| 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-2024-45030: igb: cope with large MAX_SKB_FRAGS |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| igb: cope with large MAX_SKB_FRAGS |
| |
| Sabrina reports that the igb driver does not cope well with large |
| MAX_SKB_FRAG values: setting MAX_SKB_FRAG to 45 causes payload |
| corruption on TX. |
| |
| An easy reproducer is to run ssh to connect to the machine. With |
| MAX_SKB_FRAGS=17 it works, with MAX_SKB_FRAGS=45 it fails. This has |
| been reported originally in |
| https://bugzilla.redhat.com/show_bug.cgi?id=2265320 |
| |
| The root cause of the issue is that the driver does not take into |
| account properly the (possibly large) shared info size when selecting |
| the ring layout, and will try to fit two packets inside the same 4K |
| page even when the 1st fraglist will trump over the 2nd head. |
| |
| Address the issue by checking if 2K buffers are insufficient. |
| |
| The Linux kernel CVE team has assigned CVE-2024-45030 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 3948b05950fdd64002a5f182c65ba5cf2d53cf71 and fixed in 6.6.48 with commit 8ea80ff5d8298356d28077bc30913ed37df65109 |
| Issue introduced in 6.4 with commit 3948b05950fdd64002a5f182c65ba5cf2d53cf71 and fixed in 6.10.7 with commit b52bd8bcb9e8ff250c79b44f9af8b15cae8911ab |
| Issue introduced in 6.4 with commit 3948b05950fdd64002a5f182c65ba5cf2d53cf71 and fixed in 6.11 with commit 8aba27c4a5020abdf60149239198297f88338a8d |
| |
| 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-2024-45030 |
| 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: |
| drivers/net/ethernet/intel/igb/igb_main.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/8ea80ff5d8298356d28077bc30913ed37df65109 |
| https://git.kernel.org/stable/c/b52bd8bcb9e8ff250c79b44f9af8b15cae8911ab |
| https://git.kernel.org/stable/c/8aba27c4a5020abdf60149239198297f88338a8d |
