afs: fix NULL pointer dereference in afs_get_tree()
Summary
| CVE | CVE-2026-74426 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:22:44 UTC |
| Updated | 2026-08-17 06:19:38 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: afs: fix NULL pointer dereference in afs_get_tree() afs_alloc_sbi() uses kzalloc for memory allocation. And, if ctx->dyn_root is not null, as->cell and as->volume are null. In trace_afs_get_tree() they are dereferenced. KASAN error message: KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550 include/trace/events/afs.h:1365 Call Trace: trace_afs_get_tree include/trace/events/afs.h:1365 [inline] afs_get_tree+0x922/0x1350 fs/afs/super.c:599 vfs_get_tree+0x8e/0x300 fs/super.c:1572 do_new_mount fs/namespace.c:3011 [inline] path_mount+0x14a5/0x2220 fs/namespace.c:3341 do_mount fs/namespace.c:3354 [inline] __do_sys_mount fs/namespace.c:3562 [inline] __se_sys_mount fs/namespace.c:3539 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3539 do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 Found by Linux Verification Center (linuxtesting.org) with Syzkaller. |
Risk And Classification
EPSS: 0.001650000 probability, percentile 0.061900000 (date 2026-08-17)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 67fb48c4a0874953212321cd5d57fdb4900dbc31 git | Not specified |
| CNA | Linux | Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 d648cc2069eb081707c061849046d909f57c78b1 git | Not specified |
| CNA | Linux | Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 d5b17474feed3c30991f07affa2473adbad95055 git | Not specified |
| CNA | Linux | Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 867b3ea146a041023bfcd258e6db516b1bb28f19 git | Not specified |
| CNA | Linux | Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 ea19edf71721cd42f923e3c70f4ff995b422fe3b git | Not specified |
| CNA | Linux | Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 23b3d457d8387bcb2a61063a9e520063ada9335f git | Not specified |
| CNA | Linux | Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 70b2842734d831c908474779bb8a76daf55f782c git | Not specified |
| CNA | Linux | Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 0b70716081c6462be9b2928ad736d0d527b09678 git | Not specified |
| CNA | Linux | Linux | affected 5.2 | Not specified |
| CNA | Linux | Linux | unaffected 5.2 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/d648cc2069eb081707c061849046d909f57c78b1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/67fb48c4a0874953212321cd5d57fdb4900dbc31 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/70b2842734d831c908474779bb8a76daf55f782c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0b70716081c6462be9b2928ad736d0d527b09678 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d5b17474feed3c30991f07affa2473adbad95055 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/867b3ea146a041023bfcd258e6db516b1bb28f19 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/23b3d457d8387bcb2a61063a9e520063ada9335f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ea19edf71721cd42f923e3c70f4ff995b422fe3b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.