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Message-ID: <2024052141-CVE-2021-47373-e5ff@gregkh> Date: Tue, 21 May 2024 17:03:50 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2021-47373: irqchip/gic-v3-its: Fix potential VPE leak on error Description =========== In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v3-its: Fix potential VPE leak on error In its_vpe_irq_domain_alloc, when its_vpe_init() returns an error, there is an off-by-one in the number of VPEs to be freed. Fix it by simply passing the number of VPEs allocated, which is the index of the loop iterating over the VPEs. [maz: fixed commit message] The Linux kernel CVE team has assigned CVE-2021-47373 to this issue. Affected and fixed versions =========================== Issue introduced in 4.14 with commit 7d75bbb4bc1a and fixed in 4.14.249 with commit 7d39992d45ac Issue introduced in 4.14 with commit 7d75bbb4bc1a and fixed in 4.19.209 with commit 5701e8bff314 Issue introduced in 4.14 with commit 7d75bbb4bc1a and fixed in 5.4.150 with commit 42d3711c2378 Issue introduced in 4.14 with commit 7d75bbb4bc1a and fixed in 5.10.70 with commit 568662e37f92 Issue introduced in 4.14 with commit 7d75bbb4bc1a and fixed in 5.14.9 with commit e0c1c2e5da19 Issue introduced in 4.14 with commit 7d75bbb4bc1a and fixed in 5.15 with commit 280bef512933 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-2021-47373 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/irqchip/irq-gic-v3-its.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/7d39992d45acd6f2d6b2f62389c55b61fb3d486b https://git.kernel.org/stable/c/5701e8bff314c155e7afdc467b1e0389d86853d0 https://git.kernel.org/stable/c/42d3711c23781045e7a5cd28536c774b9a66d20b https://git.kernel.org/stable/c/568662e37f927e3dc3e475f3ff7cf4ab7719c5e7 https://git.kernel.org/stable/c/e0c1c2e5da19685a20557a50f10c6aa4fa26aa84 https://git.kernel.org/stable/c/280bef512933b2dda01d681d8cbe499b98fc5bdd
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