CVE-2025-21646— afs: Fix the maximum cell name length
Affected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c3e9f888263bb4df11cbd623ceced02081cb2f9f< 9340385468d056bb700b8f28df236b81fc86a079 | affected |
c3e9f888263bb4df11cbd623ceced02081cb2f9f< 7cb3e77e9b4e6ffa325a5559393d3283c9af3d01 | affected | ||
c3e9f888263bb4df11cbd623ceced02081cb2f9f< aabe47cf5ac5e1db2ae0635f189d836f67024904 | affected | ||
c3e9f888263bb4df11cbd623ceced02081cb2f9f< 7673030efe0f8ca1056d3849d61784c6caa052af | affected | ||
c3e9f888263bb4df11cbd623ceced02081cb2f9f< 7922b1f058fe24a93730511dd0ae2e1630920096 | affected | ||
c3e9f888263bb4df11cbd623ceced02081cb2f9f< 8fd56ad6e7c90ac2bddb0741c6b248c8c5d56ac8 | affected | ||
5.8 | affected | ||
< 5.8 | unaffected | ||
| … +6 more rows | |||
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I. Basic Information for CVE-2025-21646
Vulnerability Information
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Vulnerability Title
afs: Fix the maximum cell name length
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: afs: Fix the maximum cell name length The kafs filesystem limits the maximum length of a cell to 256 bytes, but a problem occurs if someone actually does that: kafs tries to create a directory under /proc/net/afs/ with the name of the cell, but that fails with a warning: WARNING: CPU: 0 PID: 9 at fs/proc/generic.c:405 because procfs limits the maximum filename length to 255. However, the DNS limits the maximum lookup length and, by extension, the maximum cell name, to 255 less two (length count and trailing NUL). Fix this by limiting the maximum acceptable cellname length to 253. This also allows us to be sure we can create the "/afs/.<cell>/" mountpoint too. Further, split the YFS VL record cell name maximum to be the 256 allowed by the protocol and ignore the record retrieved by YFSVL.GetCellName if it exceeds 253.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于最大单元名称长度设置不当。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-21646
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Patches & Fixes for CVE-2025-21646 (6)
Same Patch Batch · Linux · 2025-01-19 · 47 CVEs total
| CVE-2024-57916 | misc: microchip: pci1xxxx: Resolve kernel panic during GPIO IRQ handling | |
| CVE-2024-57918 | drm/amd/display: fix page fault due to max surface definition mismatch | |
| CVE-2024-57921 | drm/amdgpu: Add a lock when accessing the buddy trim function | |
| CVE-2024-57925 | ksmbd: fix a missing return value check bug | |
| CVE-2024-57926 | drm/mediatek: Set private->all_drm_private[i]->drm to NULL if mtk_drm_bind returns err | |
| CVE-2024-57928 | netfs: Fix enomem handling in buffered reads | |
| CVE-2024-57927 | nfs: Fix oops in nfs_netfs_init_request() when copying to cache | |
| CVE-2024-57929 | dm array: fix releasing a faulty array block twice in dm_array_cursor_end | |
| CVE-2024-57923 | btrfs: zlib: fix avail_in bytes for s390 zlib HW compression path | |
| CVE-2024-57917 | topology: Keep the cpumask unchanged when printing cpumap | |
| CVE-2024-57919 | drm/amd/display: fix divide error in DM plane scale calcs | |
| CVE-2024-57914 | usb: typec: tcpci: fix NULL pointer issue on shared irq case | |
| CVE-2024-57913 | usb: gadget: f_fs: Remove WARN_ON in functionfs_bind | |
| CVE-2024-57912 | iio: pressure: zpa2326: fix information leak in triggered buffer | |
| CVE-2024-57911 | iio: dummy: iio_simply_dummy_buffer: fix information leak in triggered buffer | |
| CVE-2024-57910 | iio: light: vcnl4035: fix information leak in triggered buffer | |
| CVE-2024-57908 | iio: imu: kmx61: fix information leak in triggered buffer | |
| CVE-2024-57909 | iio: light: bh1745: fix information leak in triggered buffer | |
| CVE-2024-57907 | iio: adc: rockchip_saradc: fix information leak in triggered buffer | |
| CVE-2024-57905 | iio: adc: ti-ads1119: fix information leak in triggered buffer |
Showing top 20 of 47 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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