135 lines
6.2 KiB
JSON
135 lines
6.2 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-61626",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-07-10T17:38:57.110Z",
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"datePublished": "2026-10-30T14:52:21.006Z",
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"dateUpdated": "2026-11-04T22:45:05.471Z"
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},
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"containers": {
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"cna": {
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"title": "libass: Out-of-bounds bit clears for negative Matroska ReadOrder values",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-787",
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"lang": "en",
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"description": "CWE-787: Out-of-bounds Write",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"attackVector": "LOCAL",
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"attackComplexity": "HIGH",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "PASSIVE",
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"vulnConfidentialityImpact": "HIGH",
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"vulnIntegrityImpact": "HIGH",
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"vulnAvailabilityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"baseScore": 7.3,
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
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"version": "4.0"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/libass/libass/security/advisories/GHSA-5gf7-wjfm-vmvm",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/libass/libass/security/advisories/GHSA-5gf7-wjfm-vmvm"
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},
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{
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"name": "https://github.com/libass/libass/commit/23da65a130bb8c5b2cf0c7df0dd7d424607f98f1",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/libass/libass/commit/23da65a130bb8c5b2cf0c7df0dd7d424607f98f1"
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},
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{
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"name": "https://github.com/libass/libass/releases/tag/0.17.5",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/libass/libass/releases/tag/0.17.5"
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}
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],
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"affected": [
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{
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"vendor": "libass",
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"product": "libass",
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"versions": [
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{
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"version": ">= 0.17.4, < 0.17.5",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-10-30T14:52:21.006Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "libass is a portable subtitle renderer for the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format. From 0.17.4 until 0.17.5, libass event pruning does not guard negative Matroska `ReadOrder` values, allowing an attacker to clear arbitrarily many bits to zero at attacker-controlled positions near the NULL pointer. Exploitation requires a malicious Matroska stream loaded through `ass_process_chunk`, enabled read-order checking, and later pruning of the malicious events. Read-order checking is enabled by default unless `ass_set_check_readorder` is called with zero; pruning must occur explicitly through `ass_prune_events` or through automatic pruning previously enabled with `ass_configure_prune`. On common systems with arithmetic right shift, 32-bit int values, the upper address region reserved to the kernel, and matching binary/kernel architecture, the expected consequence is denial of service. More extensive exploitation on uncommon systems is theoretical and strongly constrained by the target addresses, bit-clearing-only mutation, and ASLR. This issue is fixed in version 0.17.5."
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}
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],
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"source": {
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"advisory": "GHSA-5gf7-wjfm-vmvm",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-11-04T22:44:29.050965Z",
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"id": "CVE-2026-61626",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-04T22:45:05.471Z"
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}
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}
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]
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}
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} |