[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2025-38449":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":19,"related":20,"reserved_at":9,"published_at":21,"modified_at":22,"state":9,"summary":23,"references_raw":25,"kevs":32,"epss":9,"epss_history":33,"metrics":34,"affected":41},"DEBIAN-CVE-2025-38449","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]  \u003CTASK> [  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",null,[],[],[],[14],{"_key":15},"CVE-2025-38449",[17],{"_key":18},"DSA-5975-1",[],[],"2025-07-25T16:15:30.443Z","2026-04-28T20:29:58.205532Z",{"cisa_kev":24,"cisa_ransomware":24,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[26],{"url":27,"sources":28,"tags":30},"https://security-tracker.debian.org/tracker/CVE-2025-38449",[29],"osv_debian",[31],"Advisory",[],[],[35],{"source":29,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":36,"cvss_v4_0":9},{"baseScore":37,"baseSeverity":9,"vectorString":38,"impactScore":39,"exploitabilityScore":40},5.5,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",6,4.6,[42],{"ecosystem":43,"name":44,"vendor":45,"product":44,"cpe_part":9,"purl_type":46,"purl_namespace":45,"purl_name":44,"source":9,"versions":47},"Debian","linux","debian","deb",[48,52,53,57],{"version":49,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":49,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":54,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":55,"version_end_type":56,"fixed_in":9},"lt6_12_41_1","6.12.41-1","excluding",{"version":58,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":59,"version_end_type":56,"fixed_in":9},"lt6_16_3_1","6.16.3-1"]