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Message-ID: <2024102103-CVE-2024-47675-643d@gregkh> Date: Mon, 21 Oct 2024 14:00:03 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-47675: bpf: Fix use-after-free in bpf_uprobe_multi_link_attach() Description =========== In the Linux kernel, the following vulnerability has been resolved: bpf: Fix use-after-free in bpf_uprobe_multi_link_attach() If bpf_link_prime() fails, bpf_uprobe_multi_link_attach() goes to the error_free label and frees the array of bpf_uprobe's without calling bpf_uprobe_unregister(). This leaks bpf_uprobe->uprobe and worse, this frees bpf_uprobe->consumer without removing it from the uprobe->consumers list. The Linux kernel CVE team has assigned CVE-2024-47675 to this issue. Affected and fixed versions =========================== Issue introduced in 6.6 with commit 89ae89f53d20 and fixed in 6.6.54 with commit 790c630ab0e7 Issue introduced in 6.6 with commit 89ae89f53d20 and fixed in 6.10.13 with commit 7c1d782e5afb Issue introduced in 6.6 with commit 89ae89f53d20 and fixed in 6.11.2 with commit cdf27834c3dd Issue introduced in 6.6 with commit 89ae89f53d20 and fixed in 6.12-rc1 with commit 5fe6e308abae 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-2024-47675 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: kernel/trace/bpf_trace.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/790c630ab0e7d7aba6d186581d4627c09fce60f3 https://git.kernel.org/stable/c/7c1d782e5afbf7c50ba74ecc4ddc18a05d63e5ee https://git.kernel.org/stable/c/cdf27834c3dd5d9abf7eb8e4ee87ee9e307eb25c https://git.kernel.org/stable/c/5fe6e308abaea082c20fbf2aa5df8e14495622cf
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