| From bippy-7c5fe7eed585 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-2025-21996: drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse() |
| |
| On the off chance that command stream passed from userspace via |
| ioctl() call to radeon_vce_cs_parse() is weirdly crafted and |
| first command to execute is to encode (case 0x03000001), the function |
| in question will attempt to call radeon_vce_cs_reloc() with size |
| argument that has not been properly initialized. Specifically, 'size' |
| will point to 'tmp' variable before the latter had a chance to be |
| assigned any value. |
| |
| Play it safe and init 'tmp' with 0, thus ensuring that |
| radeon_vce_cs_reloc() will catch an early error in cases like these. |
| |
| Found by Linux Verification Center (linuxtesting.org) with static |
| analysis tool SVACE. |
| |
| (cherry picked from commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68) |
| |
| The Linux kernel CVE team has assigned CVE-2025-21996 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.15 with commit 2fc5703abda201f138faf63bdca743d04dbf4b1a and fixed in 5.4.292 with commit 0effb378ebce52b897f85cd7f828854b8c7cb636 |
| Issue introduced in 3.15 with commit 2fc5703abda201f138faf63bdca743d04dbf4b1a and fixed in 5.10.236 with commit 5b4d9d20fd455a97920cf158dd19163b879cf65d |
| Issue introduced in 3.15 with commit 2fc5703abda201f138faf63bdca743d04dbf4b1a and fixed in 5.15.180 with commit 9b2da9c673a0da1359a2151f7ce773e2f77d71a9 |
| Issue introduced in 3.15 with commit 2fc5703abda201f138faf63bdca743d04dbf4b1a and fixed in 6.1.132 with commit 78b07dada3f02f77762d0755a96d35f53b02be69 |
| Issue introduced in 3.15 with commit 2fc5703abda201f138faf63bdca743d04dbf4b1a and fixed in 6.6.85 with commit 3ce08215cad55c10a6eeeb33d3583b6cfffe3ab8 |
| Issue introduced in 3.15 with commit 2fc5703abda201f138faf63bdca743d04dbf4b1a and fixed in 6.12.21 with commit dd1801aa01bba1760357f2a641346ae149686713 |
| Issue introduced in 3.15 with commit 2fc5703abda201f138faf63bdca743d04dbf4b1a and fixed in 6.13.9 with commit f5e049028124f755283f2c07e7a3708361ed1dc8 |
| Issue introduced in 3.15 with commit 2fc5703abda201f138faf63bdca743d04dbf4b1a and fixed in 6.14 with commit dd8689b52a24807c2d5ce0a17cb26dc87f75235c |
| |
| 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-2025-21996 |
| 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/gpu/drm/radeon/radeon_vce.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/0effb378ebce52b897f85cd7f828854b8c7cb636 |
| https://git.kernel.org/stable/c/5b4d9d20fd455a97920cf158dd19163b879cf65d |
| https://git.kernel.org/stable/c/9b2da9c673a0da1359a2151f7ce773e2f77d71a9 |
| https://git.kernel.org/stable/c/78b07dada3f02f77762d0755a96d35f53b02be69 |
| https://git.kernel.org/stable/c/3ce08215cad55c10a6eeeb33d3583b6cfffe3ab8 |
| https://git.kernel.org/stable/c/dd1801aa01bba1760357f2a641346ae149686713 |
| https://git.kernel.org/stable/c/f5e049028124f755283f2c07e7a3708361ed1dc8 |
| https://git.kernel.org/stable/c/dd8689b52a24807c2d5ce0a17cb26dc87f75235c |
