cbcvebase.
CVE-2024-49983
published 2024-10-21

CVE-2024-49983: In the Linux kernel, the following vulnerability has been resolved: ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free When calling…

PriorityP336high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.25%
16.4th percentile
In the Linux kernel, the following vulnerability has been resolved: ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free When calling ext4_force_split_extent_at() in ext4_ext_replay_update_ex(), the 'ppath' is updated but it is the 'path' that is freed, thus potentially triggering a double-free in the following process: ext4_ext_replay_update_ex ppath = path ext4_force_split_extent_at(&ppath) ext4_split_extent_at ext4_ext_insert_extent ext4_ext_create_new_leaf ext4_ext_grow_indepth ext4_find_extent if (depth > path[0].p_maxdepth) kfree(path) ---> path First freed *orig_path = path = NULL ---> null ppath kfree(path) ---> path double-free !!! So drop the unnecessary ppath and use path directly to avoid this problem. And use ext4_find_extent() directly to update path, avoiding unnecessary memory allocation and freeing. Also, propagate the error returned by ext4_find_extent() instead of using strange error codes.

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>= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < 8c26d9e53e5fbacda0732a577e97c5a5b7882aaf8c26d9e53e5fbacda0732a577e97c5a5b7882aaf
linuxlinux>= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < a34bed978364114390162c27e50fca50791c568da34bed978364114390162c27e50fca50791c568d
linuxlinux>= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < 6367d3f04c69e2b8770b8137bd800e0784b0abbc6367d3f04c69e2b8770b8137bd800e0784b0abbc
linuxlinux>= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < 1b558006d98b7b0b730027be0ee98973dd10ee0d1b558006d98b7b0b730027be0ee98973dd10ee0d
linuxlinux>= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < 3ff710662e8d86a63a39b334e9ca0cb10e5c14b03ff710662e8d86a63a39b334e9ca0cb10e5c14b0
linuxlinux>= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < 63adc9016917e6970fb0104ee5fd6770f02b2d8063adc9016917e6970fb0104ee5fd6770f02b2d80
linuxlinux>= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < 5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce955c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95
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>= 5.10 < 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 < 6.11.36.11.3
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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