Bug 2265836 (CVE-2024-26601) - CVE-2024-26601 kernel: ext4: regenerate buddy after block freeing failed if under fc replay
Summary: CVE-2024-26601 kernel: ext4: regenerate buddy after block freeing failed if u...
Keywords:
Status: NEW
Alias: CVE-2024-26601
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2265837
Blocks: 2267044
TreeView+ depends on / blocked
 
Reported: 2024-02-24 17:51 UTC by Mauro Matteo Cascella
Modified: 2024-03-04 17:12 UTC (History)
49 users (show)

Fixed In Version: kernel 6.8-rc3
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Description Mauro Matteo Cascella 2024-02-24 17:51:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: regenerate buddy after block freeing failed if under fc replay

The Linux kernel CVE team has assigned CVE-2024-26601 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022411-CVE-2024-26601-b6ac@gregkh/T/#u
Comment 1 Mauro Matteo Cascella 2024-02-24 17:52:46 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2265837]
Comment 2 Eric Sandeen 2024-02-24 21:17:26 UTC 
Just a note - although there is no reproducer provided, the claimed problematic commit 6bd97bf273bd is in upstream in v5.11. The fix landed in v6.8.

The problematic commit does not appear to have been backported to RHEL8.
It is present in RHEL9, though.

(It's not clear to me how this bug is a security flaw.)
Comment 4 Justin M. Forbes 2024-02-26 23:48:41 UTC 
This was fixed for Fedora with the 6.7.5 stable kernel updates.
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