| 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-2021-47478: isofs: Fix out of bound access for corrupted isofs image |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| isofs: Fix out of bound access for corrupted isofs image |
| |
| When isofs image is suitably corrupted isofs_read_inode() can read data |
| beyond the end of buffer. Sanity-check the directory entry length before |
| using it. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47478 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.4.292 with commit 156ce5bb6cc43a80a743810199defb1dc3f55b7f |
| Fixed in 4.9.290 with commit 9ec33a9b8790c212cc926a88c5e2105f97f3f57e |
| Fixed in 4.14.255 with commit afbd40f425227e661d991757e11cc4db024e761f |
| Fixed in 4.19.217 with commit b0ddff8d68f2e43857a84dce54c3deab181c8ae1 |
| Fixed in 5.4.159 with commit 6e80e9314f8bb52d9eabe1907698718ff01120f5 |
| Fixed in 5.10.79 with commit 86d4aedcbc69c0f84551fb70f953c24e396de2d7 |
| Fixed in 5.14.18 with commit b2fa1f52d22c5455217b294629346ad23a744945 |
| Fixed in 5.15.2 with commit e7fb722586a2936b37bdff096c095c30ca06404d |
| Fixed in 5.16 with commit e96a1866b40570b5950cda8602c2819189c62a48 |
| |
| 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-2021-47478 |
| 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: |
| fs/isofs/inode.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/156ce5bb6cc43a80a743810199defb1dc3f55b7f |
| https://git.kernel.org/stable/c/9ec33a9b8790c212cc926a88c5e2105f97f3f57e |
| https://git.kernel.org/stable/c/afbd40f425227e661d991757e11cc4db024e761f |
| https://git.kernel.org/stable/c/b0ddff8d68f2e43857a84dce54c3deab181c8ae1 |
| https://git.kernel.org/stable/c/6e80e9314f8bb52d9eabe1907698718ff01120f5 |
| https://git.kernel.org/stable/c/86d4aedcbc69c0f84551fb70f953c24e396de2d7 |
| https://git.kernel.org/stable/c/b2fa1f52d22c5455217b294629346ad23a744945 |
| https://git.kernel.org/stable/c/e7fb722586a2936b37bdff096c095c30ca06404d |
| https://git.kernel.org/stable/c/e96a1866b40570b5950cda8602c2819189c62a48 |
