cbcvebase.
CVE-2024-49889
published 2024-10-21

CVE-2024-49889: In the Linux kernel, the following vulnerability has been resolved: ext4: avoid use-after-free in ext4_ext_show_leaf() In ext4_find_extent(), path may be freed…

PriorityP338high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.26%
17.3th percentile
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid use-after-free in ext4_ext_show_leaf() In ext4_find_extent(), path may be freed by error or be reallocated, so using a previously saved *ppath may have been freed and thus may trigger use-after-free, as follows: ext4_split_extent path = *ppath; ext4_split_extent_at(ppath) path = ext4_find_extent(ppath) ext4_split_extent_at(ppath) // ext4_find_extent fails to free path // but zeroout succeeds ext4_ext_show_leaf(inode, path) eh = path[depth].p_hdr // path use-after-free !!! Similar to ext4_split_extent_at(), we use *ppath directly as an input to ext4_ext_show_leaf(). Fix a spelling error by the way. Same problem in ext4_ext_handle_unwritten_extents(). Since 'path' is only used in ext4_ext_show_leaf(), remove 'path' and use *ppath directly. This issue is triggered only when EXT_DEBUG is defined and therefore does not affect functionality.

Affected

31 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>= dfe5080939ea4686b3414b5d970a9b26733c57a4 < b0cb4561fc4284d04e69c8a66c8504928ab2484eb0cb4561fc4284d04e69c8a66c8504928ab2484e
linuxlinux>= dfe5080939ea4686b3414b5d970a9b26733c57a4 < 4999fed877bb64e3e7f9ab9996de2ca983c419284999fed877bb64e3e7f9ab9996de2ca983c41928
linuxlinux>= dfe5080939ea4686b3414b5d970a9b26733c57a4 < 2eba3b0cc5b8de624918d21f32b5b8db59a90b392eba3b0cc5b8de624918d21f32b5b8db59a90b39
linuxlinux>= dfe5080939ea4686b3414b5d970a9b26733c57a4 < 34b2096380ba475771971a778a478661a791aa1534b2096380ba475771971a778a478661a791aa15
linuxlinux>= dfe5080939ea4686b3414b5d970a9b26733c57a4 < 8b114f2cc7dd5d36729d040b68432fbd0f0a88688b114f2cc7dd5d36729d040b68432fbd0f0a8868
linuxlinux>= dfe5080939ea4686b3414b5d970a9b26733c57a4 < d483c7cc1796bd6a80e7b3a8fd494996260f6b67d483c7cc1796bd6a80e7b3a8fd494996260f6b67
linuxlinux>= dfe5080939ea4686b3414b5d970a9b26733c57a4 < 4e2524ba2ca5f54bdbb9e5153bea00421ef653f54e2524ba2ca5f54bdbb9e5153bea00421ef653f5
linuxlinux_kernel< 5.10.2275.10.227
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
linuxlinux_kernel>= 0 < 6.1.115-16.1.115-1
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1
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>= 5.11 < 5.15.1685.15.168
linuxlinux_kernel>= 5.16 < 6.1.1136.1.113
linuxlinux_kernel>= 6.11 < 6.11.36.11.3
linuxlinux_kernel>= 6.2 < 6.6.556.6.55
linuxlinux_kernel>= 6.7 < 6.10.146.10.14
msrcazl3_kernel_6.6.51.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.57.1-2_on_azure_linux_3.0

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
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