Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
Unknown
Privileges Required
Unknown
Attack Vector
Unknown
0

CVE-2024-26848

Disclosure Date: April 17, 2024 •
CVE-2024-26848
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

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

afs: Fix endless loop in directory parsing

If a directory has a block with only “.afsXXXX” files in it (from
uncompleted silly-rename), these .afsXXXX files are skipped but without
advancing the file position in the dir_context. This leads to
afs_dir_iterate() repeating the block again and again.

Fix this by making the code that skips the .__afsXXXX file also manually
advance the file position.

The symptoms are a soft lookup:

    watchdog: BUG: soft lockup - CPU#3 stuck for 52s! [check:5737]
    ...
    RIP: 0010:afs_dir_iterate_block+0x39/0x1fd
    ...
     ? watchdog_timer_fn+0x1a6/0x213
    ...
     ? asm_sysvec_apic_timer_interrupt+0x16/0x20
     ? afs_dir_iterate_block+0x39/0x1fd
     afs_dir_iterate+0x10a/0x148
     afs_readdir+0x30/0x4a
     iterate_dir+0x93/0xd3
     __do_sys_getdents64+0x6b/0xd4

This is almost certainly the actual fix for:

    https://bugzilla.kernel.org/show_bug.cgi?id=218496

Add Assessment

No one has assessed this topic. Be the first to add your voice to the community.

CVSS V3 Severity and Metrics
Base Score:
None
Impact Score:
Unknown
Exploitability Score:
Unknown
Vector:
Unknown
Attack Vector (AV):
Unknown
Attack Complexity (AC):
Unknown
Privileges Required (PR):
Unknown
User Interaction (UI):
Unknown
Scope (S):
Unknown
Confidentiality (C):
Unknown
Integrity (I):
Unknown
Availability (A):
Unknown

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Linux 5c78be006ed9
Linux 96370ba395c5
Linux 80b15346492b
Linux 058ed71e0f7a
Linux f67898867b6b
Linux fe02316e4933
Linux 5f7a07646655
Linux not down converted
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • Linux

Products

  • Linux
Technical Analysis