cbcvebase.
CVE-2024-44939
published 2024-08-26

CVE-2024-44939: In the Linux kernel, the following vulnerability has been resolved: jfs: fix null ptr deref in dtInsertEntry [syzbot reported] general protection fault…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
14.3th percentile
In the Linux kernel, the following vulnerability has been resolved: jfs: fix null ptr deref in dtInsertEntry [syzbot reported] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713 ... [Analyze] In dtInsertEntry(), when the pointer h has the same value as p, after writing name in UniStrncpy_to_le(), p->header.flag will be cleared. This will cause the previously true judgment "p->header.flag & BT-LEAF" to change to no after writing the name operation, this leads to entering an incorrect branch and accessing the uninitialized object ih when judging this condition for the second time. [Fix] After got the page, check freelist first, if freelist == 0 then exit dtInsert() and return -EINVAL.

Affected

18 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
debianlinux-6.1< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
linuxlinux
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f98bf80b20f4a930589cda48a35f751a64fe0dc2f98bf80b20f4a930589cda48a35f751a64fe0dc2
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 53023ab11836ac56fd75f7a71ec1356e50920fa953023ab11836ac56fd75f7a71ec1356e50920fa9
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6ea10dbb1e6c58384136e9adfd75f81951e423f66ea10dbb1e6c58384136e9adfd75f81951e423f6
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9c2ac38530d1a3ee558834dfa16c85a40fd0e7029c2ac38530d1a3ee558834dfa16c85a40fd0e702
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ce6dede912f064a855acf6f04a04cbb2c25b8c8cce6dede912f064a855acf6f04a04cbb2c25b8c8c
linuxlinux_kernel< 6.6.476.6.47
linuxlinux_kernel>= 0 < 6.1.112-16.1.112-1
linuxlinux_kernel>= 0 < 6.10.6-16.10.6-1
linuxlinux_kernel>= 0 < 6.10.6-16.10.6-1
linuxlinux_kernel>= 0 < 5.15.0-156.1665.15.0-156.166
linuxlinux_kernel>= 0 < 6.8.0-50.516.8.0-50.51
linuxlinux_kernel>= 6.7 < 6.10.66.10.6
msrccbl2_kernel_5.15.186.1-1_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.200.1-1_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.202.1-1_on_cbl_mariner_2.0

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_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu5.5MEDIUM
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