Bug 2309797 (CVE-2024-44966) - CVE-2024-44966 kernel: binfmt_flat: Fix corruption when not offsetting data start
Summary: CVE-2024-44966 kernel: binfmt_flat: Fix corruption when not offsetting data s...
Keywords:
Status: NEW
Alias: CVE-2024-44966
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2309827
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-09-04 19:21 UTC by OSIDB Bzimport
Modified: 2024-09-04 21:11 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Last Closed:
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Description OSIDB Bzimport 2024-09-04 19:21:15 UTC
In the Linux kernel, the following vulnerability has been resolved:

binfmt_flat: Fix corruption when not offsetting data start

Commit 04d82a6d0881 ("binfmt_flat: allow not offsetting data start")
introduced a RISC-V specific variant of the FLAT format which does
not allocate any space for the (obsolete) array of shared library
pointers. However, it did not disable the code which initializes the
array, resulting in the corruption of sizeof(long) bytes before the DATA
segment, generally the end of the TEXT segment.

Introduce MAX_SHARED_LIBS_UPDATE which depends on the state of
CONFIG_BINFMT_FLAT_NO_DATA_START_OFFSET to guard the initialization of
the shared library pointer region so that it will only be initialized
if space is reserved for it.


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