cbcvebase.
CVE-2024-26871
published 2024-04-17

CVE-2024-26871: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix NULL pointer dereference in f2fs_submit_page_write() BUG: kernel NULL pointer…

PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
12.8th percentile
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix NULL pointer dereference in f2fs_submit_page_write() BUG: kernel NULL pointer dereference, address: 0000000000000014 RIP: 0010:f2fs_submit_page_write+0x6cf/0x780 [f2fs] Call Trace: ? show_regs+0x6e/0x80 ? __die+0x29/0x70 ? page_fault_oops+0x154/0x4a0 ? prb_read_valid+0x20/0x30 ? __irq_work_queue_local+0x39/0xd0 ? irq_work_queue+0x36/0x70 ? do_user_addr_fault+0x314/0x6c0 ? exc_page_fault+0x7d/0x190 ? asm_exc_page_fault+0x2b/0x30 ? f2fs_submit_page_write+0x6cf/0x780 [f2fs] ? f2fs_submit_page_write+0x736/0x780 [f2fs] do_write_page+0x50/0x170 [f2fs] f2fs_outplace_write_data+0x61/0xb0 [f2fs] f2fs_do_write_data_page+0x3f8/0x660 [f2fs] f2fs_write_single_data_page+0x5bb/0x7a0 [f2fs] f2fs_write_cache_pages+0x3da/0xbe0 [f2fs] ... It is possible that other threads have added this fio to io->bio and submitted the io->bio before entering f2fs_submit_page_write(). At this point io->bio = NULL. If is_end_zone_blkaddr(sbi, fio->new_blkaddr) of this fio is true, then an NULL pointer dereference error occurs at bio_get(io->bio). The original code for determining zone end was after "out:", which would have missed some fio who is zone end. I've moved this code before "skip:" to make sure it's done for each fio.

Affected

12 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.7.12-1 (forky)linux 6.7.12-1 (forky)
linuxlinux
linuxlinux>= e067dc3c6b9c419bac43c6a0be2d85f44681f863 < 8e2ea8b04cb8d976110c4568509e67d6a39b28898e2ea8b04cb8d976110c4568509e67d6a39b2889
linuxlinux>= e067dc3c6b9c419bac43c6a0be2d85f44681f863 < 4c122a32582b67bdd44ca8d25f894ee2dc54f5664c122a32582b67bdd44ca8d25f894ee2dc54f566
linuxlinux>= e067dc3c6b9c419bac43c6a0be2d85f44681f863 < 6d102382a11d5e6035f6c98f6e508a38541f7af36d102382a11d5e6035f6c98f6e508a38541f7af3
linuxlinux>= e067dc3c6b9c419bac43c6a0be2d85f44681f863 < c2034ef6192a65a986a45c2aa2ed05824fdc0e9fc2034ef6192a65a986a45c2aa2ed05824fdc0e9f
linuxlinux_kernel>= 0 < 6.7.12-16.7.12-1
linuxlinux_kernel>= 0 < 6.7.12-16.7.12-1
linuxlinux_kernel>= 0 < 6.8.0-35.356.8.0-35.35
linuxlinux_kernel>= 6.5 < 6.6.236.6.23
linuxlinux_kernel>= 6.7 < 6.7.116.7.11
linuxlinux_kernel>= 6.8 < 6.8.26.8.2

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_ubuntu6.3MEDIUM
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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