| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nslab: ensure slab->obj_exts is clear in a newly allocated slab page\n\nktest recently reported crashes while running several buffered io tests\nwith __alloc_tagging_slab_alloc_hook() at the top of the crash call stack.\nThe signature indicates an invalid address dereference with low bits of\nslab->obj_exts being set. The bits were outside of the range used by\npage_memcg_data_flags and objext_flags and hence were not masked out\nby slab_obj_exts() when obtaining the pointer stored in slab->obj_exts.\nThe typical crash log looks like this:\n\n00510 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n00510 Mem abort info:\n00510 ESR = 0x0000000096000045\n00510 EC = 0x25: DABT (current EL), IL = 32 bits\n00510 SET = 0, FnV = 0\n00510 EA = 0, S1PTW = 0\n00510 FSC = 0x05: level 1 translation fault\n00510 Data abort info:\n00510 ISV = 0, ISS = 0x00000045, ISS2 = 0x00000000\n00510 CM = 0, WnR = 1, TnD = 0, TagAccess = 0\n00510 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n00510 user pgtable: 4k pages, 39-bit VAs, pgdp=0000000104175000\n00510 [0000000000000010] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000\n00510 Internal error: Oops: 0000000096000045 [#1] SMP\n00510 Modules linked in:\n00510 CPU: 10 UID: 0 PID: 7692 Comm: cat Not tainted 6.15.0-rc1-ktest-g189e17946605 #19327 NONE\n00510 Hardware name: linux,dummy-virt (DT)\n00510 pstate: 20001005 (nzCv daif -PAN -UAO -TCO -DIT +SSBS BTYPE=--)\n00510 pc : __alloc_tagging_slab_alloc_hook+0xe0/0x190\n00510 lr : __kmalloc_noprof+0x150/0x310\n00510 sp : ffffff80c87df6c0\n00510 x29: ffffff80c87df6c0 x28: 000000000013d1ff x27: 000000000013d200\n00510 x26: ffffff80c87df9e0 x25: 0000000000000000 x24: 0000000000000001\n00510 x23: ffffffc08041953c x22: 000000000000004c x21: ffffff80c0002180\n00510 x20: fffffffec3120840 x19: ffffff80c4821000 x18: 0000000000000000\n00510 x17: fffffffec3d02f00 x16: fffffffec3d02e00 x15: fffffffec3d00700\n00510 x14: fffffffec3d00600 x13: 0000000000000200 x12: 0000000000000006\n00510 x11: ffffffc080bb86c0 x10: 0000000000000000 x9 : ffffffc080201e58\n00510 x8 : ffffff80c4821060 x7 : 0000000000000000 x6 : 0000000055555556\n00510 x5 : 0000000000000001 x4 : 0000000000000010 x3 : 0000000000000060\n00510 x2 : 0000000000000000 x1 : ffffffc080f50cf8 x0 : ffffff80d801d000\n00510 Call trace:\n00510 __alloc_tagging_slab_alloc_hook+0xe0/0x190 (P)\n00510 __kmalloc_noprof+0x150/0x310\n00510 __bch2_folio_create+0x5c/0xf8\n00510 bch2_folio_create+0x2c/0x40\n00510 bch2_readahead+0xc0/0x460\n00510 read_pages+0x7c/0x230\n00510 page_cache_ra_order+0x244/0x3a8\n00510 page_cache_async_ra+0x124/0x170\n00510 filemap_readahead.isra.0+0x58/0xa0\n00510 filemap_get_pages+0x454/0x7b0\n00510 filemap_read+0xdc/0x418\n00510 bch2_read_iter+0x100/0x1b0\n00510 vfs_read+0x214/0x300\n00510 ksys_read+0x6c/0x108\n00510 __arm64_sys_read+0x20/0x30\n00510 invoke_syscall.constprop.0+0x54/0xe8\n00510 do_el0_svc+0x44/0xc8\n00510 el0_svc+0x18/0x58\n00510 el0t_64_sync_handler+0x104/0x130\n00510 el0t_64_sync+0x154/0x158\n00510 Code: d5384100 f9401c01 b9401aa3 b40002e1 (f8227881)\n00510 ---[ end trace 0000000000000000 ]---\n00510 Kernel panic - not syncing: Oops: Fatal exception\n00510 SMP: stopping secondary CPUs\n00510 Kernel Offset: disabled\n00510 CPU features: 0x0000,000000e0,00000410,8240500b\n00510 Memory Limit: none\n\nInvestigation indicates that these bits are already set when we allocate\nslab page and are not zeroed out after allocation. We are not yet sure\nwhy these crashes start happening only recently but regardless of the\nreason, not initializing a field that gets used later is wrong. Fix it\nby initializing slab->obj_exts during slab page allocation." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "mm/slub.c" |
| ], |
| "versions": [ |
| { |
| "version": "21c690a349baab895dc68ab70d291e1598d7109d", |
| "lessThan": "8baa747193591410a853bac9c3710142dfa4937b", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "21c690a349baab895dc68ab70d291e1598d7109d", |
| "lessThan": "28bef6622a1a874fe63aceeb0c684fab75afb3ae", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "21c690a349baab895dc68ab70d291e1598d7109d", |
| "lessThan": "d2f5819b6ed357c0c350c0616b6b9f38be59adf6", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "mm/slub.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.10", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.10", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.25", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14.4", |
| "lessThanOrEqual": "6.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.15", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.10", |
| "versionEndExcluding": "6.12.25" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.10", |
| "versionEndExcluding": "6.14.4" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.10", |
| "versionEndExcluding": "6.15" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/8baa747193591410a853bac9c3710142dfa4937b" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/28bef6622a1a874fe63aceeb0c684fab75afb3ae" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/d2f5819b6ed357c0c350c0616b6b9f38be59adf6" |
| } |
| ], |
| "title": "slab: ensure slab->obj_exts is clear in a newly allocated slab page", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-37774", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
