CVE-2023-53569
published 2025-10-04CVE-2023-53569: In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount Check that log of block size stored in the…
PriorityP338high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.14%
4.1th percentile
In the Linux kernel, the following vulnerability has been resolved:
ext2: Check block size validity during mount
Check that log of block size stored in the superblock has sensible
value. Otherwise the shift computing the block size can overflow leading
to undefined behavior.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.37-1 (bookworm) | linux 6.1.37-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0ebfaf14150f55550cffb1148ed3920143c7a69c | 0ebfaf14150f55550cffb1148ed3920143c7a69c |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 451b98155be5dfee05bc6e7c8b30c0be4add3f71 | 451b98155be5dfee05bc6e7c8b30c0be4add3f71 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c4813f858e5c3e4c4659ce95385c1c400c593e1e | c4813f858e5c3e4c4659ce95385c1c400c593e1e |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 22ab5fed07ad4b206ea910fd0132d1a0d4831584 | 22ab5fed07ad4b206ea910fd0132d1a0d4831584 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 99f8a15af6c9f0653193104a9e70891f950c6001 | 99f8a15af6c9f0653193104a9e70891f950c6001 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e6f4fb28890c1361e0db9eb1adee3fc04e7fe7f5 | e6f4fb28890c1361e0db9eb1adee3fc04e7fe7f5 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c2e7776843a953fd7e48895c3880c277f996193e | c2e7776843a953fd7e48895c3880c277f996193e |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 62aeb94433fcec80241754b70d0d1836d5926b0a | 62aeb94433fcec80241754b70d0d1836d5926b0a |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.191-1 | 5.10.191-1 |
| linux | linux_kernel | >= 0 < 6.1.37-1 | 6.1.37-1 |
| linux | linux_kernel | >= 0 < 6.3.7-1 | 6.3.7-1 |
| linux | linux_kernel | >= 0 < 6.3.7-1 | 6.3.7-1 |
| linux | linux_kernel | >= 2.6.12.1 < 4.14.316 | 4.14.316 |
| linux | linux_kernel | >= 4.15 < 4.19.284 | 4.19.284 |
| linux | linux_kernel | >= 4.20 < 5.4.244 | 5.4.244 |
| linux | linux_kernel | >= 5.11 < 5.15.113 | 5.15.113 |
| linux | linux_kernel | >= 5.16 < 6.1.30 | 6.1.30 |
| linux | linux_kernel | >= 5.5 < 5.10.181 | 5.10.181 |
| linux | linux_kernel | >= 6.2 < 6.3.4 | 6.3.4 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-5576-c4r8-hvqj: In the Linux kernel, the following vulnerability has been resolved:
ext2: Check block size validity during mount
Check that log of block size stored
ghsa_unreviewed·2025-10-04
CVE-2023-53569 [HIGH] GHSA-5576-c4r8-hvqj: In the Linux kernel, the following vulnerability has been resolved:
ext2: Check block size validity during mount
Check that log of block size stored
In the Linux kernel, the following vulnerability has been resolved:
ext2: Check block size validity during mount
Check that log of block size stored in the superblock has sensible
value. Otherwise the shift computing the block size can overflow leading
to undefined behavior.
OSV
CVE-2023-53569: In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount Check that log of block size stored i
osv·2025-10-04·CVSS 7.8
CVE-2023-53569 [HIGH] CVE-2023-53569: In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount Check that log of block size stored i
In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount Check that log of block size stored in the superblock has sensible value. Otherwise the shift computing the block size can overflow leading to undefined behavior.
Red Hat
kernel: ext2: Check block size validity during mount
vendor_redhat·2025-10-04·CVSS 7.8
CVE-2023-53569 [HIGH] CWE-190 kernel: ext2: Check block size validity during mount
kernel: ext2: Check block size validity during mount
In the Linux kernel, the following vulnerability has been resolved:
ext2: Check block size validity during mount
Check that log of block size stored in the superblock has sensible
value. Otherwise the shift computing the block size can overflow leading
to undefined behavior.
An integer overflow vulnerability was found in the Linux kernel ext2 filesystem's block size validation during mount. A local user with privileges to mount filesystems can mount a crafted ext2 image with an excessively large log_block_size value in the superblock, causing the shift operation computing the actual block size to overflow and trigger undefined behavior, which results in denial of service through kernel crash or unpredictable system behavior.
Statement
Debian
CVE-2023-53569: linux - In the Linux kernel, the following vulnerability has been resolved: ext2: Check...
vendor_debian·2023·CVSS 7.8
CVE-2023-53569 [HIGH] CVE-2023-53569: linux - In the Linux kernel, the following vulnerability has been resolved: ext2: Check...
In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount Check that log of block size stored in the superblock has sensible value. Otherwise the shift computing the block size can overflow leading to undefined behavior.
Scope: local
bookworm: resolved (fixed in 6.1.37-1)
bullseye: resolved (fixed in 5.10.191-1)
forky: resolved (fixed in 6.3.7-1)
sid: resolved (fixed in 6.3.7-1)
trixie: resolved (fixed in 6.3.7-1)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/0ebfaf14150f55550cffb1148ed3920143c7a69chttps://git.kernel.org/stable/c/22ab5fed07ad4b206ea910fd0132d1a0d4831584https://git.kernel.org/stable/c/451b98155be5dfee05bc6e7c8b30c0be4add3f71https://git.kernel.org/stable/c/62aeb94433fcec80241754b70d0d1836d5926b0ahttps://git.kernel.org/stable/c/99f8a15af6c9f0653193104a9e70891f950c6001https://git.kernel.org/stable/c/c2e7776843a953fd7e48895c3880c277f996193ehttps://git.kernel.org/stable/c/c4813f858e5c3e4c4659ce95385c1c400c593e1ehttps://git.kernel.org/stable/c/e6f4fb28890c1361e0db9eb1adee3fc04e7fe7f5
2025-10-04
Published