| 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-2023-52810: fs/jfs: Add check for negative db_l2nbperpage |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| fs/jfs: Add check for negative db_l2nbperpage |
| |
| l2nbperpage is log2(number of blks per page), and the minimum legal |
| value should be 0, not negative. |
| |
| In the case of l2nbperpage being negative, an error will occur |
| when subsequently used as shift exponent. |
| |
| Syzbot reported this bug: |
| |
| UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12 |
| shift exponent -16777216 is negative |
| |
| The Linux kernel CVE team has assigned CVE-2023-52810 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.14.331 with commit cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01 |
| Fixed in 4.19.300 with commit 8f2964df6bfce9d92d81ca552010b8677af8d9dc |
| Fixed in 5.4.262 with commit a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1 |
| Fixed in 5.10.202 with commit 524b4f203afcf87accfe387e846f33f916f0c907 |
| Fixed in 5.15.140 with commit 5f148b16972e5f4592629b244d5109b15135f53f |
| Fixed in 6.1.64 with commit 0cb567e727339a192f9fd0db00781d73a91d15a6 |
| Fixed in 6.5.13 with commit 491085258185ffc4fb91555b0dba895fe7656a45 |
| Fixed in 6.6.3 with commit 1a7c53fdea1d189087544d9a606d249e93c4934b |
| Fixed in 6.7 with commit 525b861a008143048535011f3816d407940f4bfa |
| |
| 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-2023-52810 |
| 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/jfs/jfs_dmap.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/cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01 |
| https://git.kernel.org/stable/c/8f2964df6bfce9d92d81ca552010b8677af8d9dc |
| https://git.kernel.org/stable/c/a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1 |
| https://git.kernel.org/stable/c/524b4f203afcf87accfe387e846f33f916f0c907 |
| https://git.kernel.org/stable/c/5f148b16972e5f4592629b244d5109b15135f53f |
| https://git.kernel.org/stable/c/0cb567e727339a192f9fd0db00781d73a91d15a6 |
| https://git.kernel.org/stable/c/491085258185ffc4fb91555b0dba895fe7656a45 |
| https://git.kernel.org/stable/c/1a7c53fdea1d189087544d9a606d249e93c4934b |
| https://git.kernel.org/stable/c/525b861a008143048535011f3816d407940f4bfa |
