| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-46965: mtd: physmap: physmap-bt1-rom: Fix unintentional stack access |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mtd: physmap: physmap-bt1-rom: Fix unintentional stack access |
| |
| Cast &data to (char *) in order to avoid unintentionally accessing |
| the stack. |
| |
| Notice that data is of type u32, so any increment to &data |
| will be in the order of 4-byte chunks, and this piece of code |
| is actually intended to be a byte offset. |
| |
| Addresses-Coverity-ID: 1497765 ("Out-of-bounds access") |
| |
| The Linux kernel CVE team has assigned CVE-2021-46965 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit b3e79e7682e075326df8041b826b03453acacd0a and fixed in 5.10.36 with commit 34ec706bf0b7c4ca249a729c1bcb91f706c7a7be |
| Issue introduced in 5.10 with commit b3e79e7682e075326df8041b826b03453acacd0a and fixed in 5.11.20 with commit 4e4ebb827bf09311469ffd9d0c14ed40ed9747aa |
| Issue introduced in 5.10 with commit b3e79e7682e075326df8041b826b03453acacd0a and fixed in 5.12.3 with commit 4d786870e3262ec098a3b4ed10b895176bc66ecb |
| Issue introduced in 5.10 with commit b3e79e7682e075326df8041b826b03453acacd0a and fixed in 5.13 with commit 683313993dbe1651c7aa00bb42a041d70e914925 |
| |
| 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-2021-46965 |
| 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/mtd/maps/physmap-bt1-rom.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/34ec706bf0b7c4ca249a729c1bcb91f706c7a7be |
| https://git.kernel.org/stable/c/4e4ebb827bf09311469ffd9d0c14ed40ed9747aa |
| https://git.kernel.org/stable/c/4d786870e3262ec098a3b4ed10b895176bc66ecb |
| https://git.kernel.org/stable/c/683313993dbe1651c7aa00bb42a041d70e914925 |
