{"id":"CVE-2025-71120","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\n\nA zero length gss_token results in pages == 0 and in_token->pages[0]\nis NULL","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\n\nA zero length gss_token results in pages == 0 and in_token->pages[0]\nis NULL. The…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.19.99, < 4.20","linux_kernel >= 5.4.15, < 5.5","linux_kernel >= 5.5.1, < 5.10.248","linux_kernel >= 5.11, < 5.15.198","linux_kernel >= 5.16, < 6.1.160","linux_kernel >= 6.2, < 6.6.120","linux_kernel >= 6.7, < 6.12.64","linux_kernel >= 6.13, < 6.18.3","linux_kernel = 5.5","linux_kernel = 6.19"],"patched":["linux_kernel 6.18.3"],"published":"2026-01-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:18:22.753","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-71120","references":[{"url":"https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a8f1e445ce3545c90d69c9e8ff8f7821825fe810","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00529,"epssPercentile":0.44534,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-10T20:42:25.150500Z"},"ingestedAt":"2026-09-08T15:33:26.995Z","slug":"CVE-2025-71120","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\n\nA zero length gss_token results in pages == 0 and in_token->pages[0]\nis NULL. The code unconditionally evaluates\npage_address(in_token->pages[0]) for the initial memcpy, which can\ndereference NULL even when the copy length is 0. Guard the first\nmemcpy so it only runs when length > 0.\n\n## Affected\n\n- `linux_kernel >= 4.19.99, < 4.20`\n- `linux_kernel >= 5.4.15, < 5.5`\n- `linux_kernel >= 5.5.1, < 5.10.248`\n- `linux_kernel >= 5.11, < 5.15.198`\n- `linux_kernel >= 5.16, < 6.1.160`\n- `linux_kernel >= 6.2, < 6.6.120`\n- `linux_kernel >= 6.7, < 6.12.64`\n- `linux_kernel >= 6.13, < 6.18.3`\n- `linux_kernel = 5.5`\n- `linux_kernel = 6.19`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.18.3`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}