cbcvebase.
CVE-2024-27414
published 2024-05-17

CVE-2024-27414: In the Linux kernel, the following vulnerability has been resolved: rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back In the commit d73ef2d69c0d…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
14.1th percentile
In the Linux kernel, the following vulnerability has been resolved: rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back In the commit d73ef2d69c0d ("rtnetlink: let rtnl_bridge_setlink checks IFLA_BRIDGE_MODE length"), an adjustment was made to the old loop logic in the function `rtnl_bridge_setlink` to enable the loop to also check the length of the IFLA_BRIDGE_MODE attribute. However, this adjustment removed the `break` statement and led to an error logic of the flags writing back at the end of this function. if (have_flags) memcpy(nla_data(attr), &flags, sizeof(flags)); // attr should point to IFLA_BRIDGE_FLAGS NLA !!! Before the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS. However, this is not necessarily true fow now as the updated loop will let the attr point to the last NLA, even an invalid NLA which could cause overflow writes. This patch introduces a new variable `br_flag` to save the NLA pointer that points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned error logic.

Affected

39 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.82-1 (bookworm)linux 6.1.82-1 (bookworm)
linuxlinux
linuxlinux
linuxlinux>= 047508edd602921ee8bb0f2aa2100aa2e9bedc75 < a1227b27fcccc99dc44f912b479e01a17e2d7d31a1227b27fcccc99dc44f912b479e01a17e2d7d31
linuxlinux>= 5.10.190 < 5.10.2125.10.212
linuxlinux>= 5.15.126 < 5.15.1515.15.151
linuxlinux>= 5.4.253 < 5.4.2715.4.271
linuxlinux>= 6.1.45 < 6.1.816.1.81
linuxlinux>= 6.4.10 < 6.56.5
linuxlinux>= 8dfac8071d58447e5cace4c4c6fe493ce2f615f6 < f2261eb994aa5757c1da046b78e3229a3ece0ad9f2261eb994aa5757c1da046b78e3229a3ece0ad9
linuxlinux>= abb0172fa8dc4a4ec51aa992b7269ed65959f310 < 882a51a10ecf24ce135d573afa0872aef02c5125882a51a10ecf24ce135d573afa0872aef02c5125
linuxlinux>= ad46d4861ed36315d3d9e838723ba3e367ecc042 < b9fbc44159dfc3e9a7073032752d9e03f5194a6fb9fbc44159dfc3e9a7073032752d9e03f5194a6f
linuxlinux>= d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f < 167d8642daa6a44b51de17f8ff0f584e1e762db7167d8642daa6a44b51de17f8ff0f584e1e762db7
linuxlinux>= d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f < 831bc2728fb48a8957a824cba8c264b30dca1425831bc2728fb48a8957a824cba8c264b30dca1425
linuxlinux>= d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f < 743ad091fb46e622f1b690385bb15e3cd3daf874743ad091fb46e622f1b690385bb15e3cd3daf874
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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