CVE-2025-38449— Linux kernel 安全漏洞
可能的 ATT&CK 技术 1AI
T1211 · Exploitation for Stealth影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 319c933c71f3dbdb2b3274d1634d3494c70efa06< cb4c956a15f8b7f870649454771fc3761f504b5f | affected |
319c933c71f3dbdb2b3274d1634d3494c70efa06< 08480e285c6a82ce689008d643e4a51db0aaef8b | affected | ||
319c933c71f3dbdb2b3274d1634d3494c70efa06< 3cf520d9860d4ec9f7f32068825da31f18dd3f25 | affected | ||
319c933c71f3dbdb2b3274d1634d3494c70efa06< 5307dce878d4126e1b375587318955bd019c3741 | affected | ||
3.12 | affected | ||
< 3.12 | unaffected | ||
6.6.99≤ 6.6.* | unaffected | ||
6.12.39≤ 6.12.* | unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2025-38449 基础信息
漏洞信息
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Vulnerability Title
drm/gem: Acquire references on GEM handles for framebuffers
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/gem: Acquire references on GEM handles for framebuffers A GEM handle can be released while the GEM buffer object is attached to a DRM framebuffer. This leads to the release of the dma-buf backing the buffer object, if any. [1] Trying to use the framebuffer in further mode-setting operations leads to a segmentation fault. Most easily happens with driver that use shadow planes for vmap-ing the dma-buf during a page flip. An example is shown below. [ 156.791968] ------------[ cut here ]------------ [ 156.796830] WARNING: CPU: 2 PID: 2255 at drivers/dma-buf/dma-buf.c:1527 dma_buf_vmap+0x224/0x430 [...] [ 156.942028] RIP: 0010:dma_buf_vmap+0x224/0x430 [ 157.043420] Call Trace: [ 157.045898] <TASK> [ 157.048030] ? show_trace_log_lvl+0x1af/0x2c0 [ 157.052436] ? show_trace_log_lvl+0x1af/0x2c0 [ 157.056836] ? show_trace_log_lvl+0x1af/0x2c0 [ 157.061253] ? drm_gem_shmem_vmap+0x74/0x710 [ 157.065567] ? dma_buf_vmap+0x224/0x430 [ 157.069446] ? __warn.cold+0x58/0xe4 [ 157.073061] ? dma_buf_vmap+0x224/0x430 [ 157.077111] ? report_bug+0x1dd/0x390 [ 157.080842] ? handle_bug+0x5e/0xa0 [ 157.084389] ? exc_invalid_op+0x14/0x50 [ 157.088291] ? asm_exc_invalid_op+0x16/0x20 [ 157.092548] ? dma_buf_vmap+0x224/0x430 [ 157.096663] ? dma_resv_get_singleton+0x6d/0x230 [ 157.101341] ? __pfx_dma_buf_vmap+0x10/0x10 [ 157.105588] ? __pfx_dma_resv_get_singleton+0x10/0x10 [ 157.110697] drm_gem_shmem_vmap+0x74/0x710 [ 157.114866] drm_gem_vmap+0xa9/0x1b0 [ 157.118763] drm_gem_vmap_unlocked+0x46/0xa0 [ 157.123086] drm_gem_fb_vmap+0xab/0x300 [ 157.126979] drm_atomic_helper_prepare_planes.part.0+0x487/0xb10 [ 157.133032] ? lockdep_init_map_type+0x19d/0x880 [ 157.137701] drm_atomic_helper_commit+0x13d/0x2e0 [ 157.142671] ? drm_atomic_nonblocking_commit+0xa0/0x180 [ 157.147988] drm_mode_atomic_ioctl+0x766/0xe40 [...] [ 157.346424] ---[ end trace 0000000000000000 ]--- Acquiring GEM handles for the framebuffer's GEM buffer objects prevents this from happening. The framebuffer's cleanup later puts the handle references. Commit 1a148af06000 ("drm/gem-shmem: Use dma_buf from GEM object instance") triggers the segmentation fault easily by using the dma-buf field more widely. The underlying issue with reference counting has been present before. v2: - acquire the handle instead of the BO (Christian) - fix comment style (Christian) - drop the Fixes tag (Christian) - rename err_ gotos - add missing Link tag
来源: 美国国家漏洞数据库 NVD
CVSS Information
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于帧缓冲区未正确获取GEM句柄引用，可能导致段错误。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2025-38449 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-07-25 · 共 114 条
| CVE-2025-38424 | Linux kernel 安全漏洞 | |
| CVE-2025-38438 | Linux kernel 安全漏洞 | |
| CVE-2025-38437 | Linux kernel 安全漏洞 | |
| CVE-2025-38436 | Linux kernel 安全漏洞 | |
| CVE-2025-38435 | Linux kernel 安全漏洞 | |
| CVE-2025-38434 | Linux kernel 安全漏洞 | |
| CVE-2025-38433 | Linux kernel 安全漏洞 | |
| CVE-2025-38432 | Linux kernel 安全漏洞 | |
| CVE-2025-38431 | Linux kernel 安全漏洞 | |
| CVE-2025-38430 | Linux kernel 安全漏洞 | |
| CVE-2025-38429 | Linux kernel 安全漏洞 | |
| CVE-2025-38428 | Linux kernel 安全漏洞 | |
| CVE-2025-38427 | Linux kernel 安全漏洞 | |
| CVE-2025-38425 | Linux kernel 安全漏洞 | |
| CVE-2025-38426 | Linux kernel 安全漏洞 | |
| CVE-2025-38413 | Linux kernel 安全漏洞 | |
| CVE-2025-38416 | Linux kernel 安全漏洞 | |
| CVE-2025-38415 | Linux kernel 安全漏洞 | |
| CVE-2025-38414 | Linux kernel 安全漏洞 | |
| CVE-2025-38417 | Linux kernel 安全漏洞 |
显示前 20 条，共 114 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-38449
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