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Message-ID: <2024061949-CVE-2024-38545-7161@gregkh> Date: Wed, 19 Jun 2024 15:35:54 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-38545: RDMA/hns: Fix UAF for cq async event Description =========== In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix UAF for cq async event The refcount of CQ is not protected by locks. When CQ asynchronous events and CQ destruction are concurrent, CQ may have been released, which will cause UAF. Use the xa_lock() to protect the CQ refcount. The Linux kernel CVE team has assigned CVE-2024-38545 to this issue. Affected and fixed versions =========================== Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.1.93 with commit 763780ef0336 Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.6.33 with commit 63da190eeb5c Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.8.12 with commit 39d26cf46306 Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.9.3 with commit 37a7559dc135 Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.10-rc1 with commit a942ec2745ca 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-2024-38545 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: drivers/infiniband/hw/hns/hns_roce_cq.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/763780ef0336a973e933e40e919339381732dcaf https://git.kernel.org/stable/c/63da190eeb5c9d849b71f457b15b308c94cbaf08 https://git.kernel.org/stable/c/39d26cf46306bdc7ae809ecfdbfeff5aa1098911 https://git.kernel.org/stable/c/37a7559dc1358a8d300437e99ed8ecdab0671507 https://git.kernel.org/stable/c/a942ec2745ca864cd8512142100e4027dc306a42
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