🛡️ AZL-53846 — kernel

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2022-48635 affecting package kernel for versions less than 6.6.76.1-1

In the Linux kernel, the following vulnerability has been resolved:

fsdax: Fix infinite loop in dax_iomap_rw()

I got an infinite loop and a WARNING report when executing a tail command

in virtiofs.

WARNING: CPU: 10 PID: 964 at fs/iomap/iter.c:34 iomap_iter+0x3a2/0x3d0

Modules linked in:

CPU: 10 PID: 964 Comm: tail Not tainted 5.19.0-rc7

Call Trace:

<TASK>

dax_iomap_rw+0xea/0x620

? __this_cpu_preempt_check+0x13/0x20

fuse_dax_read_iter+0x47/0x80

fuse_file_read_iter+0xae/0xd0

new_sync_read+0xfe/0x180

? 0xffffffff81000000

vfs_read+0x14d/0x1a0

ksys_read+0x6d/0xf0

__x64_sys_read+0x1a/0x20

do_syscall_64+0x3b/0x90

entry_SYSCALL_64_after_hwframe+0x63/0xcd

The tail command will call read() with a count of 0. In this case,

iomap_iter() will report this WARNING, and always return 1 which casuing

the infinite loop in dax_iomap_rw().

Fixing by checking count whether is 0 in dax_iomap_rw().

Affected software

AZL-53846 is recorded against 1 package.

  • kernel (fixed in 6.6.76.1-1)

Timeline and source

Published on 28 April 2024 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2024-04-28
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — 6.6.76.1-1

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