CVE-2026-98969

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98969", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.383Z", "datePublished": "2026-10-23T12:19:42.012Z", "dateUpdated": "2026-10-30T12:40:35.763Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:40:35.763Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: em_text: reject unterminated algo before autoload\n\nThis is a follow-up to commit 9c572a83037a (\"net/sched: fix potential\nstack infoleak in em_text_dump()\"), which zero-initialised the dump-side\nstruct. Sashiko pointed at a pre-existing bug that exposed the change-side\ninput-validation gap open.\n\nem_text_change() casts the raw netlink attribute payload to struct\ntcf_em_text and passes conf->algo, a 16-byte array with no enforced NUL\nterminator, to textsearch_prepare(). On the TS_AUTOLOAD retry\ntextsearch_prepare() calls request_module(\"ts_%s\", algo); vsnprintf()\nwalks %s until it finds a NUL, so an algo[] with no NUL reads past the\narray into the adjacent struct fields and payload and feeds those bytes\nto the usermode helper command line. This is an out-of-bounds read and\na kernel memory disclosure.\n\nReject the attribute when no NUL exists within TC_EM_TEXT_ALGOSIZ bytes,\nmatching the check xt_string has had since 3ab720881b6e.\n\nConditions to recreate the bug:\n- CAP_NET_ADMIN on the target netns (namespace-local via unshare -Urn\n is enough)\n- install clsact on an interface, then add a basic filter with one text\n ematch whose algo[] is 16 bytes with no NUL (e.g. \"A\"*16) and\n pattern_len at least 1\n- the add fails with -ENOENT and the kernel invokes modprobe with a\n module name made of \"ts_\" plus the 16 bytes and the adjacent payload"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/em_text.c"], "versions": [{"version": "d675c989ed2d4ba23dff615330b04371aea83534", "lessThan": "64153f1dd14dabfd4e79bf506bb5b5d66f7b42eb", "status": "affected", "versionType": "git"}, {"version": "d675c989ed2d4ba23dff615330b04371aea83534", "lessThan": "b62fb105961b677418cbc0a0a8837a41735729ec", "status": "affected", "versionType": "git"}, {"version": "d675c989ed2d4ba23dff615330b04371aea83534", "lessThan": "b4da5c85cd701066ff429727fb61b84bde8bcce2", "status": "affected", "versionType": "git"}, {"version": "d675c989ed2d4ba23dff615330b04371aea83534", "lessThan": "00bcc303000bac524d62eed054d77372b38ace0f", "status": "affected", "versionType": "git"}, {"version": "d675c989ed2d4ba23dff615330b04371aea83534", "lessThan": "22182f91c6703af6e9832cffe6d22b381031cb5a", "status": "affected", "versionType": "git"}, {"version": "d675c989ed2d4ba23dff615330b04371aea83534", "lessThan": "85e5512369d4fe6e5f2c43712d9f9e01d4ae8437", "status": "affected", "versionType": "git"}, {"version": "d675c989ed2d4ba23dff615330b04371aea83534", "lessThan": "b627c6ba20be20334338229b4820baacb9d96826", "status": "affected", "versionType": "git"}, {"version": "d675c989ed2d4ba23dff615330b04371aea83534", "lessThan": "c9728fcf2e7fb4a7a8d08ebd9524c3b02ae1a021", "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/sched/em_text.c"], "versions": [{"version": "2.6.13", "status": "affected"}, {"version": "0", "lessThan": "2.6.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "2.6.13", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/22182f91c6703af6e9832cffe6d22b381031cb5a"}, {"url": "https://git.kernel.org/stable/c/85e5512369d4fe6e5f2c43712d9f9e01d4ae8437"}, {"url": "https://git.kernel.org/stable/c/b627c6ba20be20334338229b4820baacb9d96826"}, {"url": "https://git.kernel.org/stable/c/c9728fcf2e7fb4a7a8d08ebd9524c3b02ae1a021"}], "title": "net/sched: em_text: reject unterminated algo before autoload", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sched/em_text.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "64153f1dd14dabfd4e79bf506bb5b5d66f7b42eb", "status": "affected", "version": "d675c989ed2d4ba23dff615330b04371aea83534", "versionType": "git"}, {"lessThan": "b62fb105961b677418cbc0a0a8837a41735729ec", "status": "affected", "version": "d675c989ed2d4ba23dff615330b04371aea83534", "versionType": "git"}, {"lessThan": "b4da5c85cd701066ff429727fb61b84bde8bcce2", "status": "affected", "version": "d675c989ed2d4ba23dff615330b04371aea83534", "versionType": "git"}, {"lessThan": "00bcc303000bac524d62eed054d77372b38ace0f", "status": "affected", "version": "d675c989ed2d4ba23dff615330b04371aea83534", "versionType": "git"}, {"lessThan": "22182f91c6703af6e9832cffe6d22b381031cb5a", "status": "affected", "version": "d675c989ed2d4ba23dff615330b04371aea83534", "versionType": "git"}, {"lessThan": "85e5512369d4fe6e5f2c43712d9f9e01d4ae8437", "status": "affected", "version": "d675c989ed2d4ba23dff615330b04371aea83534", "versionType": "git"}, {"lessThan": "b627c6ba20be20334338229b4820baacb9d96826", "status": "affected", "version": "d675c989ed2d4ba23dff615330b04371aea83534", "versionType": "git"}, {"lessThan": "c9728fcf2e7fb4a7a8d08ebd9524c3b02ae1a021", "status": "affected", "version": "d675c989ed2d4ba23dff615330b04371aea83534", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sched/em_text.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.13"}, {"lessThan": "2.6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: em_text: reject unterminated algo before autoload\n\nThis is a follow-up to commit 9c572a83037a (\"net/sched: fix potential\nstack infoleak in em_text_dump()\"), which zero-initialised the dump-side\nstruct. Sashiko pointed at a pre-existing bug that exposed the change-side\ninput-validation gap open.\n\nem_text_change() casts the raw netlink attribute payload to struct\ntcf_em_text and passes conf->algo, a 16-byte array with no enforced NUL\nterminator, to textsearch_prepare(). On the TS_AUTOLOAD retry\ntextsearch_prepare() calls request_module(\"ts_%s\", algo); vsnprintf()\nwalks %s until it finds a NUL, so an algo[] with no NUL reads past the\narray into the adjacent struct fields and payload and feeds those bytes\nto the usermode helper command line. This is an out-of-bounds read and\na kernel memory disclosure.\n\nReject the attribute when no NUL exists within TC_EM_TEXT_ALGOSIZ bytes,\nmatching the check xt_string has had since 3ab720881b6e.\n\nConditions to recreate the bug:\n- CAP_NET_ADMIN on the target netns (namespace-local via unshare -Urn\n is enough)\n- install clsact on an interface, then add a basic filter with one text\n ematch whose algo[] is 16 bytes with no NUL (e.g. \"A\"*16) and\n pattern_len at least 1\n- the add fails with -ENOENT and the kernel invokes modprobe with a\n module name made of \"ts_\" plus the 16 bytes and the adjacent payload"}], "id": "CVE-2026-98969", "lastModified": "2026-10-30T13:21:33.367", "metrics": {}, "published": "2026-10-23T13:17:18.440", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/00bcc303000bac524d62eed054d77372b38ace0f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/22182f91c6703af6e9832cffe6d22b381031cb5a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64153f1dd14dabfd4e79bf506bb5b5d66f7b42eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/85e5512369d4fe6e5f2c43712d9f9e01d4ae8437"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b4da5c85cd701066ff429727fb61b84bde8bcce2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b627c6ba20be20334338229b4820baacb9d96826"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b62fb105961b677418cbc0a0a8837a41735729ec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c9728fcf2e7fb4a7a8d08ebd9524c3b02ae1a021"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net/sched: em_text: reject unterminated algo before autoload", "id": "2559715", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559715"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/sched: em_text: reject unterminated algo before autoload\nThis is a follow-up to commit 9c572a83037a (\"net/sched: fix potential\nstack infoleak in em_text_dump()\"), which zero-initialised the dump-side\nstruct. Sashiko pointed at a pre-existing bug that exposed the change-side\ninput-validation gap open.\nem_text_change() casts the raw netlink attribute payload to struct\ntcf_em_text and passes conf->algo, a 16-byte array with no enforced NUL\nterminator, to textsearch_prepare(). On the TS_AUTOLOAD retry\ntextsearch_prepare() calls request_module(\"ts_%s\", algo); vsnprintf()\nwalks %s until it finds a NUL, so an algo[] with no NUL reads past the\narray into the adjacent struct fields and payload and feeds those bytes\nto the usermode helper command line. This is an out-of-bounds read and\na kernel memory disclosure.\nReject the attribute when no NUL exists within TC_EM_TEXT_ALGOSIZ bytes,\nmatching the check xt_string has had since 3ab720881b6e.\nConditions to recreate the bug:\n- CAP_NET_ADMIN on the target netns (namespace-local via unshare -Urn\nis enough)\n- install clsact on an interface, then add a basic filter with one text\nematch whose algo[] is 16 bytes with no NUL (e.g. \"A\"*16) and\npattern_len at least 1\n- the add fails with -ENOENT and the kernel invokes modprobe with a\nmodule name made of \"ts_\" plus the 16 bytes and the adjacent payload", "A flaw was found in the Linux kernel's packet scheduling subsystem. A local attacker with network administration privileges can trigger this flaw by submitting a text-matching filter configuration with a non-null-terminated algorithm name. When attempting to automatically load the corresponding module, the kernel reads beyond the allocated buffer, resulting in an information disclosure of adjacent kernel memory."], "name": "CVE-2026-98969", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98969\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98969\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98969.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,00bcc303000bac524d62eed054d77372b38ace0f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,22182f91c6703af6e9832cffe6d22b381031cb5a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,85e5512369d4fe6e5f2c43712d9f9e01d4ae8437)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,b627c6ba20be20334338229b4820baacb9d96826)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,c9728fcf2e7fb4a7a8d08ebd9524c3b02ae1a021)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,00bcc303000bac524d62eed054d77372b38ace0f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,22182f91c6703af6e9832cffe6d22b381031cb5a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,85e5512369d4fe6e5f2c43712d9f9e01d4ae8437)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,b627c6ba20be20334338229b4820baacb9d96826)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d675c989ed2d4ba23dff615330b04371aea83534,c9728fcf2e7fb4a7a8d08ebd9524c3b02ae1a021)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T17:00:15.617799+00:00", "updated": "2026-10-29T22:45:03.529519+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}