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Message-ID: <2025100155-CVE-2022-50423-5a66@gregkh> Date: Wed, 1 Oct 2025 13:41:56 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2022-50423: ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage() From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage() There is an use-after-free reported by KASAN: BUG: KASAN: use-after-free in acpi_ut_remove_reference+0x3b/0x82 Read of size 1 at addr ffff888112afc460 by task modprobe/2111 CPU: 0 PID: 2111 Comm: modprobe Not tainted 6.1.0-rc7-dirty Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), Call Trace: <TASK> kasan_report+0xae/0xe0 acpi_ut_remove_reference+0x3b/0x82 acpi_ut_copy_iobject_to_iobject+0x3be/0x3d5 acpi_ds_store_object_to_local+0x15d/0x3a0 acpi_ex_store+0x78d/0x7fd acpi_ex_opcode_1A_1T_1R+0xbe4/0xf9b acpi_ps_parse_aml+0x217/0x8d5 ... </TASK> The root cause of the problem is that the acpi_operand_object is freed when acpi_ut_walk_package_tree() fails in acpi_ut_copy_ipackage_to_ipackage(), lead to repeated release in acpi_ut_copy_iobject_to_iobject(). The problem was introduced by "8aa5e56eeb61" commit, this commit is to fix memory leak in acpi_ut_copy_iobject_to_iobject(), repeatedly adding remove operation, lead to "acpi_operand_object" used after free. Fix it by removing acpi_ut_remove_reference() in acpi_ut_copy_ipackage_to_ipackage(). acpi_ut_copy_ipackage_to_ipackage() is called to copy an internal package object into another internal package object, when it fails, the memory of acpi_operand_object should be freed by the caller. The Linux kernel CVE team has assigned CVE-2022-50423 to this issue. Affected and fixed versions =========================== Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 4.9.337 with commit 133462d35dae95edb944af86b986d4c9dec59bd1 Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 4.14.303 with commit 02f237423c9c6a18e062de2d474f85d5659e4eb9 Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 4.19.270 with commit c9125b643fc51b8e662f2f614096ceb45a0adbc3 Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 5.4.229 with commit dfdde4d5138bc023897033a5ac653a84e94805be Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 5.10.163 with commit 02617006b5a46f2ea55ac61f5693c7afd7bf9276 Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 5.15.86 with commit 6fde666278f91b85d71545a0ebbf41d8d7af8074 Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 6.0.16 with commit f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6 Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 6.1.2 with commit 01f2c2052ea50fb9a8ce12e4e83aed0267934ef0 Issue introduced in 3.17 with commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce and fixed in 6.2 with commit 470188b09e92d83c5a997f25f0e8fb8cd2bc3469 Issue introduced in 3.10.55 with commit b3e98f0c4f996cd53b80bad71f0d7e4a2cf3a4e8 Issue introduced in 3.12.29 with commit 7af5504c102a378376101dbd160246b10a814dd0 Issue introduced in 3.14.19 with commit e29a15484d7ea949e49ae7fb7e576a575da824a6 Issue introduced in 3.16.3 with commit e2ab6731a36966d042a2d4dabd980496cd680f75 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-2022-50423 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/acpi/acpica/utcopy.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/133462d35dae95edb944af86b986d4c9dec59bd1 https://git.kernel.org/stable/c/02f237423c9c6a18e062de2d474f85d5659e4eb9 https://git.kernel.org/stable/c/c9125b643fc51b8e662f2f614096ceb45a0adbc3 https://git.kernel.org/stable/c/dfdde4d5138bc023897033a5ac653a84e94805be https://git.kernel.org/stable/c/02617006b5a46f2ea55ac61f5693c7afd7bf9276 https://git.kernel.org/stable/c/6fde666278f91b85d71545a0ebbf41d8d7af8074 https://git.kernel.org/stable/c/f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6 https://git.kernel.org/stable/c/01f2c2052ea50fb9a8ce12e4e83aed0267934ef0 https://git.kernel.org/stable/c/470188b09e92d83c5a997f25f0e8fb8cd2bc3469
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