| 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-2025-21788: net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases |
| |
| If the XDP program doesn't result in XDP_PASS then we leak the |
| memory allocated by am65_cpsw_build_skb(). |
| |
| It is pointless to allocate SKB memory before running the XDP |
| program as we would be wasting CPU cycles for cases other than XDP_PASS. |
| Move the SKB allocation after evaluating the XDP program result. |
| |
| This fixes the memleak. A performance boost is seen for XDP_DROP test. |
| |
| XDP_DROP test: |
| Before: 460256 rx/s 0 err/s |
| After: 784130 rx/s 0 err/s |
| |
| The Linux kernel CVE team has assigned CVE-2025-21788 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.10 with commit 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 and fixed in 6.12.16 with commit 1bba1d042107167164a0ae3a843fdf650ab005d7 |
| Issue introduced in 6.10 with commit 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 and fixed in 6.13.4 with commit dc11f049612b9d926aca2e55f8dc9d82850d0da3 |
| Issue introduced in 6.10 with commit 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 and fixed in 6.14 with commit 5db843258de1e4e6b1ef1cbd1797923c9e3de548 |
| |
| 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-2025-21788 |
| 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/ti/am65-cpsw-nuss.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/1bba1d042107167164a0ae3a843fdf650ab005d7 |
| https://git.kernel.org/stable/c/dc11f049612b9d926aca2e55f8dc9d82850d0da3 |
| https://git.kernel.org/stable/c/5db843258de1e4e6b1ef1cbd1797923c9e3de548 |
