In the Linux kernel, the following vulnerability has been resolved:
ext4: validate p_idx bounds in ext4_ext_correct_indexes
ext4_ext_correct_indexes() walks up the extent tree correcting
index entries when the first extent in a leaf is modified. Before
accessing path[k].p_idx->ei_block, there is no validation that
p_idx falls within the valid range of index entries for that
level.
If the on-disk extent header contains a corrupted or crafted
eh_entries value, p_idx can point past the end of the allocated
buffer, causing a slab-out-of-bounds read.
Fix this by validating path[k].p_idx against EXT_LAST_INDEX() at
both access sites: before the while loop and inside it. Return
-EFSCORRUPTED if the index pointer is out of range, consistent
with how other bounds violations are handled in the ext4 extent
tree code.
References
Configurations
Configuration 1 (hide)
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History
01 Jun 2026, 17:16
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| References |
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17 May 2026, 16:16
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07 May 2026, 18:38
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| First Time |
Linux linux Kernel
Linux |
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| CPE | cpe:2.3:o:linux:linux_kernel:2.6.19:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.19:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.19:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.19:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.19:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.19:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
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| CWE | CWE-125 | |
| References | () https://git.kernel.org/stable/c/01bf1e0b997d82c0e353b51ed74ef99698043c33 - Patch | |
| References | () https://git.kernel.org/stable/c/2acb5c12ebd860f30e4faf67e6cc8c44ddfe5fe8 - Patch | |
| References | () https://git.kernel.org/stable/c/407c944f217c17d4343148011acafebc604d55e1 - Patch | |
| References | () https://git.kernel.org/stable/c/93f2e975ed658ce09db4d4c2877ca2c06540df83 - Patch |
27 Apr 2026, 14:16
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
22 Apr 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-22 14:16
Updated : 2026-06-01 17:16
NVD link : CVE-2026-31449
Mitre link : CVE-2026-31449
CVE.ORG link : CVE-2026-31449
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read