| 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-2023-52526: erofs: fix memory leak of LZMA global compressed deduplication |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| erofs: fix memory leak of LZMA global compressed deduplication |
| |
| When stressing microLZMA EROFS images with the new global compressed |
| deduplication feature enabled (`-Ededupe`), I found some short-lived |
| temporary pages weren't properly released, which could slowly cause |
| unexpected OOMs hours later. |
| |
| Let's fix it now (LZ4 and DEFLATE don't have this issue.) |
| |
| The Linux kernel CVE team has assigned CVE-2023-52526 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1 with commit 5c2a64252c5dc4cfe78e5b2a531c118894e3d155 and fixed in 6.1.57 with commit 6a5a8f0a9740f865693d5aa97a42cc4504538e18 |
| Issue introduced in 6.1 with commit 5c2a64252c5dc4cfe78e5b2a531c118894e3d155 and fixed in 6.5.7 with commit c955751cbf864cf2055117dd3fe7f780d2a57b56 |
| Issue introduced in 6.1 with commit 5c2a64252c5dc4cfe78e5b2a531c118894e3d155 and fixed in 6.6 with commit 75a5221630fe5aa3fedba7a06be618db0f79ba1e |
| |
| 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-2023-52526 |
| 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/erofs/decompressor_lzma.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/6a5a8f0a9740f865693d5aa97a42cc4504538e18 |
| https://git.kernel.org/stable/c/c955751cbf864cf2055117dd3fe7f780d2a57b56 |
| https://git.kernel.org/stable/c/75a5221630fe5aa3fedba7a06be618db0f79ba1e |
