Vulnerability in Linux kernel (CVE-2022-50009)
Summary
Vulnerability in Linux kernel (CVE-2022-50009). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data
There is issue as follows when test f2fs atomic write:
F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
F2FS-fs (loop0): invalid crc_offset: 0
F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix.
F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix.
BUG: KASAN: null-ptr-deref in f2fs_get_dnode_of_data+0xac/0x16d0
Read of size 8 at addr 0000000000000028 by task rep/1990
CPU: 4 PID: 1990 Comm: rep Not tainted 5.19.0-rc6-next-20220715 #266
Call Trace:
dump_stack_lvl+0x6e/0x91
print_report.cold+0x49a/0x6bb
kasan_report+0xa8/0x130
f2fs_get_dnode_of_data+0xac/0x16d0
f2fs_do_write_data_page+0x2a5/0x1030
move_data_page+0x3c5/0xdf0
do_garbage_collect+0x2015/0x36c0
f2fs_gc+0x554/0x1d30
f2fs_balance_fs+0x7f5/0xda0
f2fs_write_single_data_page+0xb66/0xdc0
f2fs_write_cache_pages+0x716/0x1420
f2fs_write_data_pages+0x84f/0x9a0
do_writepages+0x130/0x3a0
filemap_fdatawrite_wbc+0x87/0xa0
file_write_and_wait_range+0x157/0x1c0
f2fs_do_sync_file+0x206/0x12d0
f2fs_sync_file+0x99/0xc0
vfs_fsync_range+0x75/0x140
f2fs_file_write_iter+0xd7b/0x1850
vfs_write+0x645/0x780
ksys_write+0xf1/0x1e0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
As 3db1de0e582c commit changed atomic write way which new a cow_inode for
a…
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2022-50009 has been found in Linux kernel.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2022-50009" on the vendor's site.
CVE-2022-50009 (Linux kernel) — CWE-476 / CVSS v3 5.5
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-476) exists in Linux kernel.
Check the vendor advisory for the affected versions of Linux kernel.
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2022-50009 linux
- Ubuntu UBUNTU-CVE-2022-50009 linux
References
- advisory github.com
- advisory nvd.nist.gov
- package git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org