CVE-2026-46094
published 2026-05-27CVE-2026-46094: 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…
medium5.5
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,
ensuring there is always enough space for the IS_LAST_ENTRY() read
on the subsequent iteration.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < ab6da97bc310db35d4e4ef5354bc3ff626b0698c | ab6da97bc310db35d4e4ef5354bc3ff626b0698c |
| linux | linux | >= 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < 5a5314d2387633a272a04d1bd8727f99058e4e68 | 5a5314d2387633a272a04d1bd8727f99058e4e68 |
| linux | linux | >= 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < 537e065977022aa22f2c2503e8accaf16622e0fd | 537e065977022aa22f2c2503e8accaf16622e0fd |
| linux | linux | >= 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < 520986722dbf869c122252123fc161c7302eab7d | 520986722dbf869c122252123fc161c7302eab7d |
| linux | linux | >= 3478c83cf26bbffd026ae6a56bcb1fe544f0834e < eceafc31ea7b42c984ece10d79d505c0bb6615d5 | eceafc31ea7b42c984ece10d79d505c0bb6615d5 |
| linux | linux_kernel | — | — |