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Ubuntu: (Multiple Advisories) (CVE-2024-35895): Linux kernel vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2024-35895): Linux kernel vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/19/2024
Created
07/12/2024
Added
07/12/2024
Modified
07/17/2024

Description

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Prevent lock inversion deadlock in map delete elem syzkaller started using corpuses where a BPF tracing program deletes elements from a sockmap/sockhash map. Because BPF tracing programs can be invoked from any interrupt context, locks taken during a map_delete_elem operation must be hardirq-safe. Otherwise a deadlock due to lock inversion is possible, as reported by lockdep: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&host->lock); lock(&htab->buckets[i].lock); <Interrupt> lock(&host->lock); Locks in sockmap are hardirq-unsafe by design. We expects elements to be deleted from sockmap/sockhash only in task (normal) context with interrupts enabled, or in softirq context. Detect when map_delete_elem operation is invoked from a context which is _not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an error. Note that map updates are not affected by this issue. BPF verifier does not allow updating sockmap/sockhash from a BPF tracing program today.

Solution(s)

  • ubuntu-upgrade-linux-image-5-15-0-1048-gkeop
  • ubuntu-upgrade-linux-image-5-15-0-1058-ibm
  • ubuntu-upgrade-linux-image-5-15-0-1060-intel-iotg
  • ubuntu-upgrade-linux-image-5-15-0-1060-nvidia
  • ubuntu-upgrade-linux-image-5-15-0-1060-nvidia-lowlatency
  • ubuntu-upgrade-linux-image-5-15-0-1062-gke
  • ubuntu-upgrade-linux-image-5-15-0-1062-kvm
  • ubuntu-upgrade-linux-image-5-15-0-1063-oracle
  • ubuntu-upgrade-linux-image-5-15-0-1064-gcp
  • ubuntu-upgrade-linux-image-5-15-0-1068-azure
  • ubuntu-upgrade-linux-image-5-15-0-116-generic
  • ubuntu-upgrade-linux-image-5-15-0-116-generic-64k
  • ubuntu-upgrade-linux-image-5-15-0-116-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-1075-ibm
  • ubuntu-upgrade-linux-image-5-4-0-1088-bluefield
  • ubuntu-upgrade-linux-image-5-4-0-1095-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1116-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1127-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1132-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1133-azure
  • ubuntu-upgrade-linux-image-5-4-0-189-generic
  • ubuntu-upgrade-linux-image-5-4-0-189-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-189-lowlatency
  • ubuntu-upgrade-linux-image-6-8-0-1006-gke
  • ubuntu-upgrade-linux-image-6-8-0-1007-intel
  • ubuntu-upgrade-linux-image-6-8-0-1007-raspi
  • ubuntu-upgrade-linux-image-6-8-0-1008-ibm
  • ubuntu-upgrade-linux-image-6-8-0-1008-oem
  • ubuntu-upgrade-linux-image-6-8-0-1009-nvidia
  • ubuntu-upgrade-linux-image-6-8-0-1009-nvidia-64k
  • ubuntu-upgrade-linux-image-6-8-0-1010-azure
  • ubuntu-upgrade-linux-image-6-8-0-1010-azure-fde
  • ubuntu-upgrade-linux-image-6-8-0-1010-gcp
  • ubuntu-upgrade-linux-image-6-8-0-38-generic
  • ubuntu-upgrade-linux-image-6-8-0-38-generic-64k
  • ubuntu-upgrade-linux-image-6-8-0-38-lowlatency
  • ubuntu-upgrade-linux-image-6-8-0-38-lowlatency-64k
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-cvm
  • ubuntu-upgrade-linux-image-azure-fde
  • ubuntu-upgrade-linux-image-azure-lts-20-04
  • ubuntu-upgrade-linux-image-azure-lts-22-04
  • ubuntu-upgrade-linux-image-bluefield
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-20-04
  • 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-24-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-hwe-24-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • 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-gkeop-5-4
  • ubuntu-upgrade-linux-image-ibm
  • ubuntu-upgrade-linux-image-ibm-classic
  • ubuntu-upgrade-linux-image-ibm-lts-20-04
  • ubuntu-upgrade-linux-image-ibm-lts-24-04
  • ubuntu-upgrade-linux-image-intel
  • ubuntu-upgrade-linux-image-intel-iotg
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-64k
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-nvidia
  • ubuntu-upgrade-linux-image-nvidia-64k
  • ubuntu-upgrade-linux-image-nvidia-lowlatency
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-24-04
  • ubuntu-upgrade-linux-image-oem-24-04a
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-22-04
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual-hwe-24-04

References

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