{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31742 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-31742 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 May 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-31742 and fix it if it is affected.\n\nWhat it is: CVE-2026-31742 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-31742 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-31742/ (Markdown: https://insights.sbomify.com/CVE-2026-31742/index.md)","id":"CVE-2026-31742","markdown":"https://insights.sbomify.com/CVE-2026-31742/index.md","name":"CVE-2026-31742","record":{"aliases":["BELL-CVE-2026-31742","DEBIAN-CVE-2026-31742","GHSA-gc3m-rhhg-qfw6","UBUNTU-CVE-2026-31742"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A local attacker can trigger a kernel oops via out-of-bounds memory access in the virtual terminal driver when resizing the console while in alternate screen mode.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvt: discard stale unicode buffer on alt screen exit after resize\n\nWhen enter_alt_screen() saves vc_uni_lines into vc_saved_uni_lines and\nsets vc_uni_lines to NULL, a subsequent console resize via vc_do_resize()\nskips reallocating the unicode buffer because vc_uni_lines is NULL.\nHowever, vc_saved_uni_lines still points to the old buffer allocated for\nthe original dimensions.\n\nWhen leave_alt_screen() later restores vc_saved_uni_lines, the buffer\ndimensions no longer match vc_rows/vc_cols. Any operation that iterates\nover the unicode buffer using the current dimensions (e.g. csi_J clearing\nthe screen) will access memory out of bounds, causing a kernel oops:\n\n  BUG: unable to handle page fault for address: 0x0000002000000020\n  RIP: 0010:csi_J+0x133/0x2d0\n\nThe faulting address 0x0000002000000020 is two adjacent u32 space\ncharacters (0x20) interpreted as a pointer, read from the row data area\npast the end of the 25-entry pointer array in a buffer allocated for\n80x25 but accessed with 240x67 dimensions.\n\nFix this by checking whether the console dimensions changed while in the\nalternate screen. If they did, free the stale saved buffer instead of\nrestoring it. The unicode screen will be lazily rebuilt via\nvc_uniscr_check() when next needed.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"vt: discard stale unicode buffer on alt screen exit after resize","id":"CVE-2026-31742","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"nvmem: zynqmp_nvmem: Fix buffer size in DMA and memcpy","id":"CVE-2026-31743"},"packages":[],"prev":{"headline":"counter: rz-mtu3-cnt: prevent counter from being toggled multiple times","id":"CVE-2026-31741"},"products":["Linux"],"published":"2026-05-01","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A local attacker can trigger a kernel oops via out-of-bounds memory access in the virtual terminal driver when resizing the console while in alternate screen mode.","url":"https://insights.sbomify.com/CVE-2026-31742/"}