{"id":"CVE-2026-74426","summary":"afs: fix NULL pointer dereference in afs_get_tree()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nafs: fix NULL pointer dereference in afs_get_tree()\n\nafs_alloc_sbi() uses kzalloc for memory allocation. And, if\nctx-\u003edyn_root is not null, as-\u003ecell and as-\u003evolume are null.\nIn trace_afs_get_tree() they are dereferenced.\n\nKASAN error message:\n\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1\n04/01/2014\nRIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550\ninclude/trace/events/afs.h:1365\n\nCall Trace:\ntrace_afs_get_tree include/trace/events/afs.h:1365 [inline]\nafs_get_tree+0x922/0x1350 fs/afs/super.c:599\nvfs_get_tree+0x8e/0x300 fs/super.c:1572\ndo_new_mount fs/namespace.c:3011 [inline]\npath_mount+0x14a5/0x2220 fs/namespace.c:3341\ndo_mount fs/namespace.c:3354 [inline]\n__do_sys_mount fs/namespace.c:3562 [inline]\n__se_sys_mount fs/namespace.c:3539 [inline]\n__x64_sys_mount+0x283/0x300 fs/namespace.c:3539\n do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46\nentry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.","modified":"2026-08-16T03:48:35.265981245Z","published":"2026-08-15T05:59:28.427Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74426.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0b70716081c6462be9b2928ad736d0d527b09678"},{"type":"WEB","url":"https://git.kernel.org/stable/c/23b3d457d8387bcb2a61063a9e520063ada9335f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/67fb48c4a0874953212321cd5d57fdb4900dbc31"},{"type":"WEB","url":"https://git.kernel.org/stable/c/70b2842734d831c908474779bb8a76daf55f782c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/867b3ea146a041023bfcd258e6db516b1bb28f19"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d5b17474feed3c30991f07affa2473adbad95055"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d648cc2069eb081707c061849046d909f57c78b1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ea19edf71721cd42f923e3c70f4ff995b422fe3b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74426.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74426"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"80548b03991f58758a336424a90bf9f988e3b077"},{"fixed":"67fb48c4a0874953212321cd5d57fdb4900dbc31"},{"fixed":"d648cc2069eb081707c061849046d909f57c78b1"},{"fixed":"d5b17474feed3c30991f07affa2473adbad95055"},{"fixed":"867b3ea146a041023bfcd258e6db516b1bb28f19"},{"fixed":"ea19edf71721cd42f923e3c70f4ff995b422fe3b"},{"fixed":"23b3d457d8387bcb2a61063a9e520063ada9335f"},{"fixed":"70b2842734d831c908474779bb8a76daf55f782c"},{"fixed":"0b70716081c6462be9b2928ad736d0d527b09678"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74426.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.2.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74426.json"}}],"schema_version":"1.9.0"}