From bippy-c9c4e1df01b2 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman To: Reply-to: , Subject: CVE-2024-36974: net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP Description =========== In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP If one TCA_TAPRIO_ATTR_PRIOMAP attribute has been provided, taprio_parse_mqprio_opt() must validate it, or userspace can inject arbitrary data to the kernel, the second time taprio_change() is called. First call (with valid attributes) sets dev->num_tc to a non zero value. Second call (with arbitrary mqprio attributes) returns early from taprio_parse_mqprio_opt() and bad things can happen. The Linux kernel CVE team has assigned CVE-2024-36974 to this issue. Affected and fixed versions =========================== Issue introduced in 5.2 with commit a3d43c0d56f1 and fixed in 5.4.279 with commit c6041e712446 Issue introduced in 5.2 with commit a3d43c0d56f1 and fixed in 5.10.221 with commit 6db4af09987c Issue introduced in 5.2 with commit a3d43c0d56f1 and fixed in 5.15.162 with commit d3dde4c217f0 Issue introduced in 5.2 with commit a3d43c0d56f1 and fixed in 6.1.95 with commit 0bf6cc96612b Issue introduced in 5.2 with commit a3d43c0d56f1 and fixed in 6.6.35 with commit 724050ae4b76 Issue introduced in 5.2 with commit a3d43c0d56f1 and fixed in 6.9.6 with commit c37a27a35ead Issue introduced in 5.2 with commit a3d43c0d56f1 and fixed in 6.10 with commit f921a58ae208 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-2024-36974 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/sched/sch_taprio.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/c6041e7124464ce7e896ee3f912897ce88a0c4ec https://git.kernel.org/stable/c/6db4af09987cc5d5f0136bd46148b0e0460dae5b https://git.kernel.org/stable/c/d3dde4c217f0c31ab0621912e682b57e677dd923 https://git.kernel.org/stable/c/0bf6cc96612bd396048f57d63f1ad454a846e39c https://git.kernel.org/stable/c/724050ae4b76e4fae05a923cb54101d792cf4404 https://git.kernel.org/stable/c/c37a27a35eadb59286c9092c49c241270c802ae2 https://git.kernel.org/stable/c/f921a58ae20852d188f70842431ce6519c4fdc36