Curated security research, vulnerabilities, advisories and tools for practitioners.

A look at an Android ITW DNG exploit

projectzero.google | research | #android | #mobile-security | #exploit | #image-parsing | #analysis | #in-the-wild | #dng

Summary

An analysis of an in-the-wild Android exploit targeting the DNG image format, walking through the vulnerable parsing code, the exploit technique, and remediation.

Published: 2025-12-12 00:00
Collected: 2026-09-22 23:10

Related coverage

/* armenian */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiIUvaYr.woff2) format('woff2'); unicode-range: U+0308, U+0530-058F, U+2010, U+2024, U+25CC, U+FB13-FB17; } /* bengali */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiAUvaYr.woff2) format('woff2'); unicode-range: U+0951-0952, U+0964-0965, U+0980-09FE, U+1CD0, U+1CD2, U+1CD5-1CD6, U+1CD8, U+1CE1, U+1CEA, U+1CED, U+1CF2, U+1CF5-1CF7, U+200C-200D, U+20B9, U+25CC, U+A8F1; } /* canadian-aboriginal */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPh0UvaYr.woff2) format('woff2'); unicode-range: U+02C7, U+02D8-02D9, U+02DB, U+0307, U+1400-167F, U+18B0-18F5, U+25CC, U+11AB0-11ABF; } /* cyrillic-ext */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPj8UvaYr.woff2) format('woff2'); unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F; } /* cyrillic */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjYUvaYr.woff2) format('woff2'); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; } /* devanagari */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjMUvaYr.woff2) format('woff2'); unicode-range: U+0900-097F, U+1CD0-1CF9, U+200C-200D, U+20A8, U+20B9, U+20F0, U+25CC, U+A830-A839, U+A8E0-A8FF, U+11B00-11B09; } /* ethiopic */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiMUvaYr.woff2) format('woff2'); unicode-range: U+030E, U+1200-1399, U+2D80-2DDE, U+AB01-AB2E, U+1E7E0-1E7E6, U+1E7E8-1E7EB, U+1E7ED-1E7EE, U+1E7F0-1E7FE; } /* georgian */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPi0UvaYr.woff2) format('woff2'); unicode-range: U+0589, U+10A0-10FF, U+1C90-1CBA, U+1CBD-1CBF, U+205A, U+2D00-2D2F, U+2E31; } /* greek-ext */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPj4UvaYr.woff2) format('woff2'); unicode-range: U+1F00-1FFF; } /* greek */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjEUvaYr.woff2) format('woff2'); unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF; } /* gujarati */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPikUvaYr.woff2) format('woff2'); unicode-range: U+0951-0952, U+0964-0965, U+0A80-0AFF, U+200C-200D, U+20B9, U+25CC, U+A830-A839; } /* gurmukhi */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPhEUvaYr.woff2) format('woff2'); unicode-range: U+0951-0952, U+0964-0965, U+0A01-0A76, U+200C-200D, U+20B9, U+25CC, U+262C, U+A830-A839; } /* hebrew */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjAUvaYr.woff2) format('woff2'); unicode-range: U+0307-0308, U+0590-05FF, U+200C-2010, U+20AA, U+25CC, U+FB1D-FB4F; } /* khmer */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjkUvaYr.woff2) format('woff2'); unicode-range: U+1780-17FF, U+19E0-19FF, U+200C-200D, U+25CC; } /* lao */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjsUvaYr.woff2) format('woff2'); unicode-range: U+0E81-0EDF, U+200C-200D, U+25CC; } /* malayalam */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPioUvaYr.woff2) format('woff2'); unicode-range: U+0307, U+0323, U+0951-0952, U+0964-0965, U+0D00-0D7F, U+1CDA, U+1CF2, U+200C-200D, U+20B9, U+25CC, U+A830-A832; } /* oriya */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPisUvaYr.woff2) format('woff2'); unicode-range: U+0951-0952, U+0964-0965, U+0B01-0B77, U+1CDA, U+1CF2, U+200C-200D, U+20B9, U+25CC; } /* sinhala */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPi8UvaYr.woff2) format('woff2'); unicode-range: U+0964-0965, U+0D81-0DF4, U+1CF2, U+200C-200D, U+25CC, U+111E1-111F4; } /* symbols */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPlwUvaYr.woff2) format('woff2'); unicode-range: U+0001-000C, U+000E-001F, U+007F-009F, U+20DD-20E0, U+20E2-20E4, U+2150-218F, U+2190, U+2192, U+2194-2199, U+21AF, U+21E6-21F0, U+21F3, U+2218-2219, U+2299, U+22C4-22C6, U+2300-243F, U+2440-244A, U+2460-24FF, U+25A0-27BF, U+2800-28FF, U+2921-2922, U+2981, U+29BF, U+29EB, U+2B00-2BFF, U+4DC0-4DFF, U+FFF9-FFFB, U+10140-1018E, U+10190-1019C, U+101A0, U+101D0-101FD, U+102E0-102FB, U+10E60-10E7E, U+1D2C0-1D2D3, U+1D2E0-1D37F, U+1F000-1F0FF, U+1F100-1F1AD, U+1F1E6-1F1FF, U+1F30D-1F30F, U+1F315, U+1F31C, U+1F31E, U+1F320-1F32C, U+1F336, U+1F378, U+1F37D, U+1F382, U+1F393-1F39F, U+1F3A7-1F3A8, U+1F3AC-1F3AF, U+1F3C2, U+1F3C4-1F3C6, U+1F3CA-1F3CE, U+1F3D4-1F3E0, U+1F3ED, U+1F3F1-1F3F3, U+1F3F5-1F3F7, U+1F408, U+1F415, U+1F41F, U+1F426, U+1F43F, U+1F441-1F442, U+1F444, U+1F446-1F449, U+1F44C-1F44E, U+1F453, U+1F46A, U+1F47D, U+1F4A3, U+1F4B0, U+1F4B3, U+1F4B9, U+1F4BB, U+1F4BF, U+1F4C8-1F4CB, U+1F4D6, U+1F4DA, U+1F4DF, U+1F4E3-1F4E6, U+1F4EA-1F4ED, U+1F4F7, U+1F4F9-1F4FB, U+1F4FD-1F4FE, U+1F503, U+1F507-1F50B, U+1F50D, U+1F512-1F513, U+1F53E-1F54A, U+1F54F-1F5FA, U+1F610, U+1F650-1F67F, U+1F687, U+1F68D, U+1F691, U+1F694, U+1F698, U+1F6AD, U+1F6B2, U+1F6B9-1F6BA, U+1F6BC, U+1F6C6-1F6CF, U+1F6D3-1F6D7, U+1F6E0-1F6EA, U+1F6F0-1F6F3, U+1F6F7-1F6FC, U+1F700-1F7FF, U+1F800-1F80B, U+1F810-1F847, U+1F850-1F859, U+1F860-1F887, U+1F890-1F8AD, U+1F8B0-1F8BB, U+1F8C0-1F8C1, U+1F900-1F90B, U+1F93B, U+1F946, U+1F984, U+1F996, U+1F9E9, U+1FA00-1FA6F, U+1FA70-1FA7C, U+1FA80-1FA89, U+1FA8F-1FAC6, U+1FACE-1FADC, U+1FADF-1FAE9, U+1FAF0-1FAF8, U+1FB00-1FBFF; } /* tamil */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiQUvaYr.woff2) format('woff2'); unicode-range: U+0964-0965, U+0B82-0BFA, U+200C-200D, U+20B9, U+25CC; } /* telugu */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPi4UvaYr.woff2) format('woff2'); unicode-range: U+0951-0952, U+0964-0965, U+0C00-0C7F, U+1CDA, U+1CF2, U+200C-200D, U+25CC; } /* thai */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiYUvaYr.woff2) format('woff2'); unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC; } /* vietnamese */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPj0UvaYr.woff2) format('woff2'); unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; } /* latin-ext */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjwUvaYr.woff2) format('woff2'); unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; } /* latin */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 400; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvQ.woff2) format('woff2'); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; } /* armenian */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiIUvaYr.woff2) format('woff2'); unicode-range: U+0308, U+0530-058F, U+2010, U+2024, U+25CC, U+FB13-FB17; } /* bengali */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiAUvaYr.woff2) format('woff2'); unicode-range: U+0951-0952, U+0964-0965, U+0980-09FE, U+1CD0, U+1CD2, U+1CD5-1CD6, U+1CD8, U+1CE1, U+1CEA, U+1CED, U+1CF2, U+1CF5-1CF7, U+200C-200D, U+20B9, U+25CC, U+A8F1; } /* canadian-aboriginal */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPh0UvaYr.woff2) format('woff2'); unicode-range: U+02C7, U+02D8-02D9, U+02DB, U+0307, U+1400-167F, U+18B0-18F5, U+25CC, U+11AB0-11ABF; } /* cyrillic-ext */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPj8UvaYr.woff2) format('woff2'); unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F; } /* cyrillic */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjYUvaYr.woff2) format('woff2'); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; } /* devanagari */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjMUvaYr.woff2) format('woff2'); unicode-range: U+0900-097F, U+1CD0-1CF9, U+200C-200D, U+20A8, U+20B9, U+20F0, U+25CC, U+A830-A839, U+A8E0-A8FF, U+11B00-11B09; } /* ethiopic */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiMUvaYr.woff2) format('woff2'); unicode-range: U+030E, U+1200-1399, U+2D80-2DDE, U+AB01-AB2E, U+1E7E0-1E7E6, U+1E7E8-1E7EB, U+1E7ED-1E7EE, U+1E7F0-1E7FE; } /* georgian */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPi0UvaYr.woff2) format('woff2'); unicode-range: U+0589, U+10A0-10FF, U+1C90-1CBA, U+1CBD-1CBF, U+205A, U+2D00-2D2F, U+2E31; } /* greek-ext */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPj4UvaYr.woff2) format('woff2'); unicode-range: U+1F00-1FFF; } /* greek */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjEUvaYr.woff2) format('woff2'); unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF; } /* gujarati */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPikUvaYr.woff2) format('woff2'); unicode-range: U+0951-0952, U+0964-0965, U+0A80-0AFF, U+200C-200D, U+20B9, U+25CC, U+A830-A839; } /* gurmukhi */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPhEUvaYr.woff2) format('woff2'); unicode-range: U+0951-0952, U+0964-0965, U+0A01-0A76, U+200C-200D, U+20B9, U+25CC, U+262C, U+A830-A839; } /* hebrew */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjAUvaYr.woff2) format('woff2'); unicode-range: U+0307-0308, U+0590-05FF, U+200C-2010, U+20AA, U+25CC, U+FB1D-FB4F; } /* khmer */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjkUvaYr.woff2) format('woff2'); unicode-range: U+1780-17FF, U+19E0-19FF, U+200C-200D, U+25CC; } /* lao */ @font-face { font-family: 'Google Sans'; font-style: normal; font-weight: 700; src: url(https://fonts.gstatic.com/s/googlesans/v70/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjsUvaYr.woff2) format('woff2'); unicode-range: U+0E81-0EDF, U+200C-200D, U+25CC; } /* malayalam */ @font-face { font-family: 'Google Sans'; font-style: 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Sans";orphans:2;widows:2;text-align:left}h6{padding-top:8pt;color:#666666;font-size:11pt;padding-bottom:0pt;font-family:"Trebuchet MS";line-height:1.5;page-break-after:avoid;font-style:italic;orphans:2;widows:2;text-align:left}}This is part 5 of a 6-part series detailing a set of vulnerabilities found by Project Zero being exploited in the wild. To read the other parts of the series, see the introduction post.

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To read the other parts of the series, see the introduction post.