From bippy-a5840b7849dd Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman To: Reply-to: , Subject: CVE-2023-52433: netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction Description =========== In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction New elements in this transaction might expired before such transaction ends. Skip sync GC for such elements otherwise commit path might walk over an already released object. Once transaction is finished, async GC will collect such expired element. The Linux kernel CVE team has assigned CVE-2023-52433 to this issue. Affected and fixed versions =========================== Issue introduced in 6.5 with commit f6c383b8c31a and fixed in 6.5.4 with commit e3213ff99a35 Issue introduced in 6.5 with commit f6c383b8c31a and fixed in 6.6 with commit 2ee52ae94baa Issue introduced in 6.4.11 with commit e4d71d6a9c7d Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2023-52433 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/netfilter/nft_set_rbtree.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/9db9feb841f7449772f9393c16b9ef4536d8c127 https://git.kernel.org/stable/c/03caf75da1059f0460666c826e9f50e13dfd0017 https://git.kernel.org/stable/c/c323ed65f66e5387ee0a73452118d49f1dae81b8 https://git.kernel.org/stable/c/9af7dfb3c9d7985172a240f85e684c5cd33e29ce https://git.kernel.org/stable/c/9a8c544158f68f656d1734eb5ba00c4f817b76b1 https://git.kernel.org/stable/c/e3213ff99a355cda811b41e8dbb3472d13167a3a https://git.kernel.org/stable/c/2ee52ae94baabf7ee09cf2a8d854b990dac5d0e4