5.5

CVE-2024-42254

io_uring: fix error pbuf checking

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

io_uring: fix error pbuf checking

Syz reports a problem, which boils down to NULL vs IS_ERR inconsistent
error handling in io_alloc_pbuf_ring().

KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
RIP: 0010:__io_remove_buffers+0xac/0x700 io_uring/kbuf.c:341
Call Trace:
 <TASK>
 io_put_bl io_uring/kbuf.c:378 [inline]
 io_destroy_buffers+0x14e/0x490 io_uring/kbuf.c:392
 io_ring_ctx_free+0xa00/0x1070 io_uring/io_uring.c:2613
 io_ring_exit_work+0x80f/0x8a0 io_uring/io_uring.c:2844
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version 6.10 Update -
Linux ≫ Linux Kernel Version 6.10 Update rc1
Linux ≫ Linux Kernel Version 6.10 Update rc2
Linux ≫ Linux Kernel Version 6.10 Update rc3
Linux ≫ Linux Kernel Version 6.10 Update rc4
Linux ≫ Linux Kernel Version 6.10 Update rc5
Linux ≫ Linux Kernel Version 6.10 Update rc6
Linux ≫ Linux Kernel Version 6.10 Update rc7
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.11
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/68d19af95a353f5e2b021602180b65b303eba99d
Patch
https://git.kernel.org/stable/c/bcc87d978b834c298bbdd9c52454c5d0a946e97e
Patch
https://git.kernel.org/stable/c/78aefac7efdffddf7889405b7c08e6e0f030fa35