| 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-2024-26632: block: Fix iterating over an empty bio with bio_for_each_folio_all |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| block: Fix iterating over an empty bio with bio_for_each_folio_all |
| |
| If the bio contains no data, bio_first_folio() calls page_folio() on a |
| NULL pointer and oopses. Move the test that we've reached the end of |
| the bio from bio_next_folio() to bio_first_folio(). |
| |
| [axboe: add unlikely() to error case] |
| |
| The Linux kernel CVE team has assigned CVE-2024-26632 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.17 with commit 640d1930bef4f87ec8d8d2b05f0f6edc1dfcf662 and fixed in 6.1.75 with commit c6350b5cb78e9024c49eaee6fdb914ad2903a5fe |
| Issue introduced in 5.17 with commit 640d1930bef4f87ec8d8d2b05f0f6edc1dfcf662 and fixed in 6.6.14 with commit a6bd8182137a12d22d3f2cee463271bdcb491659 |
| Issue introduced in 5.17 with commit 640d1930bef4f87ec8d8d2b05f0f6edc1dfcf662 and fixed in 6.7.2 with commit ca3ede3f5893e2d26d4dbdef1eec28a8487fafde |
| Issue introduced in 5.17 with commit 640d1930bef4f87ec8d8d2b05f0f6edc1dfcf662 and fixed in 6.8 with commit 7bed6f3d08b7af27b7015da8dc3acf2b9c1f21d7 |
| |
| 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-2024-26632 |
| 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: |
| include/linux/bio.h |
| |
| |
| 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/c6350b5cb78e9024c49eaee6fdb914ad2903a5fe |
| https://git.kernel.org/stable/c/a6bd8182137a12d22d3f2cee463271bdcb491659 |
| https://git.kernel.org/stable/c/ca3ede3f5893e2d26d4dbdef1eec28a8487fafde |
| https://git.kernel.org/stable/c/7bed6f3d08b7af27b7015da8dc3acf2b9c1f21d7 |
