{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-50219", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.430Z", "datePublished": "2025-06-18T11:03:54.711Z", "dateUpdated": "2025-06-18T11:03:54.711Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-06-18T11:03:54.711Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix KASAN use-after-free Read in compute_effective_progs\n\nSyzbot found a Use After Free bug in compute_effective_progs().\nThe reproducer creates a number of BPF links, and causes a fault\ninjected alloc to fail, while calling bpf_link_detach on them.\nLink detach triggers the link to be freed by bpf_link_free(),\nwhich calls __cgroup_bpf_detach() and update_effective_progs().\nIf the memory allocation in this function fails, the function restores\nthe pointer to the bpf_cgroup_link on the cgroup list, but the memory\ngets freed just after it returns. After this, every subsequent call to\nupdate_effective_progs() causes this already deallocated pointer to be\ndereferenced in prog_list_length(), and triggers KASAN UAF error.\n\nTo fix this issue don't preserve the pointer to the prog or link in the\nlist, but remove it and replace it with a dummy prog without shrinking\nthe table. The subsequent call to __cgroup_bpf_detach() or\n__cgroup_bpf_detach() will correct it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/cgroup.c"], "versions": [{"version": "af6eea57437a830293eab56246b6025cc7d46ee7", "lessThan": "3527e3cbb84d8868c4d4e91ba55915f96d39ec3d", "status": "affected", "versionType": "git"}, {"version": "af6eea57437a830293eab56246b6025cc7d46ee7", "lessThan": "1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443", "status": "affected", "versionType": "git"}, {"version": "af6eea57437a830293eab56246b6025cc7d46ee7", "lessThan": "6336388715afa419cc97d0255bda3bba1b96b7ca", "status": "affected", "versionType": "git"}, {"version": "af6eea57437a830293eab56246b6025cc7d46ee7", "lessThan": "be001f9da71eaa3b61e186fb88bde3279728bdca", "status": "affected", "versionType": "git"}, {"version": "af6eea57437a830293eab56246b6025cc7d46ee7", "lessThan": "4c46091ee985ae84c60c5e95055d779fcd291d87", "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/cgroup.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.138", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.61", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.18", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.2", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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": "5.7", "versionEndExcluding": "5.10.138"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.61"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.18.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.19.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3527e3cbb84d8868c4d4e91ba55915f96d39ec3d"}, {"url": "https://git.kernel.org/stable/c/1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443"}, {"url": "https://git.kernel.org/stable/c/6336388715afa419cc97d0255bda3bba1b96b7ca"}, {"url": "https://git.kernel.org/stable/c/be001f9da71eaa3b61e186fb88bde3279728bdca"}, {"url": "https://git.kernel.org/stable/c/4c46091ee985ae84c60c5e95055d779fcd291d87"}], "title": "bpf: Fix KASAN use-after-free Read in compute_effective_progs", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix KASAN use-after-free Read in compute_effective_progs\n\nSyzbot found a Use After Free bug in compute_effective_progs().\nThe reproducer creates a number of BPF links, and causes a fault\ninjected alloc to fail, while calling bpf_link_detach on them.\nLink detach triggers the link to be freed by bpf_link_free(),\nwhich calls __cgroup_bpf_detach() and update_effective_progs().\nIf the memory allocation in this function fails, the function restores\nthe pointer to the bpf_cgroup_link on the cgroup list, but the memory\ngets freed just after it returns. After this, every subsequent call to\nupdate_effective_progs() causes this already deallocated pointer to be\ndereferenced in prog_list_length(), and triggers KASAN UAF error.\n\nTo fix this issue don't preserve the pointer to the prog or link in the\nlist, but remove it and replace it with a dummy prog without shrinking\nthe table. The subsequent call to __cgroup_bpf_detach() or\n__cgroup_bpf_detach() will correct it."}], "id": "CVE-2022-50219", "lastModified": "2025-06-18T13:47:40.833", "metrics": {}, "published": "2025-06-18T11:15:52.863", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3527e3cbb84d8868c4d4e91ba55915f96d39ec3d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4c46091ee985ae84c60c5e95055d779fcd291d87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6336388715afa419cc97d0255bda3bba1b96b7ca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/be001f9da71eaa3b61e186fb88bde3279728bdca"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: bpf: Fix KASAN use-after-free Read in compute_effective_progs", "id": "2373517", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373517"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Fix KASAN use-after-free Read in compute_effective_progs\nSyzbot found a Use After Free bug in compute_effective_progs().\nThe reproducer creates a number of BPF links, and causes a fault\ninjected alloc to fail, while calling bpf_link_detach on them.\nLink detach triggers the link to be freed by bpf_link_free(),\nwhich calls __cgroup_bpf_detach() and update_effective_progs().\nIf the memory allocation in this function fails, the function restores\nthe pointer to the bpf_cgroup_link on the cgroup list, but the memory\ngets freed just after it returns. After this, every subsequent call to\nupdate_effective_progs() causes this already deallocated pointer to be\ndereferenced in prog_list_length(), and triggers KASAN UAF error.\nTo fix this issue don't preserve the pointer to the prog or link in the\nlist, but remove it and replace it with a dummy prog without shrinking\nthe table. The subsequent call to __cgroup_bpf_detach() or\n__cgroup_bpf_detach() will correct it."], "name": "CVE-2022-50219", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50219\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50219\nhttps://lore.kernel.org/linux-cve-announce/2025061846-CVE-2022-50219-a138@gregkh/T"], "threat_severity": "Moderate"}