| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37819: irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode() |
| |
| With ACPI in place, gicv2m_get_fwnode() is registered with the pci |
| subsystem as pci_msi_get_fwnode_cb(), which may get invoked at runtime |
| during a PCI host bridge probe. But, the call back is wrongly marked as |
| __init, causing it to be freed, while being registered with the PCI |
| subsystem and could trigger: |
| |
| Unable to handle kernel paging request at virtual address ffff8000816c0400 |
| gicv2m_get_fwnode+0x0/0x58 (P) |
| pci_set_bus_msi_domain+0x74/0x88 |
| pci_register_host_bridge+0x194/0x548 |
| |
| This is easily reproducible on a Juno board with ACPI boot. |
| |
| Retain the function for later use. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37819 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.5 with commit 0644b3daca28dcb320373ae20069c269c9386304 and fixed in 5.4.294 with commit 0c241dedc43a036599757cd08f356253fa3e5014 |
| Issue introduced in 4.5 with commit 0644b3daca28dcb320373ae20069c269c9386304 and fixed in 5.10.238 with commit b63de43af8d215b0499eac28b2caa4439183efc1 |
| Issue introduced in 4.5 with commit 0644b3daca28dcb320373ae20069c269c9386304 and fixed in 5.15.182 with commit f95659affee301464f0d058d528d96b35b452da8 |
| Issue introduced in 4.5 with commit 0644b3daca28dcb320373ae20069c269c9386304 and fixed in 6.1.138 with commit dc0d654eb4179b06d3206e4396d072108b9ba082 |
| Issue introduced in 4.5 with commit 0644b3daca28dcb320373ae20069c269c9386304 and fixed in 6.6.89 with commit 2f2803e4b5e4df2b08d378deaab78b1681ef9b30 |
| Issue introduced in 4.5 with commit 0644b3daca28dcb320373ae20069c269c9386304 and fixed in 6.12.26 with commit 3939d6f29d34cdb60e3f68b76e39e00a964a1d51 |
| Issue introduced in 4.5 with commit 0644b3daca28dcb320373ae20069c269c9386304 and fixed in 6.14.5 with commit 47bee0081b483b077c7560bc5358ad101f89c8ef |
| Issue introduced in 4.5 with commit 0644b3daca28dcb320373ae20069c269c9386304 and fixed in 6.15 with commit 3318dc299b072a0511d6dfd8367f3304fb6d9827 |
| |
| 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-2025-37819 |
| 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-v2m.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/0c241dedc43a036599757cd08f356253fa3e5014 |
| https://git.kernel.org/stable/c/b63de43af8d215b0499eac28b2caa4439183efc1 |
| https://git.kernel.org/stable/c/f95659affee301464f0d058d528d96b35b452da8 |
| https://git.kernel.org/stable/c/dc0d654eb4179b06d3206e4396d072108b9ba082 |
| https://git.kernel.org/stable/c/2f2803e4b5e4df2b08d378deaab78b1681ef9b30 |
| https://git.kernel.org/stable/c/3939d6f29d34cdb60e3f68b76e39e00a964a1d51 |
| https://git.kernel.org/stable/c/47bee0081b483b077c7560bc5358ad101f89c8ef |
| https://git.kernel.org/stable/c/3318dc299b072a0511d6dfd8367f3304fb6d9827 |
