{"id":"CVE-2025-39865","title":"tee: fix NULL pointer dereference in tee_shm_put","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: fix NULL pointer dereference in tee_shm_put\n\ntee_shm_put have NULL pointer dereference:\n\n__optee_disable_shm_cache -->\n\tshm = reg_pair_to_ptr(...);//shm maybe retu…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= c05d8f66ec3470e5212c4d08c46d6cb5738d600d < f266188603c34e6e234fb0dfc3185f0ba98d71b7","Linux >= 492eb7afe858d60408b2da09adc78540c4d16543 < 4377eac565c297fdfccd2f8e9bf94ee84ff6172f","Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < 25e315bc8ad363bd1194e49062f183ad4011957e","Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < add1ecc8f3ad8df22e3599c5c88d7907cc2a3079","Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < 963fca19fe34c496e04f7dd133b807b76a5434ca","Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < 5e07a4235bb85d9ef664411e4ff4ac34783c18ff","Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < e4a718a3a47e89805c3be9d46a84de1949a98d5d","Linux 3d556a28bbfe34a80b014db49908b0f1bcb1ae80","Linux b4a661b4212b8fac8853ec3b68e4a909dccc88a1","Linux 940e68e57ab69248fabba5889e615305789db8a7","Linux >= 5.10.89 < 5.10.243","Linux >= 5.15.12 < 5.15.192","Linux >= 4.14.261 < 4.15","Linux >= 4.19.224 < 4.20","Linux >= 5.4.170 < 5.5","Linux 5.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:12:44.475636Z"},"published":"2025-09-19","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:23:06.136Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-39865","references":[{"url":"https://git.kernel.org/stable/c/f266188603c34e6e234fb0dfc3185f0ba98d71b7"},{"url":"https://git.kernel.org/stable/c/4377eac565c297fdfccd2f8e9bf94ee84ff6172f"},{"url":"https://git.kernel.org/stable/c/25e315bc8ad363bd1194e49062f183ad4011957e"},{"url":"https://git.kernel.org/stable/c/add1ecc8f3ad8df22e3599c5c88d7907cc2a3079"},{"url":"https://git.kernel.org/stable/c/963fca19fe34c496e04f7dd133b807b76a5434ca"},{"url":"https://git.kernel.org/stable/c/5e07a4235bb85d9ef664411e4ff4ac34783c18ff"},{"url":"https://git.kernel.org/stable/c/e4a718a3a47e89805c3be9d46a84de1949a98d5d"}],"tags":["cve.org"],"epss":0.00164,"epssPercentile":0.05619,"ingestedAt":"2026-11-05T22:38:32.044Z","slug":"CVE-2025-39865","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntee: fix NULL pointer dereference in tee_shm_put\n\ntee_shm_put have NULL pointer dereference:\n\n__optee_disable_shm_cache -->\n\tshm = reg_pair_to_ptr(...);//shm maybe return NULL\n        tee_shm_free(shm); -->\n\t\ttee_shm_put(shm);//crash\n\nAdd check in tee_shm_put to fix it.\n\npanic log:\nUnable to handle kernel paging request at virtual address 0000000000100cca\nMem abort info:\nESR = 0x0000000096000004\nEC = 0x25: DABT (current EL), IL = 32 bits\nSET = 0, FnV = 0\nEA = 0, S1PTW = 0\nFSC = 0x04: level 0 translation fault\nData abort info:\nISV = 0, ISS = 0x00000004, ISS2 = 0x00000000\nCM = 0, WnR = 0, TnD = 0, TagAccess = 0\nGCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\nuser pgtable: 4k pages, 48-bit VAs, pgdp=0000002049d07000\n[0000000000100cca] pgd=0000000000000000, p4d=0000000000000000\nInternal error: Oops: 0000000096000004 [#1] SMP\nCPU: 2 PID: 14442 Comm: systemd-sleep Tainted: P OE ------- ----\n6.6.0-39-generic #38\nSource Version: 938b255f6cb8817c95b0dd5c8c2944acfce94b07\nHardware name: greatwall GW-001Y1A-FTH, BIOS Great Wall BIOS V3.0\n10/26/2022\npstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : tee_shm_put+0x24/0x188\nlr : tee_shm_free+0x14/0x28\nsp : ffff001f98f9faf0\nx29: ffff001f98f9faf0 x28: ffff0020df543cc0 x27: 0000000000000000\nx26: ffff001f811344a0 x25: ffff8000818dac00 x24: ffff800082d8d048\nx23: ffff001f850fcd18 x22: 0000000000000001 x21: ffff001f98f9fb88\nx20: ffff001f83e76218 x19: ffff001f83e761e0 x18: 000000000000ffff\nx17: 303a30303a303030 x16: 0000000000000000 x15: 0000000000000003\nx14: 0000000000000001 x13: 0000000000000000 x12: 0101010101010101\nx11: 0000000000000001 x10: 0000000000000001 x9 : ffff800080e08d0c\nx8 : ffff001f98f9fb88 x7 : 0000000000000000 x6 : 0000000000000000\nx5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000\nx2 : ffff001f83e761e0 x1 : 00000000ffff001f x0 : 0000000000100cca\nCall trace:\ntee_shm_put+0x24/0x188\ntee_shm_free+0x14/0x28\n__optee_disable_shm_cache+0xa8/0x108\noptee_shutdown+0x28/0x38\nplatform_shutdown+0x28/0x40\ndevice_shutdown+0x144/0x2b0\nkernel_power_off+0x3c/0x80\nhibernate+0x35c/0x388\nstate_store+0x64/0x80\nkobj_attr_store+0x14/0x28\nsysfs_kf_write+0x48/0x60\nkernfs_fop_write_iter+0x128/0x1c0\nvfs_write+0x270/0x370\nksys_write+0x6c/0x100\n__arm64_sys_write+0x20/0x30\ninvoke_syscall+0x4c/0x120\nel0_svc_common.constprop.0+0x44/0xf0\ndo_el0_svc+0x24/0x38\nel0_svc+0x24/0x88\nel0t_64_sync_handler+0x134/0x150\nel0t_64_sync+0x14c/0x15\n\n## Affected\n\n- `Linux >= c05d8f66ec3470e5212c4d08c46d6cb5738d600d < f266188603c34e6e234fb0dfc3185f0ba98d71b7`\n- `Linux >= 492eb7afe858d60408b2da09adc78540c4d16543 < 4377eac565c297fdfccd2f8e9bf94ee84ff6172f`\n- `Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < 25e315bc8ad363bd1194e49062f183ad4011957e`\n- `Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < add1ecc8f3ad8df22e3599c5c88d7907cc2a3079`\n- `Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < 963fca19fe34c496e04f7dd133b807b76a5434ca`\n- `Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < 5e07a4235bb85d9ef664411e4ff4ac34783c18ff`\n- `Linux >= dfd0743f1d9ea76931510ed150334d571fbab49d < e4a718a3a47e89805c3be9d46a84de1949a98d5d`\n- `Linux 3d556a28bbfe34a80b014db49908b0f1bcb1ae80`\n- `Linux b4a661b4212b8fac8853ec3b68e4a909dccc88a1`\n- `Linux 940e68e57ab69248fabba5889e615305789db8a7`\n- `Linux >= 5.10.89 < 5.10.243`\n- `Linux >= 5.15.12 < 5.15.192`\n- `Linux >= 4.14.261 < 4.15`\n- `Linux >= 4.19.224 < 4.20`\n- `Linux >= 5.4.170 < 5.5`\n- `Linux 5.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}