Squashfs: check the inode number is not the invalid value of zero
Syskiller has produced an out of bounds access in fill_meta_index().
That out of bounds access is ultimately caused because the inode
has an inode number with the invalid value of zero, which was not checked.
The reason this causes the out of bounds access is due to following
sequence of events:
1. Fill_meta_index() is called to allocate (via empty_meta_index())
and fill a metadata index. It however suffers a data read error
and aborts, invalidating the newly returned empty metadata index.
It does this by setting the inode number of the index to zero,
which means unused (zero is not a valid inode number).
2. When fill_meta_index() is subsequently called again on another
read operation, locate_meta_index() returns the previous index
because it matches the inode number of 0. Because this index
has been returned it is expected to have been filled, and because
it hasn't been, an out of bounds access is performed.
This patch adds a sanity check which checks that the inode number
is not zero when the inode is created and returns -EINVAL if it is.
[phillip@squashfs.org.uk: whitespace fix]
Metrics
Affected Vendors & Products
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4178-1 | linux security update |
Debian DLA |
DLA-4193-1 | linux-6.1 security update |
Debian DSA |
DSA-5900-1 | linux security update |
Ubuntu USN |
USN-6893-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6893-2 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6893-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6918-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7510-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7510-2 | Linux kernel (FIPS) vulnerabilities |
Ubuntu USN |
USN-7510-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7510-4 | Linux kernel (Real-time) vulnerabilities |
Ubuntu USN |
USN-7510-5 | Linux kernel (Azure FIPS) vulnerabilities |
Ubuntu USN |
USN-7510-6 | Linux kernel (AWS FIPS) vulnerabilities |
Ubuntu USN |
USN-7510-7 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7510-8 | Linux kernel (AWS) vulnerabilities |
Ubuntu USN |
USN-7511-1 | Linux kernel (GCP) vulnerabilities |
Ubuntu USN |
USN-7511-2 | Linux kernel (GCP FIPS) vulnerabilities |
Ubuntu USN |
USN-7511-3 | Linux kernel (GKE) vulnerabilities |
Ubuntu USN |
USN-7512-1 | Linux kernel (GCP) vulnerabilities |
Ubuntu USN |
USN-7516-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7516-2 | Linux kernel (GCP FIPS) vulnerabilities |
Ubuntu USN |
USN-7516-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7516-4 | Linux kernel (Oracle) vulnerabilities |
Ubuntu USN |
USN-7516-5 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-7516-6 | Linux kernel (IBM) vulnerabilities |
Ubuntu USN |
USN-7516-7 | Linux kernel (AWS) vulnerabilities |
Ubuntu USN |
USN-7516-8 | Linux kernel (FIPS) vulnerabilities |
Ubuntu USN |
USN-7516-9 | Linux kernel (AWS) vulnerabilities |
Ubuntu USN |
USN-7517-1 | Linux kernel (Xilinx ZynqMP) vulnerabilities |
Ubuntu USN |
USN-7517-2 | Linux kernel (IBM) vulnerabilities |
Ubuntu USN |
USN-7517-3 | Linux kernel (BlueField) vulnerabilities |
Ubuntu USN |
USN-7518-1 | Linux kernel (Azure FIPS) vulnerabilities |
Ubuntu USN |
USN-7539-1 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-7540-1 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-7593-1 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-7602-1 | Linux kernel (Xilinx ZynqMP) vulnerabilities |
Ubuntu USN |
USN-7640-1 | Linux kernel (IoT) vulnerabilities |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Tue, 04 Nov 2025 18:30:00 +0000
Mon, 03 Nov 2025 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Wed, 16 Jul 2025 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
epss
|
epss
|
Wed, 16 Apr 2025 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: Squashfs: check the inode number is not the invalid value of zero Syskiller has produced an out of bounds access in fill_meta_index(). That out of bounds access is ultimately caused because the inode has an inode number with the invalid value of zero, which was not checked. The reason this causes the out of bounds access is due to following sequence of events: 1. Fill_meta_index() is called to allocate (via empty_meta_index()) and fill a metadata index. It however suffers a data read error and aborts, invalidating the newly returned empty metadata index. It does this by setting the inode number of the index to zero, which means unused (zero is not a valid inode number). 2. When fill_meta_index() is subsequently called again on another read operation, locate_meta_index() returns the previous index because it matches the inode number of 0. Because this index has been returned it is expected to have been filled, and because it hasn't been, an out of bounds access is performed. This patch adds a sanity check which checks that the inode number is not zero when the inode is created and returns -EINVAL if it is. [phillip@squashfs.org.uk: whitespace fix] Link: https://lkml.kernel.org/r/20240409204723.446925-1-phillip@squashfs.org.uk | In the Linux kernel, the following vulnerability has been resolved: Squashfs: check the inode number is not the invalid value of zero Syskiller has produced an out of bounds access in fill_meta_index(). That out of bounds access is ultimately caused because the inode has an inode number with the invalid value of zero, which was not checked. The reason this causes the out of bounds access is due to following sequence of events: 1. Fill_meta_index() is called to allocate (via empty_meta_index()) and fill a metadata index. It however suffers a data read error and aborts, invalidating the newly returned empty metadata index. It does this by setting the inode number of the index to zero, which means unused (zero is not a valid inode number). 2. When fill_meta_index() is subsequently called again on another read operation, locate_meta_index() returns the previous index because it matches the inode number of 0. Because this index has been returned it is expected to have been filled, and because it hasn't been, an out of bounds access is performed. This patch adds a sanity check which checks that the inode number is not zero when the inode is created and returns -EINVAL if it is. [phillip@squashfs.org.uk: whitespace fix] |
Thu, 13 Mar 2025 12:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Fri, 07 Mar 2025 18:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:* |
|
| Vendors & Products |
Linux
Linux linux Kernel |
|
| Metrics |
cvssV3_1
|
cvssV3_1
|
Fri, 07 Mar 2025 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Sat, 23 Nov 2024 02:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-125 |
Wed, 11 Sep 2024 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 06 Sep 2024 14:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat rhel Aus
Redhat rhel E4s Redhat rhel Tus |
|
| CPEs | cpe:/o:redhat:rhel_aus:8.6 cpe:/o:redhat:rhel_e4s:8.6 cpe:/o:redhat:rhel_tus:8.6 |
|
| Vendors & Products |
Redhat rhel Aus
Redhat rhel E4s Redhat rhel Tus |
Tue, 13 Aug 2024 23:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/o:redhat:rhel_eus:8.8 |
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-11-04T17:15:00.359Z
Reserved: 2024-02-19T14:20:24.204Z
Link: CVE-2024-26982
Updated: 2025-11-04T17:15:00.359Z
Status : Modified
Published: 2024-05-01T06:15:15.610
Modified: 2025-11-04T18:15:58.847
Link: CVE-2024-26982
OpenCVE Enrichment
No data.
Debian DLA
Debian DSA
Ubuntu USN