cbcvebase.
CVE-2024-47699
published 2024-10-21

CVE-2024-47699: In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential null-ptr-deref in nilfs_btree_insert() Patch series "nilfs2: fix…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.26%
17.8th percentile
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential null-ptr-deref in nilfs_btree_insert() Patch series "nilfs2: fix potential issues with empty b-tree nodes". This series addresses three potential issues with empty b-tree nodes that can occur with corrupted filesystem images, including one recently discovered by syzbot. This patch (of 3): If a b-tree is broken on the device, and the b-tree height is greater than 2 (the level of the root node is greater than 1) even if the number of child nodes of the b-tree root is 0, a NULL pointer dereference occurs in nilfs_btree_prepare_insert(), which is called from nilfs_btree_insert(). This is because, when the number of child nodes of the b-tree root is 0, nilfs_btree_do_lookup() does not set the block buffer head in any of path[x].bp_bh, leaving it as the initial value of NULL, but if the level of the b-tree root node is greater than 1, nilfs_btree_get_nonroot_node(), which accesses the buffer memory of path[x].bp_bh, is called. Fix this issue by adding a check to nilfs_btree_root_broken(), which performs sanity checks when reading the root node from the device, to detect this inconsistency. Thanks to Lizhi Xu for trying to solve the bug and clarifying the cause early on.

Affected

34 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.115-1 (bookworm)linux 6.1.115-1 (bookworm)
debianlinux-6.1< linux 6.1.115-1 (bookworm)linux 6.1.115-1 (bookworm)
linuxlinux
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < 2b78e9df10fb7f4e9d3d7a18417dd72fbbc1dfd02b78e9df10fb7f4e9d3d7a18417dd72fbbc1dfd0
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < 1d94dbdfbb64cc48d10dec65cc3c4fbf2497b3431d94dbdfbb64cc48d10dec65cc3c4fbf2497b343
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < 24bf40740a3da6b4056721da34997ae6938f3da124bf40740a3da6b4056721da34997ae6938f3da1
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < 73d23ecf234b7a6d47fb883f2dabe10e3230b31d73d23ecf234b7a6d47fb883f2dabe10e3230b31d
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < f68523e0f26faade18833fbef577a4295d8e2c94f68523e0f26faade18833fbef577a4295d8e2c94
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < 21839b6fbc3c41b3e374ecbdb0cabbbb2c53cf3421839b6fbc3c41b3e374ecbdb0cabbbb2c53cf34
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < db73500d3f0e558eb642aae1d4782e7726b4a03fdb73500d3f0e558eb642aae1d4782e7726b4a03f
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < 3644554d308ddf2669e459a1551a7edf60b2d62b3644554d308ddf2669e459a1551a7edf60b2d62b
linuxlinux>= 17c76b0104e4a6513983777e1a17e0297a12b0c4 < 9403001ad65ae4f4c5de368bdda3a0636b51d51a9403001ad65ae4f4c5de368bdda3a0636b51d51a
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
linuxlinux_kernel>= 0 < 6.1.115-16.1.115-1
linuxlinux_kernel>= 0 < 6.11.2-16.11.2-1
linuxlinux_kernel>= 0 < 6.11.2-16.11.2-1
linuxlinux_kernel>= 0 < 5.4.0-208.2285.4.0-208.228
linuxlinux_kernel>= 0 < 5.15.0-127.1375.15.0-127.137
linuxlinux_kernel>= 0 < 6.8.0-54.566.8.0-54.56
linuxlinux_kernel>= 0 < 6.11.0-18.186.11.0-18.18
linuxlinux_kernel>= 2.6.30 < 5.10.2275.10.227
linuxlinux_kernel>= 5.11 < 5.15.1685.15.168
linuxlinux_kernel>= 5.16 < 6.1.1136.1.113
linuxlinux_kernel>= 6.11 < 6.11.26.11.2
linuxlinux_kernel>= 6.2 < 6.6.546.6.54

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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