net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak
When building netlink messages, tc_chain_fill_node() never initializes
the tcm_info field of struct tcmsg. Since the allocation is not zeroed,
kernel heap memory is leaked to userspace through this 4-byte field.
The fix simply zeroes tcm_info alongside the other fields that are
already initialized.
Affected products
Linux · LinuxReferences
https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-082556.htmlhttps://git.kernel.org/stable/c/1091b3c174441a52fdbb92e2fe00338f9371a91chttps://git.kernel.org/stable/c/4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3https://git.kernel.org/stable/c/71a3eda7e850ae844cb8993065f4e410c11a46cehttps://git.kernel.org/stable/c/903c3405cfcc7700260e456ab66a5867586c9e69https://git.kernel.org/stable/c/906997ea3766c24fbbf9cc4bf17c047315bbd138https://git.kernel.org/stable/c/d6db08484c6cb3d4ad696246f9d288eceba2a078https://git.kernel.org/stable/c/e35f5195cd44ff4053fbc5d71ea97681728a0099https://git.kernel.org/stable/c/e6e3eb5ee89ac4c163d46429391c889a1bb5e404