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Debian: CVE-2024-26878: linux -- security update

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Debian: CVE-2024-26878: linux -- security update

Severity
4
CVSS
(AV:L/AC:M/Au:S/C:N/I:N/A:C)
Published
04/17/2024
Created
05/08/2024
Added
05/08/2024
Modified
01/30/2025

Description

In the Linux kernel, the following vulnerability has been resolved: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered. So let's fix it by using a temporary pointer to avoid this issue.

Solution(s)

  • debian-upgrade-linux

References

  • https://attackerkb.com/topics/cve-2024-26878
  • CVE - 2024-26878
  • DSA-5681-1
  • 查看数 697
  • 已创建
  • 最后回复

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