| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, test_run: Fix alignment problem in bpf_prog_test_run_skb()\n\nWe got a syzkaller problem because of aarch64 alignment fault\nif KFENCE enabled. When the size from user bpf program is an odd\nnumber, like 399, 407, etc, it will cause the struct skb_shared_info's\nunaligned access. As seen below:\n\n BUG: KFENCE: use-after-free read in __skb_clone+0x23c/0x2a0 net/core/skbuff.c:1032\n\n Use-after-free read at 0xffff6254fffac077 (in kfence-#213):\n __lse_atomic_add arch/arm64/include/asm/atomic_lse.h:26 [inline]\n arch_atomic_add arch/arm64/include/asm/atomic.h:28 [inline]\n arch_atomic_inc include/linux/atomic-arch-fallback.h:270 [inline]\n atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline]\n __skb_clone+0x23c/0x2a0 net/core/skbuff.c:1032\n skb_clone+0xf4/0x214 net/core/skbuff.c:1481\n ____bpf_clone_redirect net/core/filter.c:2433 [inline]\n bpf_clone_redirect+0x78/0x1c0 net/core/filter.c:2420\n bpf_prog_d3839dd9068ceb51+0x80/0x330\n bpf_dispatcher_nop_func include/linux/bpf.h:728 [inline]\n bpf_test_run+0x3c0/0x6c0 net/bpf/test_run.c:53\n bpf_prog_test_run_skb+0x638/0xa7c net/bpf/test_run.c:594\n bpf_prog_test_run kernel/bpf/syscall.c:3148 [inline]\n __do_sys_bpf kernel/bpf/syscall.c:4441 [inline]\n __se_sys_bpf+0xad0/0x1634 kernel/bpf/syscall.c:4381\n\n kfence-#213: 0xffff6254fffac000-0xffff6254fffac196, size=407, cache=kmalloc-512\n\n allocated by task 15074 on cpu 0 at 1342.585390s:\n kmalloc include/linux/slab.h:568 [inline]\n kzalloc include/linux/slab.h:675 [inline]\n bpf_test_init.isra.0+0xac/0x290 net/bpf/test_run.c:191\n bpf_prog_test_run_skb+0x11c/0xa7c net/bpf/test_run.c:512\n bpf_prog_test_run kernel/bpf/syscall.c:3148 [inline]\n __do_sys_bpf kernel/bpf/syscall.c:4441 [inline]\n __se_sys_bpf+0xad0/0x1634 kernel/bpf/syscall.c:4381\n __arm64_sys_bpf+0x50/0x60 kernel/bpf/syscall.c:4381\n\nTo fix the problem, we adjust @size so that (@size + @hearoom) is a\nmultiple of SMP_CACHE_BYTES. So we make sure the struct skb_shared_info\nis aligned to a cache line." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/bpf/test_run.c" |
| ], |
| "versions": [ |
| { |
| "version": "1cf1cae963c2e6032aebe1637e995bc2f5d330f4", |
| "lessThan": "047824a730699c6c66df43306b80f700c9dfc2fd", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1cf1cae963c2e6032aebe1637e995bc2f5d330f4", |
| "lessThan": "730fb1ef974a13915bc7651364d8b3318891cd70", |
| "status": "affected", |
| "versionType": "git" |
| }, |
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| "version": "1cf1cae963c2e6032aebe1637e995bc2f5d330f4", |
| "lessThan": "7a704dbfd3735304e261f2787c52fbc7c3884736", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1cf1cae963c2e6032aebe1637e995bc2f5d330f4", |
| "lessThan": "e60f37a1d379c821c17b08f366412dce9ef3d99f", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1cf1cae963c2e6032aebe1637e995bc2f5d330f4", |
| "lessThan": "eaa8edd86514afac9deb9bf9a5053e74f37edf40", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1cf1cae963c2e6032aebe1637e995bc2f5d330f4", |
| "lessThan": "1b597f2d6a55e9f549989913860ad5170da04964", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1cf1cae963c2e6032aebe1637e995bc2f5d330f4", |
| "lessThan": "d3fd203f36d46aa29600a72d57a1b61af80e4a25", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/bpf/test_run.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.12", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "4.12", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.14.300", |
| "lessThanOrEqual": "4.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.267", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.225", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.156", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.80", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.0.10", |
| "lessThanOrEqual": "6.0.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1", |
| "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": "4.12", |
| "versionEndExcluding": "4.14.300" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
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| "versionEndExcluding": "4.19.267" |
| }, |
| { |
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| }, |
| { |
| "vulnerable": true, |
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| "versionStartIncluding": "4.12", |
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| }, |
| { |
| "vulnerable": true, |
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| "versionStartIncluding": "4.12", |
| "versionEndExcluding": "5.15.80" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.12", |
| "versionEndExcluding": "6.0.10" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.12", |
| "versionEndExcluding": "6.1" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/047824a730699c6c66df43306b80f700c9dfc2fd" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/730fb1ef974a13915bc7651364d8b3318891cd70" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/7a704dbfd3735304e261f2787c52fbc7c3884736" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/e60f37a1d379c821c17b08f366412dce9ef3d99f" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/eaa8edd86514afac9deb9bf9a5053e74f37edf40" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1b597f2d6a55e9f549989913860ad5170da04964" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/d3fd203f36d46aa29600a72d57a1b61af80e4a25" |
| } |
| ], |
| "title": "bpf, test_run: Fix alignment problem in bpf_prog_test_run_skb()", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2022-49840", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
