CVE-2023-1829High· 7.8▾ MidnightPoC availableA use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 42.9 · likelihood 0.2 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Jul 31.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
1.0%
1 GitHub repo
1.0% → 1.1%
A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root.
We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ .
linux_kernel < 4.14.308linux_kernel >= 4.15, < 4.19.276linux_kernel >= 4.20, < 5.4.235linux_kernel >= 5.5, < 5.10.173linux_kernel >= 5.11, < 5.15.100linux_kernel >= 5.16, < 6.1.18linux_kernel >= 6.2, < 6.2.5Upgrade past the affected range:
linux_kernel 6.2.5Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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