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Fix CVE-2025-2926 #5841

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b36c123
Fix CVE-2025-2926
bmribler Sep 16, 2025
a717eb1
Moved the detection of invalid image len to where the value is obtained.
bmribler Sep 25, 2025
7cc1f4e
Merge branch 'develop' into fix_CVE-2025-2926
bmribler Sep 25, 2025
05369d0
Committing clang-format changes
github-actions[bot] Sep 25, 2025
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6 changes: 6 additions & 0 deletions release_docs/CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -493,6 +493,12 @@ Simple example programs showing how to use complex number datatypes have been ad

## Library

### Fixed security issue CVE-2025-2926

An image size was corrupted and decoded as 0 resulting in a NULL image buffer, which caused a NULL pointer dereference when the image was being copied to the buffer. This has been fixed with additional image size check.

Fixes GitHub issue #5384

### Fixed a problem with the scale-offset filter

A security fix added to 1.14.6 introduced a regression where certain data values could trigger a library error (not a crash or segfault).
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10 changes: 7 additions & 3 deletions src/H5Ocache.c
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Expand Up @@ -595,18 +595,22 @@ H5O__cache_free_icr(void *_thing)
static herr_t
H5O__cache_chk_get_initial_load_size(void *_udata, size_t *image_len)
{
const H5O_chk_cache_ud_t *udata = (const H5O_chk_cache_ud_t *)_udata; /* User data for callback */
const H5O_chk_cache_ud_t *udata = (const H5O_chk_cache_ud_t *)_udata; /* User data for callback */
herr_t ret_value = SUCCEED;

FUNC_ENTER_PACKAGE_NOERR
FUNC_ENTER_PACKAGE

assert(udata);
assert(udata->oh);
assert(image_len);

/* Set the image length size */
if (udata->size == 0)
HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, FAIL, "invalid size of image");
*image_len = udata->size;

FUNC_LEAVE_NOAPI(SUCCEED)
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__cache_chk_get_initial_load_size() */

/*-------------------------------------------------------------------------
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