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
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 20.04 | noarch | linux-bluefield | < any | UNKNOWN |
git.kernel.org/linus/bcc87d978b834c298bbdd9c52454c5d0a946e97e (6.11-rc1)
git.kernel.org/stable/c/68d19af95a353f5e2b021602180b65b303eba99d
git.kernel.org/stable/c/bcc87d978b834c298bbdd9c52454c5d0a946e97e
launchpad.net/bugs/cve/CVE-2024-42254
nvd.nist.gov/vuln/detail/CVE-2024-42254
security-tracker.debian.org/tracker/CVE-2024-42254
www.cve.org/CVERecord?id=CVE-2024-42254