{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2024-26589", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.126Z", "datePublished": "2024-02-22T16:13:33.713Z", "dateUpdated": "2024-08-02T00:07:19.728Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:19:07.294Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject variable offset alu on PTR_TO_FLOW_KEYS\n\nFor PTR_TO_FLOW_KEYS, check_flow_keys_access() only uses fixed off\nfor validation. However, variable offset ptr alu is not prohibited\nfor this ptr kind. So the variable offset is not checked.\n\nThe following prog is accepted:\n\n func#0 @0\n 0: R1=ctx() R10=fp0\n 0: (bf) r6 = r1 ; R1=ctx() R6_w=ctx()\n 1: (79) r7 = *(u64 *)(r6 +144) ; R6_w=ctx() R7_w=flow_keys()\n 2: (b7) r8 = 1024 ; R8_w=1024\n 3: (37) r8 /= 1 ; R8_w=scalar()\n 4: (57) r8 &= 1024 ; R8_w=scalar(smin=smin32=0,\n smax=umax=smax32=umax32=1024,var_off=(0x0; 0x400))\n 5: (0f) r7 += r8\n mark_precise: frame0: last_idx 5 first_idx 0 subseq_idx -1\n mark_precise: frame0: regs=r8 stack= before 4: (57) r8 &= 1024\n mark_precise: frame0: regs=r8 stack= before 3: (37) r8 /= 1\n mark_precise: frame0: regs=r8 stack= before 2: (b7) r8 = 1024\n 6: R7_w=flow_keys(smin=smin32=0,smax=umax=smax32=umax32=1024,var_off\n =(0x0; 0x400)) R8_w=scalar(smin=smin32=0,smax=umax=smax32=umax32=1024,\n var_off=(0x0; 0x400))\n 6: (79) r0 = *(u64 *)(r7 +0) ; R0_w=scalar()\n 7: (95) exit\n\nThis prog loads flow_keys to r7, and adds the variable offset r8\nto r7, and finally causes out-of-bounds access:\n\n BUG: unable to handle page fault for address: ffffc90014c80038\n [...]\n Call Trace:\n \n bpf_dispatcher_nop_func include/linux/bpf.h:1231 [inline]\n __bpf_prog_run include/linux/filter.h:651 [inline]\n bpf_prog_run include/linux/filter.h:658 [inline]\n bpf_prog_run_pin_on_cpu include/linux/filter.h:675 [inline]\n bpf_flow_dissect+0x15f/0x350 net/core/flow_dissector.c:991\n bpf_prog_test_run_flow_dissector+0x39d/0x620 net/bpf/test_run.c:1359\n bpf_prog_test_run kernel/bpf/syscall.c:4107 [inline]\n __sys_bpf+0xf8f/0x4560 kernel/bpf/syscall.c:5475\n __do_sys_bpf kernel/bpf/syscall.c:5561 [inline]\n __se_sys_bpf kernel/bpf/syscall.c:5559 [inline]\n __x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:5559\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nFix this by rejecting ptr alu with variable offset on flow_keys.\nApplying the patch rejects the program with \"R7 pointer arithmetic\non flow_keys prohibited\"." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/verifier.c" ], "versions": [ { "version": "d58e468b1112", "lessThan": "29ffa63f21bc", "status": "affected", "versionType": "git" }, { "version": "d58e468b1112", "lessThan": "4108b86e324d", "status": "affected", "versionType": "git" }, { "version": "d58e468b1112", "lessThan": "e8d3872b617c", "status": "affected", "versionType": "git" }, { "version": "d58e468b1112", "lessThan": "1b500d5d6cec", "status": "affected", "versionType": "git" }, { "version": "d58e468b1112", "lessThan": "22c7fa171a02", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/verifier.c" ], "versions": [ { "version": "4.20", "status": "affected" }, { "version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.148", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.75", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.14", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.7.2", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/29ffa63f21bcdcef3e36b03cccf9d0cd031f6ab0" }, { "url": "https://git.kernel.org/stable/c/4108b86e324da42f7ed425bd71632fd844300dc8" }, { "url": "https://git.kernel.org/stable/c/e8d3872b617c21100c5ee4f64e513997a68c2e3d" }, { "url": "https://git.kernel.org/stable/c/1b500d5d6cecf98dd6ca88bc9e7ae1783c83e6d3" }, { "url": "https://git.kernel.org/stable/c/22c7fa171a02d310e3a3f6ed46a698ca8a0060ed" } ], "title": "bpf: Reject variable offset alu on PTR_TO_FLOW_KEYS", "x_generator": { "engine": "bippy-a5840b7849dd" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26589", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-02-22T19:09:08.259778Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T17:21:01.815Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:07:19.728Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/29ffa63f21bcdcef3e36b03cccf9d0cd031f6ab0", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/4108b86e324da42f7ed425bd71632fd844300dc8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e8d3872b617c21100c5ee4f64e513997a68c2e3d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/1b500d5d6cecf98dd6ca88bc9e7ae1783c83e6d3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/22c7fa171a02d310e3a3f6ed46a698ca8a0060ed", "tags": [ "x_transferred" ] } ] } ] } }