CVE-2026-31449
Essential information
- Published
- 22/04/2026 14:16
- Modified
- 23/04/2026 16:17
- Author
- —
- Creator
- —
- CVSS
- 7.8 HIGH (v3.1)
- CISA KEV
- No
- CWE
- CWE-125
- CVSS vector
-
—
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H—
CVSS metrics
- Access vector
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- Access complexity
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- Authentication
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- Confidentiality impact
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- Integrity impact
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- Availability impact
- —
- Exploitability
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- Remediation level
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- Report confidence
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- Temporal score
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- Attack vector
- LOCAL
- Attack complexity
- LOW
- Privileges required
- NONE
- User interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality impact
- HIGH
- Integrity impact
- HIGH
- Availability impact
- HIGH
- Exploit code maturity
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
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- Attack complexity
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- Attack requirements
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- Privileges required
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- User interaction
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- Confidentiality (V)
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- Confidentiality (S)
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- Integrity (V)
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- Integrity (S)
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- Availability (V)
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- Availability (S)
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- Exploit maturity
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Description
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.
NVD status
- Status
- Modified — CVE has been recently published to the CVE List and has been received by the NVD.
- Source
- nist-nvd-api
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:2.6.19:-:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:2.6.19:rc2:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:2.6.19:rc3:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:2.6.19:rc4:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:2.6.19:rc5:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:2.6.19:rc6:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* |
| linux / linux kernel | cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* |