubuntu-upgrade-linux-image-intel-iotg
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-64k
  • ubuntu-upgrade-linux-image-lowlatency-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-nvidia
  • ubuntu-upgrade-linux-image-nvidia-lowlatency
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04b
  • ubuntu-upgrade-linux-image-oem-20-04c
  • ubuntu-upgrade-linux-image-oem-20-04d
  • ubuntu-upgrade-linux-image-oem-24-04
  • ubuntu-upgrade-linux-image-oem-24-04a
  • ubuntu-upgrade-linux-image-oem-24-04b
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-64k
  • ubuntu-upgrade-linux-image-oracle-lts-22-04
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-realtime
  • ubuntu-upgrade-linux-image-realtime-hwe-24-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04
  • ubuntu-upgrade-linux-image-virtual-hwe-24-04

References

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