CVE-2026-46094
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
39/100
Published: 2026-05-27
Modified: 2026-11-06
First seen: 2026-11-06
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
None
A:
High
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix bounds check in check_xattrs() to prevent out-of-bounds access The bounds check for the next xattr entry in check_xattrs() uses (void *)next >= end, which allows next to point within sizeof(u32) bytes of end. On the next loop iteration, IS_LAST_ENTRY() reads 4 bytes via *(__u32 *)(entry), which can overrun the valid xattr region. For example, if next lands at end - 1, the check passes since next < end, but IS_LAST_ENTRY() reads 4 bytes starting at end - 1, accessing 3 bytes beyond the valid region. Fix this by changing the check to (void *)next + sizeof(u32) > end, ensuring there is always enough space for the IS_LAST_ENTRY() read on the subsequent iteration.
Weakness Classification (1)
Affected Software (7)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < ab6da97bc310db35d4e4ef5354bc3ff626b0698c |
| Linux | Linux | 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < 5a5314d2387633a272a04d1bd8727f99058e4e68 |
| Linux | Linux | 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < 537e065977022aa22f2c2503e8accaf16622e0fd |
| Linux | Linux | 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < 520986722dbf869c122252123fc161c7302eab7d |
| Linux | Linux | 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < eceafc31ea7b42c984ece10d79d505c0bb6615d5 |
| Linux | Linux | 6.3 |
| linux | linux_kernel | 6.3 – 6.6.140 |