cbcvebase.
CVE-2024-41083
published 2024-07-29

CVE-2024-41083: In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_page_mkwrite() to check folio->mapping is valid Fix netfs_page_mkwrite()…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.20%
9.6th percentile
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_page_mkwrite() to check folio->mapping is valid Fix netfs_page_mkwrite() to check that folio->mapping is valid once it has taken the folio lock (as filemap_page_mkwrite() does). Without this, generic/247 occasionally oopses with something like the following: BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page RIP: 0010:trace_event_raw_event_netfs_folio+0x61/0xc0 ... Call Trace: ? __die_body+0x1a/0x60 ? page_fault_oops+0x6e/0xa0 ? exc_page_fault+0xc2/0xe0 ? asm_exc_page_fault+0x22/0x30 ? trace_event_raw_event_netfs_folio+0x61/0xc0 trace_netfs_folio+0x39/0x40 netfs_page_mkwrite+0x14c/0x1d0 do_page_mkwrite+0x50/0x90 do_pte_missing+0x184/0x200 __handle_mm_fault+0x42d/0x500 handle_mm_fault+0x121/0x1f0 do_user_addr_fault+0x23e/0x3c0 exc_page_fault+0xc2/0xe0 asm_exc_page_fault+0x22/0x30 This is due to the invalidate_inode_pages2_range() issued at the end of the DIO write interfering with the mmap'd writes.

Affected

8 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.9.8-1 (forky)linux 6.9.8-1 (forky)
linuxlinux
linuxlinux>= 102a7e2c598c22bd2621fa97eb1c93c89d469a12 < 3473eb87afd402e415a8ca885b284ea0420dde253473eb87afd402e415a8ca885b284ea0420dde25
linuxlinux>= 102a7e2c598c22bd2621fa97eb1c93c89d469a12 < a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2
linuxlinux_kernel>= 0 < 6.9.8-16.9.8-1
linuxlinux_kernel>= 0 < 6.9.8-16.9.8-1
linuxlinux_kernel>= 0 < 6.8.0-48.486.8.0-48.48
linuxlinux_kernel>= 6.8 < 6.9.86.9.8

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
vendor_ubuntu5.5MEDIUM
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