| 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-2024-35890: gro: fix ownership transfer |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| gro: fix ownership transfer |
| |
| If packets are GROed with fraglist they might be segmented later on and |
| continue their journey in the stack. In skb_segment_list those skbs can |
| be reused as-is. This is an issue as their destructor was removed in |
| skb_gro_receive_list but not the reference to their socket, and then |
| they can't be orphaned. Fix this by also removing the reference to the |
| socket. |
| |
| For example this could be observed, |
| |
| kernel BUG at include/linux/skbuff.h:3131! (skb_orphan) |
| RIP: 0010:ip6_rcv_core+0x11bc/0x19a0 |
| Call Trace: |
| ipv6_list_rcv+0x250/0x3f0 |
| __netif_receive_skb_list_core+0x49d/0x8f0 |
| netif_receive_skb_list_internal+0x634/0xd40 |
| napi_complete_done+0x1d2/0x7d0 |
| gro_cell_poll+0x118/0x1f0 |
| |
| A similar construction is found in skb_gro_receive, apply the same |
| change there. |
| |
| The Linux kernel CVE team has assigned CVE-2024-35890 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 5e10da5385d20c4bae587bc2921e5fdd9655d5fc and fixed in 5.15.154 with commit d225b0ac96dc40d7e8ae2bc227eb2c56e130975f |
| Issue introduced in 5.15 with commit 5e10da5385d20c4bae587bc2921e5fdd9655d5fc and fixed in 6.1.85 with commit 2eeab8c47c3c0276e0746bc382f405c9a236a5ad |
| Issue introduced in 5.15 with commit 5e10da5385d20c4bae587bc2921e5fdd9655d5fc and fixed in 6.6.26 with commit fc126c1d51e9552eacd2d717b9ffe9262a8a4cd6 |
| Issue introduced in 5.15 with commit 5e10da5385d20c4bae587bc2921e5fdd9655d5fc and fixed in 6.8.5 with commit 5b3b67f731296027cceb3efad881ae281213f86f |
| Issue introduced in 5.15 with commit 5e10da5385d20c4bae587bc2921e5fdd9655d5fc and fixed in 6.9 with commit ed4cccef64c1d0d5b91e69f7a8a6697c3a865486 |
| |
| 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-2024-35890 |
| 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: |
| net/core/gro.c |
| net/ipv4/udp_offload.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/d225b0ac96dc40d7e8ae2bc227eb2c56e130975f |
| https://git.kernel.org/stable/c/2eeab8c47c3c0276e0746bc382f405c9a236a5ad |
| https://git.kernel.org/stable/c/fc126c1d51e9552eacd2d717b9ffe9262a8a4cd6 |
| https://git.kernel.org/stable/c/5b3b67f731296027cceb3efad881ae281213f86f |
| https://git.kernel.org/stable/c/ed4cccef64c1d0d5b91e69f7a8a6697c3a865486 |
