| 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-2024-26955: nilfs2: prevent kernel bug at submit_bh_wbc() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nilfs2: prevent kernel bug at submit_bh_wbc() |
| |
| Fix a bug where nilfs_get_block() returns a successful status when |
| searching and inserting the specified block both fail inconsistently. If |
| this inconsistent behavior is not due to a previously fixed bug, then an |
| unexpected race is occurring, so return a temporary error -EAGAIN instead. |
| |
| This prevents callers such as __block_write_begin_int() from requesting a |
| read into a buffer that is not mapped, which would cause the BUG_ON check |
| for the BH_Mapped flag in submit_bh_wbc() to fail. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26955 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 4.19.312 with commit 91e4c4595fae5e87069e44687ae879091783c183 |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 5.4.274 with commit 32eaee72e96590a75445c8a6c7c1057673b47e07 |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 5.10.215 with commit f0fe7ad5aff4f0fcf988913313c497de85f1e186 |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 5.15.154 with commit ca581d237f3b8539c044205bb003de71d75d227c |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 6.1.84 with commit 192e9f9078c96be30b31c4b44d6294b24520fce5 |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 6.6.24 with commit 0c8aa4cfda4e4adb15d5b6536d155eca9c9cd44c |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 6.7.12 with commit 48d443d200237782dc82e6b60663ec414ef02e39 |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 6.8.3 with commit 76ffbe911e2798c7296968f5fd72f7bf67207a8d |
| Issue introduced in 2.6.30 with commit 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b and fixed in 6.9 with commit 269cdf353b5bdd15f1a079671b0f889113865f20 |
| |
| 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-2024-26955 |
| 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/nilfs2/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/91e4c4595fae5e87069e44687ae879091783c183 |
| https://git.kernel.org/stable/c/32eaee72e96590a75445c8a6c7c1057673b47e07 |
| https://git.kernel.org/stable/c/f0fe7ad5aff4f0fcf988913313c497de85f1e186 |
| https://git.kernel.org/stable/c/ca581d237f3b8539c044205bb003de71d75d227c |
| https://git.kernel.org/stable/c/192e9f9078c96be30b31c4b44d6294b24520fce5 |
| https://git.kernel.org/stable/c/0c8aa4cfda4e4adb15d5b6536d155eca9c9cd44c |
| https://git.kernel.org/stable/c/48d443d200237782dc82e6b60663ec414ef02e39 |
| https://git.kernel.org/stable/c/76ffbe911e2798c7296968f5fd72f7bf67207a8d |
| https://git.kernel.org/stable/c/269cdf353b5bdd15f1a079671b0f889113865f20 |
