{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53111", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.385Z", "datePublished": "2026-06-24T16:30:44.691Z", "dateUpdated": "2026-06-24T16:30:44.691Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T16:30:44.691Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap\n\nThe bpf_lwt_xmit_push_encap helper needs to access skb_dst(skb)->dev to\ncalculate the needed headroom:\n\n\terr = skb_cow_head(skb,\n\t\t\t len + LL_RESERVED_SPACE(skb_dst(skb)->dev));\n\nBut skb->_skb_refdst may not be initialized when the skb is set up by\nbpf_prog_test_run_skb function. Executing bpf_lwt_push_ip_encap function\nin this scenario will trigger null pointer dereference, causing a kernel\ncrash as Yinhao reported:\n\n[ 105.186365] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[ 105.186382] #PF: supervisor read access in kernel mode\n[ 105.186388] #PF: error_code(0x0000) - not-present page\n[ 105.186393] PGD 121d3d067 P4D 121d3d067 PUD 106c83067 PMD 0\n[ 105.186404] Oops: 0000 [#1] PREEMPT SMP NOPTI\n[ 105.186412] CPU: 3 PID: 3250 Comm: poc Kdump: loaded Not tainted 6.19.0-rc5 #1\n[ 105.186423] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[ 105.186427] RIP: 0010:bpf_lwt_push_ip_encap+0x1eb/0x520\n[ 105.186443] Code: 0f 84 de 01 00 00 0f b7 4a 04 66 85 c9 0f 85 47 01 00 00 31 c0 5b 5d 41 5c 41 5d 41 5e c3 cc cc cc cc 48 8b 73 58 48 83 e6 fe <48> 8b 36 0f b7 be ec 00 00 00 0f b7 b6 e6 00 00 00 01 fe 83 e6 f0\n[ 105.186449] RSP: 0018:ffffbb0e0387bc50 EFLAGS: 00010246\n[ 105.186455] RAX: 000000000000004e RBX: ffff94c74e036500 RCX: ffff94c74874da00\n[ 105.186460] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff94c74e036500\n[ 105.186463] RBP: 0000000000000001 R08: 0000000000000002 R09: 0000000000000000\n[ 105.186467] R10: ffffbb0e0387bd50 R11: 0000000000000000 R12: ffffbb0e0387bc98\n[ 105.186471] R13: 0000000000000014 R14: 0000000000000000 R15: 0000000000000002\n[ 105.186484] FS: 00007f166aa4d680(0000) GS:ffff94c8b7780000(0000) knlGS:0000000000000000\n[ 105.186490] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 105.186494] CR2: 0000000000000000 CR3: 000000015eade001 CR4: 0000000000770ee0\n[ 105.186499] PKRU: 55555554\n[ 105.186502] Call Trace:\n[ 105.186507] \n[ 105.186513] bpf_lwt_xmit_push_encap+0x2b/0x40\n[ 105.186522] bpf_prog_a75eaad51e517912+0x41/0x49\n[ 105.186536] ? kvm_clock_get_cycles+0x18/0x30\n[ 105.186547] ? ktime_get+0x3c/0xa0\n[ 105.186554] bpf_test_run+0x195/0x320\n[ 105.186563] ? bpf_test_run+0x10f/0x320\n[ 105.186579] bpf_prog_test_run_skb+0x2f5/0x4f0\n[ 105.186590] __sys_bpf+0x69c/0xa40\n[ 105.186603] __x64_sys_bpf+0x1e/0x30\n[ 105.186611] do_syscall_64+0x59/0x110\n[ 105.186620] entry_SYSCALL_64_after_hwframe+0x76/0xe0\n[ 105.186649] RIP: 0033:0x7f166a97455d\n\nTemporarily add the setting of skb->_skb_refdst before bpf_test_run to resolve the issue." } ], "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": "52f278774e796a553be0c869dcaaee6f259ca795", "lessThan": "5c8d1f91fc4898d79f29d79c1a6f7c2b3ee66fb0", "status": "affected", "versionType": "git" }, { "version": "52f278774e796a553be0c869dcaaee6f259ca795", "lessThan": "c7ad31fb948fdd4905263f4324160682c3fa7bc6", "status": "affected", "versionType": "git" }, { "version": "52f278774e796a553be0c869dcaaee6f259ca795", "lessThan": "599905c3f10bb83e6e6881d5a7f5cea5df07dc23", "status": "affected", "versionType": "git" }, { "version": "52f278774e796a553be0c869dcaaee6f259ca795", "lessThan": "5500913516e071dbe23e5a404c861dd2d82c9589", "status": "affected", "versionType": "git" }, { "version": "52f278774e796a553be0c869dcaaee6f259ca795", "lessThan": "94f95328b9070909b5b875c647b17a11d3d85567", "status": "affected", "versionType": "git" }, { "version": "52f278774e796a553be0c869dcaaee6f259ca795", "lessThan": "972787479ee73006fddb5e59ab5c8e733810ff42", "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": "5.1", "status": "affected" }, { "version": "0", "lessThan": "5.1", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "5.1", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5c8d1f91fc4898d79f29d79c1a6f7c2b3ee66fb0" }, { "url": "https://git.kernel.org/stable/c/c7ad31fb948fdd4905263f4324160682c3fa7bc6" }, { "url": "https://git.kernel.org/stable/c/599905c3f10bb83e6e6881d5a7f5cea5df07dc23" }, { "url": "https://git.kernel.org/stable/c/5500913516e071dbe23e5a404c861dd2d82c9589" }, { "url": "https://git.kernel.org/stable/c/94f95328b9070909b5b875c647b17a11d3d85567" }, { "url": "https://git.kernel.org/stable/c/972787479ee73006fddb5e59ab5c8e733810ff42" } ], "title": "bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap", "x_generator": { "engine": "bippy-1.2.0" } } } }