CVE-2026-43365
published 2026-05-08CVE-2026-43365: In the Linux kernel, the following vulnerability has been resolved: xfs: fix undersized l_iclog_roundoff values If the superblock doesn't list a log stripe…
PriorityP341high8.2CVSS 3.1
AVNACLPRNUINSUCNILAH
EPSS
0.41%
33.9th percentile
In the Linux kernel, the following vulnerability has been resolved:
xfs: fix undersized l_iclog_roundoff values
If the superblock doesn't list a log stripe unit, we set the incore log
roundoff value to 512. This leads to corrupt logs and unmountable
filesystems in generic/617 on a disk with 4k physical sectors...
XFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c
XFS (sda1): Torn write (CRC failure) detected at log block 0x318e. Truncating head block from 0x3197.
XFS (sda1): failed to locate log tail
XFS (sda1): log mount/recovery failed: error -74
XFS (sda1): log mount failed
XFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c
XFS (sda1): Ending clean mount
...on the current xfsprogs for-next which has a broken mkfs. xfs_info
shows this...
meta-data=/dev/sda1 isize=512 agcount=4, agsize=644992 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=1
= reflink=1 bigtime=1 inobtcount=1 nrext64=1
= exchange=1 metadir=1
data = bsize=4096 blocks=2579968, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1, parent=1
log =internal log bsize=4096 blocks=16384, version=2
= sectsz=4096 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
= rgcount=0 rgsize=268435456 extents
= zoned=0 start=0 reserved=0
...observe that the log section has sectsz=4096 sunit=0, which means
that the roundoff factor is 512, not 4096 as you'd expect. We should
fix mkfs not to generate broken filesystems, but anyone can fuzz the
ondisk superblock so we should be more cautious. I think the inadequate
logic predates commit a6a65fef5ef8d0, but that's clearly going to
require a different backport.
Affected
44 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48 < 5afae524f83d6a18517298491a5624cb0eae5029 | 5afae524f83d6a18517298491a5624cb0eae5029 |
| linux | linux | >= a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48 < 2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40 | 2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40 |
| linux | linux | >= a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48 < 41e91dff2d3974730b5ee50daa8e27ec254cbf91 | 41e91dff2d3974730b5ee50daa8e27ec254cbf91 |
| linux | linux | >= a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48 < e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d | e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d |
| linux | linux | >= a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48 < 446a1f5bb64ba38adb93cb043ff0f7b85e8937ca | 446a1f5bb64ba38adb93cb043ff0f7b85e8937ca |
| linux | linux | >= a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48 < 5e7148402dfc4a5b7894d8e97b15e5c2e70924aa | 5e7148402dfc4a5b7894d8e97b15e5c2e70924aa |
| linux | linux | >= a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48 < 52a8a1ba883defbfe3200baa22cf4cd21985d51a | 52a8a1ba883defbfe3200baa22cf4cd21985d51a |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 5.14 < 5.15.203 | 5.15.203 |
| linux | linux_kernel | >= 5.16 < 6.1.167 | 6.1.167 |
| linux | linux_kernel | >= 6.13 < 6.18.19 | 6.18.19 |
| linux | linux_kernel | >= 6.19 < 6.19.9 | 6.19.9 |
| linux | linux_kernel | >= 6.2 < 6.6.130 | 6.6.130 |
| linux | linux_kernel | >= 6.7 < 6.12.78 | 6.12.78 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-aws-5.15 | — | — |
| ubuntu | linux-aws-fips | — | — |
| ubuntu | linux-fips | — | — |
| ubuntu | linux-gcp | — | — |
| ubuntu | linux-gcp-6.8 | — | — |
| ubuntu | linux-gcp-fips | — | — |
| ubuntu | linux-gke | — | — |
CVSS provenance
nvdv3.18.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
vendor_ubuntu7.1HIGH
vendor_redhat7.0MEDIUM
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It was discovered that some AMD processors did not properly clear data in
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It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
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It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A lo
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Linux kernel did not properly validate file name length in certain
situations, leading to an out-of-bounds read. An attacker could use this to
construct a malicious NTFS image that, when mounted and operated on, could
expose sensitive information (kernel memory). (CVE-2023-45896)
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local
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Maxim Suhanov discovered that the NTFS file system implementation in the
Linux kernel did not properly validate file name length in certain
situations, leading to an out-of-bounds read. An attacker could use this to
construct a malicious NTFS image that, when mounted and operated on, could
expose sensitive information (kernel memory). (CVE-2023-45896)
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation
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CVE-2026-46073 [LOW] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacke
Red Hat
kernel: xfs: fix undersized l_iclog_roundoff values
vendor_redhat·2026-05-08·CVSS 7.0
CVE-2026-43365 [MEDIUM] CWE-166 kernel: xfs: fix undersized l_iclog_roundoff values
kernel: xfs: fix undersized l_iclog_roundoff values
A flaw was found in the Linux kernel's XFS filesystem. This vulnerability arises when the filesystem superblock, which contains critical metadata, does not correctly specify a log stripe unit. This can lead to undersized log roundoff values, causing log corruption. A local attacker could potentially exploit this by manipulating the on-disk superblock, resulting in unmountable filesystems and a Denial of Service (DoS).
Package: kernel (Red Hat Enterprise Linux 10) - Affected
Package: kernel (Red Hat Enterprise Linux 6) - Out of support scope
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Affected
Package: kernel
GHSA
GHSA-gf37-6wm7-r3cm: In the Linux kernel, the following vulnerability has been resolved:
xfs: fix undersized l_iclog_roundoff values
If the superblock doesn't list a log
ghsa_unreviewed·2026-05-08
CVE-2026-43365 GHSA-gf37-6wm7-r3cm: In the Linux kernel, the following vulnerability has been resolved:
xfs: fix undersized l_iclog_roundoff values
If the superblock doesn't list a log
In the Linux kernel, the following vulnerability has been resolved:
xfs: fix undersized l_iclog_roundoff values
If the superblock doesn't list a log stripe unit, we set the incore log
roundoff value to 512. This leads to corrupt logs and unmountable
filesystems in generic/617 on a disk with 4k physical sectors...
XFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c
XFS (sda1): Torn write (CRC failure) detected at log block 0x318e. Truncating head block from 0x3197.
XFS (sda1): failed to locate log tail
XFS (sda1): log mount/recovery failed: error -74
XFS (sda1): log mount failed
XFS (sda1): Mounting V5 Filesystem ff3121ca-26e6-4b77-b742-aaff9a449e1c
XFS (sda1): Ending clean mount
...on the current xfsprogs for-next which has a broken mkfs. xfs_info
shows this...
met
VulDB
Linux Kernel up to 6.19.8 xfs privilege escalation
vuldb·2026-05-08
CVE-2026-43365 [CRITICAL] Linux Kernel up to 6.19.8 xfs privilege escalation
A vulnerability labeled as critical has been found in Linux Kernel up to 6.19.8. Affected by this vulnerability is an unknown functionality of the component xfs. The manipulation results in privilege escalation.
This vulnerability is cataloged as CVE-2026-43365. The attack must originate from the local network. There is no exploit available.
The affected component should be upgraded.
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40https://git.kernel.org/stable/c/41e91dff2d3974730b5ee50daa8e27ec254cbf91https://git.kernel.org/stable/c/446a1f5bb64ba38adb93cb043ff0f7b85e8937cahttps://git.kernel.org/stable/c/52a8a1ba883defbfe3200baa22cf4cd21985d51ahttps://git.kernel.org/stable/c/5afae524f83d6a18517298491a5624cb0eae5029https://git.kernel.org/stable/c/5e7148402dfc4a5b7894d8e97b15e5c2e70924aahttps://git.kernel.org/stable/c/e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d
2026-05-08
Published