CVE ID :CVE-2026-63872<\/p>\n
Published : July 19, 2026, 3:16 p.m. | 23\u00a0minutes ago<\/p>\n
Description :In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
esp: fix page frag reference leak on skb_to_sgvec failure<\/p>\n
In esp_output_tail(), when esp->inplace is false, the old skb page frags
\nare replaced with a new page from the xfrm page_frag cache. The source
\nscatterlist (sg) is built from the old frags before the replacement, and
\nesp_ssg_unref() is responsible for releasing the old page references
\nafter the crypto operation completes.<\/p>\n
However, if the second skb_to_sgvec() call (which builds the destination
\nscatterlist from the new page) fails, the code jumps to error_free which
\nonly calls kfree(tmp). The old page frag references captured in the
\nsource scatterlist are never released:<\/p>\n
1. sg[] is built from old frags via skb_to_sgvec() (no extra get_page)
\n 2. nr_frags is set to 1 and frag[0] is replaced with the new page
\n 3. Second skb_to_sgvec() fails -> goto error_free
\n 4. kfree(tmp) frees the sg[] memory but old frags are not unref’d
\n 5. kfree_skb() only releases frag[0] (the new page), not the old ones<\/p>\n
Fix this by adding a bool parameter to esp_ssg_unref() that, when true,
\nunconditionally unrefs the source scatterlist frags without checking
\nreq->src and req->dst, since those fields are not yet initialized by
\naead_request_set_crypt() at the point of the error. Existing callers
\npass false to preserve the original behavior.<\/p>\n
The same issue exists in both esp4 and esp6 as the code is identical.<\/p>\n
Severity: 0.0 | NA<\/p>\n
Visit the link for more details, such as CVSS details, affected products, timeline, and more…\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
CVE ID :CVE-2026-63872 Published : July 19, 2026, 3:16 p.m. | 23\u00a0minutes ago Description :In the Linux kernel, the following vulnerability has been resolved: esp: fix page frag reference leak on skb_to_sgvec failure In esp_output_tail(), when esp->inplace is false, the old skb page frags are replaced with a new page from the xfrm page_frag cache. …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82251","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82251","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82251"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82251\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82251"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}